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DV 311 USwww.goimo.com
IMO Anlagenbau offers future-oriented products and solutions in themachine and plant manufacturing sector as well as environmental technology.In addition to standard machines and special machines, the company‘sactivities include development and implementation of solar tracking systems,as well as solar home systems. The IMO Anlagenbau experts also offerconsulting support and take charge of turn-key projects.
IMO Antriebseinheit is specialized in developing and manufacturingpinion or worm driven Slew Drives. These patented componentsystems are used for example in manlift platforms, steering gears,construction machinery and solar trackers.
IMO Energy is one of the leading suppliers of yaw and blade bearingsfor onshore and offshore wind turbines. Slewing Rings manufacturedby IMO Energy are also used as single main bearing for gear- and shaftlesswind turbines and as blade bearing for tidal stream systems.
IMO Momentenlager is developing, manufacturing and supplying Balland Roller Slewing Rings up to a diameter of 5,200 mm / 204.724 inin a wide range of products. They are used for instance in the followingapplications: special purpose machinery, construction machinery, cranes andmanlift platforms, tunnel boring machines, ship building, medical technologyand bulk handling.
IMO Holding acts as service provider for the other companies of theIMO Group. IMO Holding comprises the central departments of the Groupsuch as quality assurance, finance, human resource, IT and marketing.
Nomenclature
Slewing Ring design1:2:3:4:5:6:7:8:9:0:
1 2 – 60 5012 / 2 – 01234
Drawing reference number
Gearing heat treatment1:2:3:4:5-9:0:
For Slewing Rings: Raceway diameter [inches]For gear rims and pinions: Pitch circle diameter [inches]For rings: Outside diameter [inches]
For Slewing Rings: Rolling element diameter [inches]For gear rims and pinions: Module [inches]
NormalizedQuenched and temperedTooth flanks surface hardenedTooth flanks and roots surface hardenedIdentification for special designsUntoothed
Gear type:1:2:3-9:0:
External toothedInternal toothedIdentification for special designsUntoothed
Single Row Ball Slewing RingCross Roller Slewing RingTriple Row Roller Slewing RingDouble Row Ball Slewing RingRoller / Ball Combination Slewing RingGear rim / pinion / ringWire race bearing / fitting elementDouble Axial Slewing RingBall Slewing Ring with flange ringSpecial Slewing Ring
Preface and Imprint
IMO has developed, designed, manufactured andsold large diameter anti-friction bearings globallyfor many years. Our current range of products upto a diameter of 5,200 mm (204 in) is presentedin this catalog. Special designs are also available,please contact our Engineering Department forassistance (the contact details are on the back ofthe catalog).
In this catalog we provide you with comprehensiveinformation about our standard range of Ball andRoller Slewing Rings. The catalog has a referencenumber on the front cover. Please always checkthis is the latest edition before using the informationcontained within it.
You will find the “Application Data Sheet” on pages60/61 in this catalog. If you require assistance withany Slewing Ring application, please fill in this form.This gives us an overview of the application andrepresents a record of your requirements.
Slewing Rings are safety critical products. They haveto meet your requirements exactly and perform inthe environmental conditions of your application.Therefore, it is important to fill in the formcompletely, with as much details as possible andsend it to us. You will then receive ourrecommendation for the right IMO product for yourapplication and gain the benefit of years ofexperience meeting challenging customerrequirements and operating conditions! If theapplication data sheet has already been removedwe will be pleased to send you another one. Theapplication data sheet can also be downloadedfrom our homepage www.goimo.com.
You can find information on our Slew Drive productline in the Slew Drive catalog ST105E and ST205US,which we will send you on request. Further detailsof our company, products, their application andutilization can be found in our detailed companybrochure IM104E.
IMO terms and conditions shall apply to allquotations and purchase orders. Further we wouldlike to ask you to follow closely our Installation andOperating Manuals which contain important data.You can find these on our homepage.
The observance of our Installation and OperatingManuals is important for the reliability and safetyof our product and has a great influence on theservice life. The Installation and Operating Manualscontain practical information to help you with thedesign of your mounting structure.
All the information in this catalog has been carefullyevaluated and checked.We cannot accept responsibility for omissions anderrors in this publication.
Published by:
IMO Holding GmbHImostrasse 191350 GremsdorfGermanyTel: +49 9193 6395-0Fax: +49 9193 [email protected]
Copyright © December 2010by IMO Holding GmbH, Gremsdorf
No part of this catalog maybe reproduced without thewritten permission of thepublisher. All rightsreserved.
Registered in the U.S. Patent andTrademark Office (USA)
®
Technical solutions made by IMO may be coveredby several intellectual property rights. Some of ourcurrently patented item(s) or pending patentapplication(s) are revealed by:
US-Patent 5,834,662
Patent pending US 11/991,348Patent pending US 11/635,140Patent pending US 12/312,057Patent pending US 11/921,710
Our product range, designs and intellectual propertyrights are being continually updated and revised.
Please contact us for the latest information!
IMO USA Corp.101 Innovation DriveMc Queen ParkSummerville, SC 29483Tel. +1 843 [email protected]
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The IMO Group in the metropolitanregion of Nuremberg with head-quarters located in Gremsdorf hasmore than 20 years of experiencein designing and manufacturingSlewing Rings and Slew Drives. Fu-ture-oriented technologies and so-lutions in the machine and plantmanufacturing sector complementthe portfolio.
Our headquarters in Germany arecertified according to the standardsDIN EN ISO 9001, 14001 andOHSAS 18001.Several times, IMO has achievedawards for its product innovationsat Exhibitions for Ideas-Invention-New Products and has also earnedseveral awards for its exceptionalgrowth. In our sector we are one ofthe leading suppliers. We export ourproducts worldwide.
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P. 4 - 37ProductInformation
P. 38 - 490,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0
0102030405060708090
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Diagramm
TechnicalInformation
P. 50 - 51
Ball Slewing Ringswith flange rings
Series 920
P. 52 - 59
Single Row BallSlewing Rings
Series116, 120, 125, 150
P. 60 - 61
ApplicationData Sheet -Slewing Rings
Table of Contents
Fax
Fax
Fax
Fax
Type of load:
“Compressive”axial load
“Suspended”axial load
Ambient temperature:
Do shocks or vibrations occur?
Special seals required?
Works Certificate?
No
No
No
minimum °F
4
from 51 to 65
Product Line Overview / Comparison
Design types Series Raceway diameters Maximum tangentialtooth force 1)
[inch]DL
[lbs x 1000]
Single Row BallSlewing Rings
fz max
from 6 to 9
from 15 to 19
from 3.6 to 4.2
from 6 to 9
from 12 to 19
1) The data refers to the minimum and maximum diameter per series
from 70.87 to 110.24
from 17.91 to 57.28
from 12.24 to 42.95
from 3.94 to 19.69
from 37.60 to 57.28
from 12.24 to 42.95
Series 150
Series 125
Series 120
Series 116
Series 932*)
Series 920
Ball Slewing Ringswith flange rings
Typical applications:Simple turntables, slewingmechanisms, bogies, light cranesand construction machinery.
Typical applications:Turntables, slewing mechanisms,bogies, light to medium-sizedcranes and constructionmachinery, winders,wind energy turbines, handlingequipment.
*) This series is not part of the catalog. For details about this series please have a look at www.goimo.com or contact our US office.
5
from 2110 to 5169 from 1894 to 2945 from 708 to 1101 from 1680 to 2657
Static axial load rating Static radial load rating
Weight 1)Load carrying capacity 1) ClearanceMaximum tiltingmoment 1) 2)
[ft-lbs x 1000] [lbs x 1000] [lbs x 1000] [lbs]
Radial clearance0 - 7.87
Axial tilting clearance0 - 15.75
Radial clearance0 - 7.87
Axial tilting clearance0 - 15.75
Precision versionup to max. 1.18 mm
Radial clearance0 - 7.87
Axial tilting clearance0 - 15.75
Precision versionup to max. 2.36
Radial clearance0 - 9.84
Axial tilting clearance0 - 15.75
Radial clearance0 - 15.75
Axial tilting clearance0 - 29.53
Mk max C0 ax C0 rad G
from 12 to 111 from 47 to 164 from 20 to 70 from 42 to 192
from 325 to 764 from 619 to 943 from 231 to 353 from 289 to 551
from 2 to 37 from 23 to 116 from 11 to 57 from 11 to 53
from 26 to 229 from 101 to 353 from 43 to 151 from 46 to 201
from 89 to 851 from 273 to 872 from 102 to 326 from 117 to 514
2) The tilting moment capacity for each unit should be confirmed by referring to the limiting load diagram for each individual model
Radial clearance0 - 11.81
Axial tilting clearance0 - 19.69
Precision versionup to max. 2.36
[milli inch]
6
Product Line Overview / Comparison
[inch]DL
[lbs x 1000]
Roller / Ball CombinationSlewing Rings
fz max
from 69 to 92
from 91 to 111
from 66 to 66
from 101 to 101
1) The data refers to the minimum and maximum diameter per series
from 167.32 to 192.91
from 139.76 to 167.32
from 100.75 to 162.99
from 86.57 to 129.92
Double AxialSlewing Rings
Series 540*)
Series 532*)
Series 850*)
Series 840*)
Design types Series Raceway diameters Maximum tangentialtooth force 1)
*) This series is not part of the catalog. For details about this series please have a look at www.goimo.com or contact our US office.
Typical applications: Turntables, slewingmechanisms, bogies, winders,
Typical applications:Reclaimers, stackers and otherequipment for bulk materialshandling, turntables.
medium-sized to large cranes and constructionmachinery. Applications such as for Single RowBall Slewing Rings with higher axial load.
7
[ft-lbs x 1000] [lbs x 1000] [lbs x 1000] [lbs]
Radial clearance0 - 19.69
Axial clearance0 - 19.69
Radial clearance0 - 12.60
Axial clearance0 - 12.60
Radial clearance0 - 15.75
Axial clearance0 - 15.75
Mk max C0 ax C0 rad G
from 3233 to 6812 from 2335 to 3504 from 467 to 700 from 2729 to 4341
from 4913 to 11926 from 3278 to 5303 from 664 to 1068 from 4171 to 7236
from 12268 to 17492 from 7196 to 8615 from 243 to 292 from 4471 to 5412
from 20395 to 27119 from 10055 to 11593 from 315 to 364 from 7648 to 8818
2) The tilting moment capacity for each unit should be confirmed by referring to the limiting load diagram for each individual model
Radial clearance0 - 15.75
Axial clearance0 - 15.75
Static axial load rating Static radial load rating
Weight 1)Load carrying capacity 1) ClearanceMaximum tiltingmoment 1) 2)
[milli inch]
8
Product Line Overview / Comparison
from 2 to 46
[inch]DL
[lbs x 1000]
Triple Row RollerSlewing Rings
fz max
from 42 to 72
from 69 to 101
from 90 to 126
from 118 to 166
from 171 to 184
Series 350*)
Series 340*)
Series 332*)
Series 325*)
Series 320*)
1) The data refers to the minimum and maximum diameter per series
from 4.72 to 72.64
from 124.02 to 187.01
from 110.24 to 177.17
from 88.19 to 157.48
from 70.87 to 110.24
from 49.21 to 78.74
Other StandardBall Slewing Rings
Design types Series Raceway diameters Maximum tangentialtooth force 1)
Typical applications:Heavy harbour cranes,shipboard cranes, ladle turretsand grab cranes, radarantennas, wind energy turbinemain bearings, tunnel boringmachines and loading buoys(oil, gas swivels), machine tools(in general where theapplication requires high dutycycles).
*) This series is not part of the catalog. For details about this series please have a look at www.goimo.com or contact our US office.
Typical applications: Turntables, slewing mechanisms,bogies, light to medium-sized cranes,construction machinery, wind energyturbines and winders (applicationssuch as double axial Slewing Ringswith increased radial load).
9
from 1 to 1571 from 18 to 1451 from 7 to 542 from 9 to 1056
[ft-lbs x 1000] [lbs x 1000] [lbs x 1000] [lbs]
Radial clearancemax. 15.75
Axial clearancemax. 5.12
Radial clearancemax. 19.69
Axial clearancemax. 6.69
Radial clearancemax. 23.62
Axial clearancemax. 7.87
Radial clearancemax. 23.62
Axial clearancemax. 7.87
Radial clearanceacc. to version
Axial clearanceacc. to version
Mk max C0 ax C0 rad G
from 1280 to 3257 from 1660 to 2655 from 132 to 222 from 1188 to 2011
from 3152 to 7775 from 2924 to 4548 from 303 to 493 from 2427 to 3935
from 5980 to 19080 from 4351 to 7769 from 419 to 780 from 4354 to 8272
from 9957 to 27541 from 6289 to 10107 from 525 to 878 from 7083 to 11927
from 15543 to 35662 from 8276 to 12480 from 875 to 1381 from 11305 to 17350
2) The tilting moment capacity for each unit should be confirmed by referring to the limiting load diagram for each individual model
Radial clearancemax. 9.84
Axial clearancemax. 3.15
Static axial load rating Static radial load rating
Weight 1)Load carrying capacity 1) ClearanceMaximum tiltingmoment 1) 2)
[milli inch]
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Replaces traditional systems using fixed andfloating bearings as well as king pinsBall and Roller Type Slewing Ring configurationsAvailable in diameters from 100 to 5,200 mm(3.937 to 204.724 in)Integrated mounting holesAvailable with integral internal or external gearingof bearing rings (module 1 to 30 mm /25,4 to 0,846 1/in)Sealed raceway system with grease lubricationStandard series and special designsCertified to meet EN 10204 requirements formaterials, dimensions and operating specifications
Large-diameter anti-friction Slewing Rings designedto handle simultaneously occuring axial, radial andmoment loads.
A comparison of the Slewing Rings:On the left are the smallest(internal diameter 40 mm / 1.575 in)and the largest (outside diameter5,200 mm / 204.724 in)IMO Slewing Rings.Below is the smallest racewayroller which we use(diameter 12 mm / 0.472 in)and the largest ball(diameter 70 mm / 2.756 in).
“Diameters up to 5,200 mm / 204.724 in -we supply XXL Slewing Rings!”.
10
Serv
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Exp
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Serv
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IMO is able to offer you a unique service on the market:Depending on the size and features of the Slewing Ringwe are able to manufacture and deliver urgently neededspare parts or prototypes in only a few weeks whetherstandard or special designs.
11
in only a few weeks!in only a few weeks!
“IMO cannot perform miracles, but we will do our utmost tomeet what others describe as ’impossible’ delivery requirements.IMO”s Express Service has already met the emergency needs ofmany customers. Try us!“
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Ball Slewing Rings with flange rings
Roller / Ball Combination Slewing Rings
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Single row design with four-point raceway geometry
Untoothed rings with flange thicknesses of 12 and 21 mm /0.472 and 0.827 in
Ball diameters 20 and 32 mm / 0.788 and 1.260 in
Available ex stock or with a short delivery time as standard seriesin 14 sizes
Raceway diameters of 311 to 1,091 mm or 955 to 1,455 mm /12.244 to 42.953 in or 37.598 to 57.283 in
For applications with light loads
Enables lightweight structures in spite of large bearing diameters
Applications: Handling technology, manlift platforms, turntables
Roller raceway to take up the axial loads
Ball raceway provides support for radial loads. All parts areretained together as a unit during fitting
Ball diameters 25 to 70 mm / 0.984 to 2.756 in, rollerdiameters up to 100 mm / 3.937 in
Used in applications with a dominant axial force and lowradial load / tilting moments
Standard series with outside diameters up to 5,176 mm /203.780 in
Frequently produced as special designs according to customerrequirements
Typical applications: Bulk materials handling, stacker reclaimers,bucket wheel excavators, machine tools
Ball Slewing Rings
13
Single row (picture above) and double row (picture below) designs
Ball diameters 12 to 70 mm / 0.472 to 2.756 in
Four-point raceway geometry
Optional preloaded raceway system and centerings
Enables robust designs for arduous application conditions
High resistance to 'false brinelling' in heavy vibration conditions
Reduced sensitivity to shape deformations in the mountingstructure
Higher static load capacity than similar design CrossRoller Slewing Rings
Catalog series with outside diameters from 180to 2,971 mm / 7.087 to 116.968 in
Often designed as special versions according to customerrequirements (outside diameters up to 5,200 mm / 204.724 in)
Frequently used in wind energy turbines, cranes,construction machinery, mechanical engineeringand special purpose machinery
Cross Roller Slewing Rings
Double Axial Slewing Rings
14
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Double row design with large supporting balls and smaller retaining balls
Ball diameters 20 to 70 mm / 0.787 to 2.756 in
Both raceways in two point geometry
Frequently replaced by double row Ball Slewing Rings in new designs
Standard series with outside diameters up to 5,200 mm / 204.724 in
Used in cranes and as replacement parts for existing equipment
Special designs can be supplied
Single row roller raceway under 45 degrees
Roller diameters 12 to 60 mm / 0.472 to 2.362 in
Alternately arranged rolling elements
Constant friction torque with different loads
Higher dynamic service life than similar Ball Slewing Ring designs
Higher demands on the rigidity and precision of the mounting structure in comparison with Ball Slewing Rings
Applications: Robots, antennas, medical technology, positioning devices, machine tools
Can be supplied to special customer requirements
15
Roller Slewing Rings
Triple Row Roller Slewing Rings
Roller diameters 10 to 100 mm / 0.393 to 3.937 in
Plastic, steel or brass cage segments according to loads(can also be supplied with closed cage)
Designed to provide the combination of the highest capacity in the smallest configuration
Greater static and dynamic load capacity, higher rigidity and constant friction torquecompared with all other Slewing Ring designs (with the same raceway diameter)
High requirements on the rigidity and precision of the mounting structure
Standard series with outside diameters from 1,462 to 5,179 mm / 57.559 to 203.897 in
Mostly supplied as customer specific designs
Surface coating
Depending on the requirementsof the application, the surfacesof our Slewing Rings can beprovided with metallic and non-metallic coatings, which ensureeffective corrosion protection.
ZnFeCo coating, dark-coloured,according to MIL specification
ZnFe coating
Gearing
We supply Slewing Rings with internal, external, straight and helical gears, (in various heattreated conditions) as well as untoothed Slewing Rings. The point of maximum runout of thegearing at which the circumferential backlash of the pinion should be adjusted, is marked ingreen.
External straight gear, quenched and temperedExternal helical gear,normalized
We supply modules from 1 to 30 mm /Pd from 25.4 to 0.846 1/in
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(pictured: Modules 3 mm and 20 mm /Pd 8.47 and 1.27 1/in )
Priming and multi-coat painting Zinc-coated surface (flame-sprayed)
Metal zinc spraying (flame spraying) on sand-blasted surface
Quenched and tempered ring, inductionhardened wear resistant tooth flanks
Hardened tooth flanks and roots Hardened tooth flanks androots in only one segment
Teeth in only one segmentExternal toothed Slewing Ring, quenched and tempered rings,raceway 3,000 mm, module 20 mm / 118.11 in, Pd 1.27 1/in
17
Special Slewing Rings withceramic balls (dry running),stainless steel rings, square-sectioned raceway (low frictiontorque) and labyrinth seal.
Ceramic and steel balls
Series 920 Slewing Rings, butwith stainless steel rings androllers
NBR70 seal fixed withstainless steel wire
Steel plate as primary seal
Special materials
Seals
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Plastic cage for highcircumferential speeds
Plastic spacers for low circumferentialspeeds
Rolling element guided brass rollercage made for horizontal axis rotation
Untoothed Roller / Ball Combination Slewing Ring, outside diameter 4,300 mm / 169.291 in
Rolling element separation
Brass cage for Ball Slewing Ring withlonger service life and higher rotationalspeed requirements
Steel cage segments for acrane Slewing Ring
19
Eccentric bearing unit from a machine tool used for diesel engine crankshaft machining. The bearing unitcontains two high precision Cross Roller raceways and one slide bearing. The integrated toothing makes itpossible to adjust the eccentricity allowing machining of all crankshaft bearing surfaces in just one operation.The unit has an external diameter of around 1,200 mm / 47.244 in. Completely manufactured by IMO!
Other special designs
“We show what is possible!”
20
Slewing Rings matched to customer requirements, e.g. custom mounting hole patterns or prototype designsGeometry of the Slewing Ring adapted to the installation conditionsSuitable for extreme temperatures and vacuumsSpecial cages for high circumferential speedsSpecial sealing systems for specific applicationsSpecial lubrication according to customer requirementsRings made of special materials
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IMO: “Engineering at its best!”
Imagine you require a special Slewing Ringthat does not show any linear expansionwith temperature increase and no shrinkageas it cools. Do you think this is impossible?Are you sure?
Customer specific wire race bearing withrings manufacured from a high nickel richmaterial with a thermal expansion coefficientof practically zero. Such a bearing wasdeveloped and manufactured by IMO!
Split Slewing Rings are ideal for situations where abearing has to be fitted around an existing structure, orwhere complete dismantling of a machine would beuneconomic. Typical applications are stone compactors,tool magazines and yaw bearings of clarification plants.
21
We manufacture gear rims up to outsidediameters of 5,250 mm / 206.692 inand module 30 mm / Pd 0.846 1/in.
Double Row Angular Contact CylindricalRoller Slewing Ring for the chain wheel ofa tracklaying vehicle. These separable ringsare not self-supporting but integrated intothe housing as individual parts by thecustomer.
We supply customer specific pinionsfrom 12 mm module / Pd 2.12 1/in
Finish turned and bored mountingflanges and supporting ringscomplete our production lines.
180 deg gear ringsegments, 5 degright-hand helicalgearing
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“We also supply complete solutions!”
Our pinion and worm driven Slew Drives are ready to installsystem modules consisting of:
A Ball or Roller Slewing Ring Hydraulic or electric motors (direct drive or with gearbox) A totally enclosed housing Attachments on request (brakes, position feedback sensors)
Bolt on the Slew Drive, connect the motorand start slewing - as simple as that!
IMO's innovative Slew Drives have a lot to offer…
No adjusting of components Complete system instead of many single parts Compact design High output torques thanks to the high gear ratio
… and are used in many applications such as steering gear in special vehicles, hingesin manlift platforms, in cranes and in attachments for stackers and excavators.
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You can find our complete standard lines in our ProductCatalog ST 305 US. We also supply customized designs.Request a copy of the catalog straight away by e-mail:[email protected].
IMO Slewing Rings - approved foruse in arctic conditions (operationdown to -22°F, proof of structuralintegrity under load at -40°F)
Offshore - the future!
The nacelle with Yaw Bearingalready attached, is loweredonto the turbine tower.
Single Row Ball Slewing Ring, with internalteeth, zinc coated surface (flame-sprayed) andpainted. Used on top of the turbine tower asa Yaw Bearing to allow the nacelle and rotorto orientate into wind.
Double Row untoothed Ball Slewing Ring,with cage and special seals, zinc- coatedsurfaces (flame-sprayed) and painted.Such Slewing Rings are used to adjustthe rotor blades (three per wind turbine).
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Slewing Ring in delivery condition, unpacked:Raceway soft spots marked with “S”, nameplatein the vicinity of the filling plug (here withcustomer specific barcode).
Tidal EnergyIMO blade bearings are used in tidalstream systems in a water depth of20 m / 65.616 ft.
Courtesy of Marine Current Turbines Ltd.
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A wind energy turbine with a rotor diameter of 82 m / 269 ft anda power of 1.65 MW. This turbine can provide electric power for1,200 homes. IMO develops Slewing Rings for such wind energyturbines with the latest equipment according to recognized procedures.The calculation is carried out according to the relevant regulationsfrom Germanischer Lloyd, the DNV and other well-known certifyingauthorities.
25
Shipboard cranes
Harbour cranes, mobile harbour cranes
Railway slewing cranes
Manlift platforms, mobile cranes
Specifications:
Outside diameter 5,000 mm / 196.85 in Support roller diameter 50 mm / 1.968 in Maximum permissible tilting moment 65,000 kNm / 47941400 ft-lbs Module 24 mm / 0.945 in Weight 8,500 kg / 18739.1 lbs
26 27
Triple Row Roller Slewing Ring with an outsidediameter of about 5,000 mm / 196.85 in and rootand flank hardened internal toothing. This SlewingRing for an Indonesian harbour pontoon crane wasmanufactured and shipped by IMO in only 8 weeks.
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Special Slewing Rings (wire race bearing) with stainlesssteel rings for a slip ring assembly on an FPSO. Ahighly accurate and very narrow bearing gap ensuresthe necessary EExd - explosion pressure protection.In the case of an explosion on the upper side of thewire race bearing there must be no possibility ofignition sparks penetrating through the bearing andcausing a secondary detonation on the lower side.
Ball Slewing Ring with root and flank hardened external toothing for a ship`s thruster on avessel. The stamp by Lloyd's Register of Shipping can be clearly seen. With our partners weare able to fulfill the specifications of all leading certifying authorities.
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FPSOs (Floating Production Storage Offloading) areoil processing ships which pump crude oil from thebottom of the sea by injecting high-pressure media.The ship 'weather vanes' around a swivelincorporating a Triple Row Roller Slewing Ring.
Slewing Rings for offshore applications are always subject to special approval requirements fromthe respective certifying authority. The rolled rings must demonstrate a notched bar impact strengthof an average of 42 J at -4°F.
The picture below shows the final assembly of an internal toothed Triple Row Roller Slewing Ringfor a large offshore crane. 29
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This stacker on board of a ship is swivelled bymeans of an internal toothed Triple Row RollerSlewing Ring.
Specification: Outside diameter 3,250 mm / 127.952 in Maximum tilting moment 13,000 kNm / 9588290 ft-lbs
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Bulk materials handling in the harbour is carried out by stackersand reclaimers, which are equipped with external toothed,
Roller / Ball Combination Slewing Rings with raceways in a diameterrange of 4 to 5 m / 13.123 to 16.404 ft.
Specification: Stacker reclaimer with 80 m / 262.464 ft boom Outside diameter 4,300 mm / 169.291 in Roller diameter 40 mm / 1.575 in, ball diameter 32 mm / 1.260 in Maximum axial force 4,000 kN / 899236 lbs Maximum swivelling moment 6,000 kNm / 4425360 ft-lbs
31
The erector uses a Cross Roller Slewing Ringfor lifting and positioning the concrete lining
segments (Tubbing) which are used forstrengthening the tunnel walls.
Tunnel boring machines use large and heavy Triple RowRoller Slewing Rings in cutting heads.
Triple Row Roller Slewing Ring for a microtunnel boring machine.
Specification: Raceway diameter 4,500 mm / 177.165 in Outside diameter 4,700 mm / 185.039 in Roller diameter 40 mm / 1.575 in Double lip seals with primary labyrinth
32
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We manufacture Triple Row Roller Slewing Rings for cover swing gears ofelectric arc furnaces (so-called EAFs, picture above) as well as Triple Row
Roller Slewing Rings for ladle turrets (picture below).
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The Ball Slewing Ring shown has special sealsand compensates for the relative rotationalmovements of the split rollers (the actual rollers).
Tandem asphalt compaction rollers use untoothedSlewing Rings as steering bearings, which arecoated to prevent corrosion.
Ball Slewing Rings witha horizontal rotating axis
are used in the knucklejoint of the refuse
compactor.
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ach
inery
Precision Single Row Ball Slewing Rings with cages are used for the rotatingcarousels in fast running blow moulders for the production of polyethelenePET bottles. Such Slewing Rings run continuously and reliable service life is anessential design criterion.
35
Ap
pli
cati
on
sSp
eci
al
Pu
rpo
se M
ach
inery
Linear accelerators are used in oncology for radiation therapies.The Ball Slewing Rings with horizontal rotational axes have tobe highly precise with a minimum of running noise and frictiontorque.
36
Ap
pli
cati
on
sM
ed
ical
Tech
no
log
yVariable winding and unwinding systems
in printing machines require highprecision. Smooth running Cross Roller
Slewing Rings fulfill all requiredcriterion and are perfectly adaptable forthis application. In this picture you cansee a Cross Roller Slewing Ring, partlyassembled with a raceway diameter ofapproximately 1,300 mm / 51.181 in.
In Cross Roller Slewing Rings, the rollersare arranged crosswise and run in a square
sectioned raceway.
37
Ap
pli
cati
on
sSp
eci
al
Mech
an
ical
En
gin
eeri
ng
38
Cax
CaxT
CaxH
Crad
C0ax
C0axT
C0axH
C0rad
da
DL
Dw
fa
Fax
FaxD
Frad
FradD
FradZ
Frad max
Fsp
Fz
fz norm
fz max
G
Technical Information
Basic axial dynamic load rating
Basic axial dynamic load rating,supporting raceway
Basic axial dynamic load rating,retaining raceway
Basic radial dynamic load rating
Basic axial static load rating
Basic axial static load rating,supporting raceway
Basic axial static load rating,retaining raceway
Basic radial static load rating
Outside diameter, inner ring
Raceway diameter of rolling elements(see Product Overview)
Diameter of rolling elements
Application service factor
Axial force including all occurring shock loads andrequired safety factors, calculated from all axialforces
Equivalent axial force including application servicefactor for determining the load point in the limitingload diagram
Radial force including all occurring shock loadsand required safety factors, calculated from allradial forces
Equivalent radial force for determining of MkD
Radial force from gearing circumferential force
Limit value for checking frictional contact
Initial preload on bolt
Operating gearing circumferential force
Permissible gearing circumferential force for toothbase fatigue strength
Maximum permissible gearing circumferential forceagainst overload fracture
Mass (weight)
Symbols and units
lbs
lbs
lbs
lbs
lbs
lbs
lbs
lbs
inch
inch
inch
—
lbs
lbs
lbs
lbs
lbs
lbs
lbs
lbs
lbs
lbs
lb
H
i
Pd
m
Mk
MkD
MW
MWA
n
nb
nmax
nperm
S0
S0rad
SF
x1
x2
z1
z2
αA
δf
δk
δk perm
δp
δv
δw
Md
Overall height of Slewing Ring
Gear ratio
Diametral Pitch
Module
Tilting moment, including all occurring impactloads and required safety factors, calculated fromall axial and radial forces that cause the tiltingeffect
Equivalent tilting moment for determining theload point in the limiting load diagram
Friction torque of the Slewing Ring underoperating load in the installed state
Friction torque of the Slewing Ring, unloaded
Rotational speed of Slewing Ring
Number of mounting holes per bearing ring
Maximum rotational speed of Slewing Ring
Permissible rotational speed of Slewing Ring
Required static raceway safety
Existing static safety of radial raceway
Safety factor against tooth base fracture
Pinion addendum modification coefficient
Slewing Ring addendum modification coefficient
Number of pinion teeth
Number of Slewing Ring teeth (wheel)
Bolt tightening factor
Circumferential backlash of gearing
Tilting clearance increase
Maximum permissible tilting clearance increase
Maximum permissible flatness deviation
Maximum permissible deformation of mountingstructure
Maximum permissible perpendicularity deviation
Gear torque at slewing ring
inch
—
1/inch
mm
ft-lbs
ft-lbs
ft-lbs
ft-lbs
rpm
—
rpm
rpm
—
—
—
—
—
—
—
—
inch
inch
inch
inch
inch
inch
ft-lbs
39
Function
Construction and function of a Slewing Ring
Slewing Rings consist of an internal (1) and external ring (2) andwith an integrated raceway system and optional internal or externaltoothing (3). A functional seal (4) protects the raceway system onthe upper and lower sides. Slewing Rings are designed for greaselubrication which is carried out via grease nipples (5).
In Slewing Rings, the rolling elements (6) carry the loads betweenthe inner and outer ring. The load capacity of the raceway systemis determined predominantly by the raceway design, the hardeningdepth, and the number and size of the rolling elements. Spacers (7)separate the rolling elements and minimise friction and wear. Therolling elements are inserted during manufacture through the fillingplug hole (8), retained by the filling plug which is then secured bya pin (9). The force is transmitted to the mounting structure by bolts.Through holes or threaded holes (10) can be provided in the innerand outer rings for these bolts.
Fax
Frad
MK
Figure 2
2
67
Load distributionDepending on external load, the load distribution and the contactangle around the rolling elements will vary.
In the case of axial load, all rolling elements are loaded in the samedirectionIn the case of radial load, a segment of the rolling elements carriesthe loadIn the case of tilting moment load, a segment on one side and asegment on the opposite side of the raceway carry the loadMostly, a combination of axial, radial and tilting moment loadsoccur (Fig. 2).
•
•
•
•
Figure 1
3
1
5
4
8
9
10
Technical Information
40
Radial loads must be transmitted by means of frictional contactbetween Slewing Ring and the attached mounting structure.
A good bolt connection is vital for satisfactory function of theSlewing Ring.
The bolt connection and tilting clearance of the Slewing Ring mustbe checked regularly.
•
•
•
Axial loads can be either “compressive” or “suspended”.
“Suspended” axial loads and the load on a rising segment in tiltingmoments must be adequately resisted by mounting bolts (Fig. 3).Note: Catalog bolt data is not valid in this case!
•
•
GearOur standard Slewing Rings are designed with spur gears.Permissible torques are specified in the Slewing Ring tables.
SealingPolymer seals protect the Slewing Rings from normal dirt penetration,dust and light sprayed water. For very dirty and wet environments,the seals shall be protected by pre-mounted labyrinth or additionalseals on the mounting structure. Performance and service life of theSlewing Ring depends strongly on preventing ingress of contaminentsinto the Slewing Ring.
Pressure washing must not be used to clean Slewing Rings.
Operating temperatureStandard IMO Slewing Rings can be used in ambient temperaturesfrom -13°F up to 158°F. Please contact us in the case of higher orlower operating temperatures.
All catalog bolt data is valid only for “compressive” loads asshown in Figure 4
“Compressive” loads
“Suspended” loads
Figure 3
Figure 4
Fax
Fax
Fax
Fax
Selection criteria
The following criteria must be considered for the correct selectionof a Slewing Ring.
Direction of rotational axisVertical: Slewing Rings of all series can be used.
Slewing Rings of all series can be used. The permissiblerotational speed has to be limited to half of the valueof the vertical rotational speed.
Here the same conditions apply as for a horizontalrotational axis.
Horizontal:
Alternating:
LoadsExternal forces such as axial loads, radial loads and tilting momentmust lie below the static limiting load curve, as regards their operatingload point. For this, please refer to the chapters “Static capacity ofraceway” and “Mounting bolts”.
Shocks, vibrationsTo account for the peculiarities of the different applications theshock factors for gears and the raceway system should be considered.
Torque / tooth forcesThe required torque must not exceed the maximum permissibletorques and tooth forces given in the Technical Information section.Explanations of the different torque specifications can be found inthe gear section on page 43.
Rotational speedThe following is a list of the maximum permissible rotational speedsnperm for the different series:
Lower permissible values apply for Slewing Rings in precision designsor those with reduced clearance. Please contact our EngineeringDepartment for assistance.
Series 116 Slewing Rings:
Series 120, 125, 150 and 920Slewing Rings:
With horizontal axis of rotation: 800da
nperm =
1600da
nperm =
3200da
nperm =
nperm
dain [rpm]in [in]
41
Duty
For continuous running or high duty applications it is essential tocheck the service life of the Slewing Ring and, if necessary, thegearing. Please contact our Engineering Department for assistance.
Static load capacity of raceway
Static load capacity of the Slewing Ring is determined by:
• Hardening depth of the raceway• Number and size of the rolling elements• Slewing Ring design• Raceway geometry
The limiting load diagram shows the permissible axial and tiltingmoment loads for the respective size unit. Each loading case includingthe required or recommended safety must lie below the limitingload line for the selected Slewing Ring.
Limiting load diagrams are valid under the following condition:
Static loadingLimiting load line with safety 1Bolt clamping length between 5 and 10 times the bolt diameterContinuous threads up to bolt head are not permissibleStrength of bolts according to grade 8All mounting holes used“Compressive” axial load (load applied according to fig. 5)Adequately stiff and level mounting structureMinimum strength of mounting structure >72500 psiRadial loading considered as specifiedCompliance with “Installation and Operating Manual”
•••••••••••
Figure 5
In the case of applications with higher duty factors or continuousrunning it is recommended that a calculation of service life is carriedout. Please contact our Engineering Department for assistance.
The application service factors and the required static safety S0 forthe existing loads are to be taken account of in the followingequations:
FaxD = Fax • fa • S0
To account for the prevailing radial load the tilting moment isincreased correspondingly, at the same time the radial componentsfrom the gearing are also to be taken into account.
FradD = (Frad + FradZ) • fa • S0
MkD = Mk • fa • S0 + 0.144 • FradD • da
FradZ = Fzcos 20°
Fax
Frad
MK
Application
Construction machinery
Forestry machinery
Foundries
Manlift platforms
Mech. engineering, general
Mech. engineering, general
Measuring technique
Robots / mech. handling sys.
Rail vehicles
Special vehicles
Deep mining
Shipboard cranes
Cranes
Cranes
Stackers & attachments
Wind power turbines
Machine tools
Application service factor fa
1.25
1.50
1.75
1.30
1.25
1.50
2.00
1.50
1.50
1.50
1.75
1.10
1.25
1.45
1.10
2.00
1.50
Remarks
Normal operation
Rough operation
Rough operation
Normal operation
Normal operation
Heavy operation
Precision required
Precision required
Rough operation
Rough operation
Rough operation
Normal operation
Average operation
Heavy operation
Light shocks
Risk of false brinelling
Precision required
Table 1: Application service factors
+ 0.046 • Fax
This equation applies only if:
(Frad + FradZ) 2,4 •Mkda
To address the peculiarities of different applications, the followingapplication service factors are to be considered with respect to theoperating conditions:(Note, these factors may be superseded by customer specification,FEM classifications, calculation or design regulations by certifyingauthorities.)
Equivalent Axial Force
Radial force from gearing circumferential force
Equivalent Radial Force
Equivalent Tilting Moment
daMF
in [ft-lbs]in [in]
in [lbs]
42
Technical Information
Should the value be exceeded, the limiting load diagram no longerapplies.Please contact our Engineering Department for assistance.
Mounting boltsPrevailing loads must be safely transmitted. To ensure this, mountingbolts should be sized to handle the raceway loading. The bolt curveis depicted in the static limiting load diagram subject to the followingconditions:
Static load carrying capacity of the mounting bolts
Determining the operation load level, both with and without radialload, occurs along with the verification of the static load carryingcapacity of the raceway.
If the prevailing load case lies below the limiting load line in thestatic limiting load diagram then the bolted connection is staticallyadequately dimensioned.
Dynamic load carrying capacity of the mounting bolts
Mostly, static dimensioning of a mounting bolt is sufficient.In cases where very high numbers of stress reversals act on theSlewing Ring, dynamic verification is necessary. Please contact ourEngineering Department for assistance.
Frictional capability of bolt connection
When radial loads act on the Slewing Ring, it must be ensured thatthese loads can be transmitted without shearing forces occurringin the bolts. Therefore, it must be determined whether the radialload can be transmitted via frictional contact between the mountingstructure and the Slewing Ring.
•
•
•
•
•
•
Quote the fulfillment of the conditions in the case of consideringthe static load capacity of the raceway.The limiting load diagram is applicable for “compressive” loads(see Fig. 4).In the case of “suspended” loads, the bolts are subject to additionaltensional forces. Please contact our Engineering Department forassistance.The bolts of strength grade 8 are tightened according to specificationwith a torque wrench (αA = 1.6). You can find the tighteningtorques in our Installation and Operating Manual. If there are otherconditions please talk to our Engineering Department.Bolts above M30 should be tightened with an hydraulic tighteningdevice to 85% of the yield point. Details on this can be found inour Installation and Operating Manual.For Slewing Rings with through holes, use the largest possiblemetric bolts with regular threads.
If the prevailing radial load exceeds the limit value, please contactour Engineering Department for assistance.
Frad max =nb • Fsp
18.8If the operating load point lies below the limiting load line then theSlewing Ring is statically adequately dimensioned. If loads frequentlyoccur during the slewing process, the selected type should be re-evaluated dynamically for service life. Please contact our EngineeringDepartment for assistance.
Calculation example:
Application:
Load:
Slewing equipment for a construction machineunder normal operation, no additional safety factorS0 ( S0 = 1) is required.
Axial loadRadial loadTilting moment load
360001300
88500
Slewing Ring: pre-selected series 120Type 10-20 0941 / 0-02062
The following values are achieved with an application servicefactor of 1.25:
FaxD = 36000 lbs • 1.25 = 45000 lbs
FradD = 1300 lbs • 1.25 = 1630 lbs
At this point it can be verified in the limiting load diagram, whetheror not the pre-selected Slewing Ring is statically adequate.
Limiting load diagram,Series 120
MkD = 88500 • 1.25 + 0.144 • 1630 • 37.1
lbslbsft-lbs
= 119333 ft-lbs
175
150
125
100
75
50
25
0
50 100 150 200 250 300 3500
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]
Equivalent axial load [lbs x 1000]
Permissible zone
Operating load point
45
119.3
Bolt curve
Raceway curve
Unpermissible zone
Fnb
in [lbs]in [-]
43
For Slewing Rings with a different number or size of the bolts in theinner and outer ring, the permissible radial load is to be determinedfor both rings. The smaller value is the limiting value.
Friction contact prevails if Frad max is greater than the prevailing radialload.
Securing the mounting bolts
When a customer desires that the mounting bolts shall be secured,we recommend the following products (manufacturer specificationis valid):
Loctite ®Application of Loctite 270 is suitable for the highest level ofconnections. This prevents loosening and provides thread sealing.Please observe the instructions and requirements of the manufacturerwhen using this product.
Nord-Lock ®Nord-Lock, self-locking washers, are recommended for cases ofvibration or dynamic loading cycles.Due to a pair of square tapered washers with tapered surfacegradients between both Nord-Lock securing washers greater thanthe gradient of the bolt threads, any loosening tendency of the boltis immediately prevented.Please observe the instructions and requirements of the manufacturerwhen using this product.
Other bolt securing systems are not approved.
Friction torque
The friction torque of Slewing Rings depends upon many influencefactors, such as:
• Rigidity and flatness of the mounting structure• Load and loading combination• Rotational speed and operating temperature• Design of raceway system• Number and frictional torque of seals• Lubrication grease and filling level• Manufacturing tolerances• Other factors
The friction torque for a Slewing Ring under load can be determinedwith the following equation, approximately:
Mw = 10-3 • (22 • Mk + 1,67 • da • Frad + 0,42 • da • Fax) + MwA
Gear
Gearing designSlewing Rings can optionally be selected with spur gears conformingwith DIN 3960, DIN 3962 and AGMA. The toothing is eithernormalized or quenched and tempered according to the SlewingRing series. If higher torques or longer service life are requiredtoothing is available in the quenched and tempered or hardenedcondition.
Permissible tooth forces fz norm and fz maxThe data is available in the Technical Information section and definedas the gearing circumferential force and refer to the tooth base. Thevalues for fz max are calculated with a safety factor against fractureof 2, the values for fz norm are calculated with SF=1 with respect tothe tooth base fatigue. The pinion is thereby taken into account ashardened and grounded with z1=17 and x1=0.5.In the Series 120 and 920 the safety factor against fracture is 1.5and the values for fz norm are determined with SF=0.85 and aretherefore in the fatigue strength range.In the case of standard single-sided pinion bearings the static safetyfactor should not be less than1.5. If a pinion with fewer teeth andwith addendum modification coefficient is used, please contact ourEngineering Department for assistance.
The required gearing circumferential force can be determined fromthe existing or the required torque:
According to whether Fz is calculated from the torque at the SlewingRing or the pinion, the corresponding number of teeth and thecorresponding friction torque must be used.
If more detailed calculations such as service life etc. are neededplease contact our Engineering Department for assistance.MwA = 0,048 • da2
MwA = 0,476 • da2
Fz = 24Md • Pd
z
Slewing Rings in the Series 116, 120, 125, 150 and 920 withpreloaded raceways
M in [ft-lbs]da in [in]
The friction torque of an unloaded Slewing Ring can be determinedapproximately with the following equations:
Slewing Rings in the Series 116, 120, 125, 150 and 920 withminimum clearance greater than zero
MPd
F
daMF
in [ft-lbs]in [in]
in [lbs]
in [ft-lbs]in [1/in]
in [lbs]
44
Technical Information
Lubrication
To ensure flawless operation and a long usable life, adequate andregular lubrication is necessary. The grease fulfills the followingfunctions:
For the raceway:
• Reduction of friction and wear in the rolling contacts• Corrosion protection• Lubrication of seals• Additional sealing effect of grease collar• Low friction torque
For the gears:
• Smoother running• Lower wear• Reduced operating noise• Longer useful life• Lower heat development
Initial greasing
IMO Slewing Rings are supplied pre-lubricated. High-quality lithium-complex grease, based on mineral oil, with EP - additives accordingto DIN 51825, KP2P-20 is the standard lubricant.
Regreasing intervals
Regreasing must be done at regular intervals, depending on frequencyof use and ambient operating conditions. General attention mustbe payed to ensure that the grease used during the greasing iscompatible with the sealing material. Special attention should bepaid to ensure that lubricating grease types originally specified areused throughout the life of the unit.Should you wish to use other types of grease, it must be verifiedwhether the grease is compatible with that used for initial greasing.Please contact your grease manufacturer.Please observe also the data in the”Installation and OperatingManual“ chapter.
Beside regular regreasing during operation, it is also necessary togrease the Slewing Rings before and after long inactive periods.Equally important is to regrease the equipment after cleaning.
Attention:Slewing Rings must not be cleaned with pressure washingequipment. During pressure washing, large amounts ofpressurized water can penetrate into the Slewing Ring throughthe sealing gap and cannot be removed, even by massiveregreasing. This will strongly reduce the usable service life ofa Slewing Ring.
Mixing greases
Greases with different thickeners and / or base oils should generallynot be mixed. The manufacturer should always confirm if differentgrease types can be mixed.
Drive pinion
The permissible tooth forces (gearing circumferential force) havebeen determined with a pinion with z1=17 and x1=0.5. If no specialrequirements exist with respect to the gear ratio the drive pinioncan be designed with this gear data. The width of the pinion teethshould also be more than the teeth on the Slewing Ring. Thedifference between teeth widths should be approximately equal tothe module.If less than 17 teeth are used for the pinion, the gearing should bechecked by calculations. The recommended gear quality for thepinion is 8e26 or better. In the case of very high tooth forces werecommend a pinion tip relief and a wide crown design, pleasecontact our Engineering Department for assistance.
Tooth backlash
The tooth backlash is set at the highest point of the gear. It dependson the module of the gear and is calculated according to the followingequation:
Tooth backlash to be set
For setting the circumferential backlash, the tooth zone with therun-out 'high point' is marked with green. The backlash is to be setat this point.
Shock coefficient
As for the applications in which impact is expected, the appropriateimpact coefficients must be considered when determining the SlewingRings`maximum torque rating.
Service life
The service life of the gear depends on the operating conditions. Thefollowing factors are key:
• Torque• Output speed• Duty factor• Ambient temperature• Lubrication etc.
Drive power
In principle the drive should be dimensioned conservatively. Thefriction torque of a Slewing Ring can have a wide spread due to theload combination and magnitude, the design of the mountingstructure, the raceway clearance and many other factors.
If the required drive torque is determined from the friction torqueof the Slewing Ring it is necessary to start with twice the calculatedvalue for the design of the drive power. Similarly additions shouldbe made for the accelerating and decelerating of the moved massesand for any further power requirements according to the application.
δf = 0.03 to 0.04 •1Pd Pd
δfin [1/in]in [in]
45
Shelf life of lubricants
Lubricants are subject to ageing even if unused. If after about 3years grease is not yet used, it should be replaced.
Design of mounting structure
Safe transmission of application loads and reliable operation ofSlewing Rings is achieved, along with other factors, through usingadequately designed mounting structures. To ensure safe operationof Slewing Rings, there are certain minimum requirements to themounting structure:
• Sufficient rigidity (see Installation and Operating Manual)• Maintain flatness according to Installation and Operating Manual• No hard points (e.g. through cross beams)• Bolting surfaces must be machined flat• A hollow mounting structure is preferred• Use all mounting bolts• Bolts of recommended strength should be used• Minimum strength of attached structure >72500 psi
Very different mounting structure solutions can be used, dependingupon maximum load and application. If a hollow mounting structureis intended flange thickness should be at least 50% of the overallSlewing Ring height. The thickness of the hollow mounting structureshould be about 1/3 of the flange thickness. For weight-criticalapplications, flange thickness can only be reduced if appropriatestiffening ribs are provided and specifications on permissible flatness,perpendicularity deviations and deformation under load are achieved.Values on this are specified in the “Installation and OperatingManual”.
H
min. H6
min
.H 2
min
.H 2
min. H6
You will find a detailed procedure on the following pages!
Start• Load data determined• Rotational speed known• Tooth forces calculated• Application factors selected
Selectioncompleted Yes
Are all valuesin the
permissiblerange
No
We recommend that the Slewing Ring selection is checked at IMO.Please fill in the Application Data sheet on pages 60/61 and provide a sketch of the application.46
A few simple steps for selecting a Slewing Ring
6000
5000
4000
3000
2000
1000
01000 2000 3000 4000 5000 6000 7000
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]
Equivalent axial load [lbs x 1000]
0
Position 1
34
2
5
Checking of the racewayand bolt connection
Checking of gearing
Selecting a design
47
Robust design
Rough mounting structure
Vibrations
High load capacity
High service life
Reduced clearance
Low friction torque under load
Uniform friction torque under load
High rotational speed
Small diameter
Large diameter
High axial load
High tilting moment load
High precision
High rigidity
Series
Requirement
Selection list for optimum series
920 120 116 150
++
++
––
–
–
++
–
–
–
–
125
++
+
+
++
++
–
+
+
+
+
+
+
++
+
+
+
+
+
+
+
+
+
+
++
+
+
–
–
++
++
++
–
–
–
++
++
+
++
++
No liability
Special design
++2)
++2)
++2)
++2)
++2)
++2)
++2)
++2)
++2)
++2)
++2)
++2)
++2)
11-50 1900/2-06400
11-50 2130/2-06410
11-50 2355/2-06420
11-50 2645/2-06430
84.220
93.732
102.551
113.890
74.724
83.780
92.638
104.055
74.882
83.937
92.795
104.213
1808
2053
2258
2518
78.937
87.992
96.850
108.268
70.669
79.724
85.583
100.000
36
48
54
60
82.677
91.969
100.787
112.126
14
16
16
16
150
146
160
178
29675
34845
34845
34845
51481
61373
61373
61373
747040
837413
925763
1039741
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da La Li n do z2 fz norm fz max Co rad Co ax C rad C ax
[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [mm] [lbs] [lbs] [lbs] [lbs] [lbs] [lbs]Dr
awin
g nu
mbe
r
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Pitch
circl
e di
amet
er,in
ner r
ing
Num
bers
of h
oles
per p
itch
circle
Pitch
circl
e di
amet
er
Mod
ule
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
Stat
ic
Dyna
mic
68.071
77.126
85.984
97.402
[ - ]
1998776
2240896
2477395
2782685
253809
264600
274941
287531
295624
308213
320353
334965
1
2
3
4
Posit
ion
+0.50
+0.50
+0.50
+0.50
x2
Adde
ndum
mod
ificat
ion
coef
f.
[ - ]mG
48
Technical Information
Step 5: Static checking of gearing
A check should be made using the maximum expected tooth forceto see whether the gearing has been adequately dimensioned. Ifthe existing maximum tooth force has been determined from thefriction torque under the maximum load, then this value must bedoubled before comparison with the value in the table. If thecorresponding masses are accelerated or decelerated the respectivetorques must also be taken into account.
If all the values for the selected Slewing Ring are in thepermissible zone the Slewing Ring can be used. Finally, wewould strongly recommend that your choice is confirmed byour Engineering Department.
In the case of high duty cycles or continuous running werecommend that a service life calculation is carried out by ourEngineering Department.
The correct Slewing Ring in 5 steps
Step 1: Determining the load
The first step is to determine the loads and rotational speeds. Hereit is necessary to consider both axial as well as radial loads and tiltingmoment loads. It is also important to take account of those loadswhich can result from extreme situations such as high wind loads,loads during assembly, possible tilting etc.
Furthermore shock factors and the necessary safety factors mustalso be taken into account.
Step 2: Determining the Size
One or the other series is better suited according to the application.To make the optimum choice the following table shall be used todetermine the suitable / adaptable size.
Step 3: Static checking of raceway
Using the static limiting load diagram a check must be made onwhether the existing forces including the safety factors to be useddo not exceed the permissible loads for the raceway.
The load, including the shock factors, the necessary safety factorsand the calculated radial load must be in the permissible zone ofthe raceway curve and the expected rotational speeds must bebelow the limit. If the load is above the curve then the next size upor a stronger series must be selected. If the expected rotationalspeed is above the limit then the next smaller size or another serieswith higher limits must be selected.
Step 4: Checking of bolt connection
In the same limiting load diagram a check should also be madewhether the load point is below the bolt curve. The load mustinclude the shock factors, the necessary safety factors and thecalculated radial load. If the load is above the curve then the nextsize up or a stronger series must be selected. In addition anexamination should be carried out with the equation on Page 42to check whether frictional contact is present.
Evaluation code
––
–
+
++
Less suitable / adaptable
Suitable / adaptable under certain conditions
Medium
Good
Very good
Robust design
Rough mounting structure
Vibrations
High load capacity
High service life
Reduced clearance
Low friction torque under load
Uniform friction torque under load
High rotational speed
Small diameter
Large diameter
High axial load
High tilting moment load
High precision
High rigidity
Series
Requirement
Selection list for optimum series
920 120 116 150
++
++
––
–
–
++
–
–
–
–
125
++
+
+
++
++
–
+
+
+
+
+
+
++
+
+
+
+
+
+
+
+
+
+
++
+
+
–
–
++
++
++
–
–
–
++
++
+
++
++
No liability
49
The permissible tooth force fz max is 57101 lbs and is thereforesignificantly above the existing tooth force Fz of 14000 lbs.
The permissible rotational speed for this type is:
and is significantly over the existing rotational speedof 1.3 rpm.
This concludes the examination and the selection should beconfirmed by IMO together with details of the loads.
Example:Application: Crane operating in medium conditionsLoad data:Axial loadRadial loadTilting momentTooth forceMax. rotational speed
Special requirements:Internal toothed design, no special precision required.Diameter range about 60 inchAdditional safety factor S0 = 1.1
From the table of fa values, fa = 1.25 for medium duty cranes,from this you get: Pre-selection - Series 125,Item 12-25 1455/1-03270 da = 57.205 inch
FaxFradMkFz maxn
= 73000= 10000= 341000= 14000= 1.3
lbslbsft-lbslbsrpm
Limiting load diagram, Series 125
According to the limiting load diagram the pre-selected typecannot be used. There is also no other usable Slewing Ring inthis series.The new pre-selection is type 12-50 1800/2-06500
Limiting load diagram, Series 150
The selected Slewing Ring 12-50 1800/2-06500 is in thepermissible zone.
Reading off the load point on the limiting load diagram.
5250
4500
3750
3000
2250
1500
750
0250 500 750 1000 1250 1500 17500
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]
Equivalent axial load [lbs x 1000]
Selected Type12-50 1800/2-06500
770
660
550
440
330
220
110
0100 200 300 400 500 600 7000
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]
Equivalent axial load [lbs x 1000]
Curve for 12-25 1455/1-03270
Load point for 12-25 1455/1-03270 not permissible!
FradD = (FradD + Fz/cos20°) • fa • So
= Fax • So • fa = 73000 lbs • 1.25 • 1.1 = 100375 lbs
= Mk • So • fa + 0.144 • FradD • da
= (10000 lbs + 14000 lbs/cos20°) • 1.25 • 1.1 = 34235 lbs
FaxD
MkD
= 341000 • 1.25 • 1.1 + 0.144 • 34235 • 57.205= 750886 ft-lbs
FradD = (FradD + Fz/cos20°) • fa • So
= (10000 lbs + 14000 lbs/cos20°) • 1.25 • 1.1
= Mk • So • fa + 0.144 • FradD • daMkD
= 341000 • 1.25 • 1.1 + 0.144 • 34235 • 70.945= 818622 ft-lbs
da = 70.945 inch
= Fax • So • fa = 73000 lbs • 1.25 • 1.1 = 100375 lbsFaxD
New calculation:
= 34235 lbs
nperm = 1600 =da
160070.945
= 22.6 rpm
50
Untoothed
Internal toothed
Series 920 standard design
External toothed
91-20 0311/1-37102
91-20 0413/1-37112
91-20 0541/1-37122
91-20 0641/1-37132
91-20 0741/1-37142
91-20 0841/1-37152
91-20 0941/1-37162
91-20 1091/1-37172
15.900
19.900
25.150
29.150
32.900
37.200
41.200
46.867
12.421
16.437
21.476
25.413
29.350
33.287
37.224
43.130
12.303
16.319
21.358
25.295
29.232
33.169
37.106
43.012
50
67
91
107
130
157
172
201
14.000
18.000
23.250
27.250
31.000
35.000
38.880
44.630
8
8
12
15
18
18
18
20
9.130
13.130
18.130
22.130
26.130
30.000
34.000
39.880
12
12
15
18
18
18
20
24
15.50
19.500
24.750
28.750
32.500
36.667
40.667
46.333
4
4
4
4
4
3
3
3
62
78
99
115
130
110
122
139
2540
2540
2540
2540
2540
3700
3700
3700
5800
5800
5800
5800
5800
7960
7960
7960
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da b La na Li ni do z2 fz norm fz max
[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [1/inch] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Pitch
circl
e di
amet
er
Diam
etra
l Pitc
h
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
Diam
eter,
inne
r rin
g
8.031
11.969
17.087
21.024
24.961
28.898
32.835
38.740
10.591
14.528
19.646
23.583
27.520
31.457
35.394
41.299
[ - ]
20008
26527
34845
41365
47659
54179
60474
70140
Co rad Co ax C rad C ax
[lbs] [lbs] [lbs] [lbs]
Stat
ic
Dyna
mic
46760
61822
81381
96443
111505
126567
141630
164111
31473
35070
38892
41365
43613
45861
47884
50357
31473
35070
39117
41590
43838
46086
48109
50582
1
2
3
4
5
6
7
8
Posit
ion
92-20 0311/1-37202
92-20 0413/1-37212
92-20 0541/1-37222
92-20 0641/1-37232
92-20 0741/1-37242
92-20 0841/1-37252
92-20 0941/1-37262
92-20 1091/1-37272
16.457
20.394
25.512
29.449
33.386
37.323
41.260
47.165
12.421
16.437
21.476
25.413
29.350
33.287
37.224
43.130
12.303
16.319
21.358
25.295
29.232
33.169
37.106
43.012
47
60
84
99
115
139
152
183
15.35
19.25
24.38
28.38
32.25
36.25
40.13
46.00
8
8
10
12
15
18
18
18
10.50
14.88
19.63
23.63
27.63
31.50
35.50
41.50
12
12
15
18
18
18
20
24
9.00
13.25
18.00
22.00
26.00
29.67
33.67
39.67
4
4
4
4
4
3
3
3
36
53
72
88
104
89
101
119
2830
2830
2830
2830
2830
4080
4080
4080
6290
6290
6290
6290
6290
8940
8940
8940
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da a La na Li ni do z2 fz norm fz max[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [1/inch] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Pitch
circl
e di
amet
er
Diam
etra
l Pitc
h
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
Diam
eter,
oute
r rin
g
8.350
12.850
17.600
21.600
25.600
29.133
33.133
39.133
13.898
17.835
22.953
26.890
30.827
34.764
38.701
44.606
[ - ]
1
2
3
4
5
6
7
8
Posit
ion
90-20 0311/0-37002
90-20 0413/0-37012
90-20 0541/0-37022
90-20 0641/0-37032
90-20 0741/0-37042
90-20 0841/0-37052
90-20 0941/0-37062
90-20 1091/0-37072
16.457
20.394
25.512
29.449
33.386
37.323
41.260
47.165
12.421
16.437
21.476
25.413
29.350
33.287
37.224
43.130
12.303
16.319
21.358
25.295
29.232
33.169
37.106
43.012
43
53
70
84
101
115
128
150
15.35
19.25
24.38
28.38
32.25
36.25
40.13
46.00
8
8
12
12
15
18
18
18
9.130
13.130
18.130
22.130
26.130
30.000
34.000
39.880
12
12
15
18
18
18
20
24
Load ratingsMounting holesDimensions and weight
Da di Di da b La na Li ni
[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [ - ]
20008
26527
34845
41365
47659
54179
60474
70140
Co rad
[lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Stat
ic
Dyna
mic
Diam
eter,
inne
r rin
g
8.031
11.969
17.087
21.024
24.961
28.898
32.835
38.740
10.591
14.528
19.646
23.583
27.520
31.457
35.394
41.299
Co ax
[lbs]
46760
61822
81381
96443
111505
126567
141630
164111
C rad
[lbs]
31473
35070
38892
41365
43613
45861
47884
50357
C ax
[lbs]
31473
35070
39117
41590
43838
46086
48109
50582
1
2
3
4
5
6
7
8
Posit
ion
a[inch]
Diam
eter,
oute
r rin
g
13.898
17.835
22.953
26.890
30.827
34.764
38.701
44.606
G
G
G
20008
26527
34845
41365
47659
54179
60474
70140
Co rad Co ax C rad C ax
[lbs] [lbs] [lbs] [lbs]
Stat
ic
Dyna
mic
46760
61822
81381
96443
111505
126567
141630
164111
31473
35070
38892
41365
43613
45861
47884
50357
31473
35070
39117
41590
43838
46086
48109
50582
Pd
Pd
51
Radial clearance: 0 - 0.012 inchAxial tilting clearance: 0 - 0.02 inchBearing ring material: C45NGear tooth form: 20-degree stub involute systemNecessary backlash at the pinion: 0 - 0.006 inch4 Taper type grease nipples on the circumferenceMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse
Design variants
If you require something different from the standard design, simply replacethe last digit of the corresponding drawing number as follows:
Standard design= Reduced clearance radial clearance: 0 - 0.004 inch axial tilting clearance: 0 - 0.008 inch= Bearing rings without holes= Double number of holes= Backlash-free bearing with preload
90-20 0311/0-0700 21
467
120
105
90
75
60
45
30
15
025 50 75 100 125 150 1750
12
34
56
7
8
da
bLi
di
Di
La
Da
a
0.47
2
1.73
2
ø0.688
0.47
2
2.20
51.73
2
ø0.688
Limiting load diagram for “compressive” loads - Series 920
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]
Equivalent axial load [lbs x 1000]
Raceway curveBolt curveBolt grade 8
Please adhere strictly to the rules given in the TechnicalInformation section when using above graph!
1.73
20.
750
Di
do
Da
La
da
bLi
diø0.688
1.73
22.
205
0.47
2
1/2-13 UNC-2B
1.73
22.
205
ø0.688
0.472
di
Li
da
do
Da
aDi
0.75
0 1.73
2
La
1/2-13 UNC-2B
Position
Characteristics• Robust design for rough mounting structure• Cost-optimized design• Ideally suitable for applications with low precision requirements• For Series 920 precision versions are available
52
Untoothed
Series 116 standard design
External toothed
11-16 0100/1-08100
11-16 0200/1-08110
11-16 0300/1-08120
11-16 0400/1-08130
11-16 0500/1-08140
7.087
11.024
14.961
18.898
22.835
4.055
7.992
11.929
15.866
19.803
3.819
7.756
11.693
15.630
19.567
11
20
30
40
49
5.512
9.449
13.386
17.323
21.260
6
12
20
24
28
2.362
6.299
10.236
14.173
18.110
6
12
20
24
28
6.772
10.709
14.646
18.583
22.520
4
4
4
4
4
43
68
93
118
143
2023
2068
2068
2113
2113
3597
3822
4002
4047
4159
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da La na Li ni do z2 fz norm fz max
[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [mm] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Pitch
circl
e di
amet
er
Mod
ule
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
1.575
5.512
9.449
13.386
17.323
[ - ]
1
2
3
4
5
Posit
ion
10-16 0100/0-08000
10-16 0200/0-08010
10-16 0300/0-08020
10-16 0400/0-08030
10-16 0500/0-08040
7.087
11.024
14.961
18.898
22.835
4.055
7.992
11.929
15.866
19.803
3.819
7.756
11.693
15.630
19.567
11
22
31
42
53
5.512
9.449
13.386
17.323
21.260
6
12
20
24
28
2.362
6.299
10.236
14.173
18.110
6
12
20
24
28
Load ratingsMounting holesDimensions and weight
Da di Di da La na Li ni
[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
1.575
5.512
9.449
13.386
17.323
11456
22706
34171
45636
56877
Co rad Co ax C rad C ax
[lbs] [lbs] [lbs] [lbs]
Stat
ic
Dyna
mic
23155
46535
69691
93071
116226
15961
22256
26303
29225
31923
13713
19109
22706
25179
27427
1
2
3
4
5
Posit
ion
m
G
G
11456
22706
34171
45636
56877
Co rad Co ax C rad C ax
[lbs] [lbs] [lbs] [lbs]
Stat
ic
Dyna
mic
23155
46535
69691
93071
116226
15961
22256
26303
29225
31923
13713
19109
22706
25179
27427
53
Radial clearance: 0 - 0.008 inchAxial tilting clearance: 0 - 0.016 inchBearing ring material: C45N1 Taper type grease nipple, form C in filling plugMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse
45.0
37.5
30.0
22.5
15.0
7.5
012.5 25.0 37.5 50.0 62.5 75.0 87.50
1
2
3
4
5
Position
Li
di
da
ø0.433
Di
La
Da
M10x1.5
1.18
1
1.18
11.
378
Limiting load diagram for “compressive” loads - Series 116
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]
1.18
1
Di
La
Da
Li
di
da
ø0.433
1.18
11.
378
do
M10x1.5
Equivalent axial load [lbs x 1000]
Raceway curveBolt curveBolt grade 8
Please adhere strictly to the rules given in the TechnicalInformation section when using above graph!
Characteristics• Robust design• Insensitive to vibrations• Cost-optimized design• Medium precision• For Series 116 & 120 precision versions are available
54
Untoothed
Internal toothed
Series 120 standard design
External toothed
11-20 0311/1-32102
11-20 0413/1-32112
11-20 0541/1-32122
11-20 0641/1-32132
11-20 0741/1-32142
11-20 0841/1-32152
11-20 0941/1-32162
11-20 1091/1-32172
15.900
19.900
25.150
29.150
32.900
37.200
41.200
46.867
12.421
16.437
21.476
25.413
29.350
33.287
37.224
43.130
12.303
16.319
21.358
25.295
29.232
33.169
37.106
43.012
51
71
95
115
128
157
170
198
14.000
18.000
23.250
27.250
31.000
35.000
38.880
44.630
14
14
18
20
24
28
28
32
9.500
13.500
18.500
22.500
26.500
30.500
34.380
40.250
12
12
15
18
18
20
20
24
15.500
19.500
24.750
28.750
32.500
36.667
40.667
46.333
4
4
4
4
4
3
3
3
62
78
99
115
130
110
122
139
2540
2540
2540
2540
2540
3700
3700
3700
5800
5800
5800
5800
5800
7960
7960
7960
43163
57101
75086
88800
102738
116676
130389
151296
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da La na Li ni do z2 fz norm fz max Co rad Co ax C rad C ax
[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [1/inch] [lbs] [lbs] [lbs] [lbs] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Pitch
circl
e di
amet
er
Diam
etra
l Pitc
h
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
Stat
ic
Dyna
mic
7.500
12.000
17.000
21.000
25.000
28.830
32.830
38.750
[ - ]
100714
133087
175351
207723
240043
272468
304841
353400
31473
35070
38892
41365
43613
45861
47884
50357
31473
35070
39117
41590
43838
46086
48109
50582
1
2
3
4
5
6
7
8
Posit
ion
12-20 0311/1-32202
12-20 0413/1-32212
12-20 0541/1-32222
12-20 0641/1-32232
12-20 0741/1-32242
12-20 0841/1-32252
12-20 0941/1-32262
12-20 1091/1-32272
17.000
20.400
25.500
29.500
33.400
37.400
41.250
47.180
12.421
16.437
21.476
25.413
29.350
33.287
37.224
43.130
12.303
16.319
21.358
25.295
29.232
33.169
37.106
43.012
49
68
95
110
126
152
165
201
15.000
19.000
24.000
28.000
32.000
35.750
39.750
45.620
8
8
12
15
15
18
18
20
10.500
14.880
19.630
23.630
27.630
31.500
35.500
41.500
16
16
20
24
28
30
32
36
9.000
13.250
18.000
22.000
26.000
29.667
33.667
39.667
4
4
4
4
4
3
3
3
36
53
72
88
104
89
101
119
2830
2830
2830
2830
2830
4080
4080
4080
6290
6290
6290
6290
6290
8940
8940
8940
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da La na Li ni do z2 fz norm fz max[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [1/inch] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Pitch
circl
e di
amet
er
Diam
etra
l Pitc
h
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
8.350
12.850
17.600
21.600
25.600
29.133
33.133
39.133
[ - ]
1
2
3
4
5
6
7
8
Posit
ion
10-20 0311/0-32002
10-20 0413/0-32012
10-20 0541/0-32022
10-20 0641/0-32032
10-20 0741/0-32042
10-20 0841/0-32052
10-20 0941/0-32062
10-20 1091/0-32072
17.000
20.400
25.500
29.500
33.400
37.400
41.250
47.180
12.421
16.437
21.476
25.413
29.350
33.287
37.224
43.130
12.303
16.319
21.358
25.295
29.232
33.169
37.106
43.012
46
64
82
97
115
130
146
170
15.000
19.000
24.000
28.000
32.000
35.750
39.750
45.620
8
8
12
15
15
18
18
20
9.500
13.500
18.500
22.500
26.500
30.500
34.380
40.250
12
12
15
18
18
20
20
24
43163
57101
75086
88800
102738
116676
130389
151296
Load ratingsMounting holesDimensions and weight
Da di Di da La na Li ni Co rad Co ax C rad C ax
[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [lbs] [lbs] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Stat
ic
Dyna
mic
7.500
12.000
17.000
21.000
25.000
28.830
32.830
38.750
100714
133087
175351
207723
240096
272468
304841
353400
31473
35070
38892
41365
43613
45861
47884
50357
31473
35070
39117
41590
43838
46086
48109
50582
1
2
3
4
5
6
7
8
Posit
ion
Pd
Pd
G
G
G
43163
57101
75086
88800
102738
116676
130389
151296
Co rad Co ax C rad C ax
[lbs] [lbs] [lbs] [lbs]
Stat
ic
Dyna
mic
100714
133087
175351
207723
240043
272468
304841
353400
31473
35070
38892
41365
43613
45861
47884
50357
31473
35070
39117
41590
43838
46086
48109
50582 55
Radial clearance: 0 - 0.012 inchAxial clearance: 0 - 0.02 inchBearing ring material: C45NGear tooth form: 20-degree stub involute systemNecessary backlash at the pinion: 0 - 0.006 inch4 Taper type grease nipples on circumferenceMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse
175
150
125
100
75
50
25
0
50 100 150 200 250 300 3500
34
6
8
21Position
1.73
20.
75
1/2-13 UNC-2B Di
do
Da
La
da
Li
di
1.73
22.
205
ø0.688
Da
Di
La
di
Li
da
do
0.75
1.73
2
ø0.688
1.73
22.
205
da
Li
di
2.20
51.73
2
Di
La
Da
1.73
2
ø0.688
ø0.688
Limiting load diagram for “compressive” loads - Series 120
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]
Equivalent axial load [lbs x 1000]
Raceway curveBolt curveBolt grade 8
Please adhere strictly to the rules given in the TechnicalInformation section when using above graph!
1/2-13 UNC-2B
5
7
Characteristics• Robust design• Insensitive to vibrations• Cost-optimized design• Medium precision• For Series 116 & 120 precision versions are available
56
Untoothed
Internal toothed
Series 125 standard design
External toothed
11-25 0455/1-0411011-25 0555/1-0412011-25 0655/1-0413011-25 0755/1-0414011-25 0855/1-0311011-25 0955/1-0312011-25 1055/1-0313011-25 1155/1-0314011-25 1255/1-0315011-25 1355/1-0316011-25 1455/1-03170
17.99221.92925.86629.80333.74037.67741.61445.55149.48853.42557.362
17.83521.77225.70929.64633.58337.52041.45745.39449.33153.26857.205
163205245276320342377410443481514
20.31524.25228.18932.12636.06340.00043.93747.87451.81155.74859.685
1820242428303036424248
15.55119.48823.42527.36231.29935.23639.17343.11047.04750.98454.921
1820242428303036424248
22.67726.77230.86634.72438.62242.52046.45750.39454.33158.26862.205
888999
1010101010
72859898
109120118128138148158
62956295629580938093809396679667966796679667
1169011690116901461314613146131708517085170851708517085
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da La na Li ni do z2 fz norm fz max
[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [mm] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Pitch
circl
e di
amet
er
Mod
ule
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
13.97617.91321.85025.78729.72433.66137.59841.53545.47249.40953.346
[ - ]
123456789
1011
Posit
ion
12-25 0455/1-0421012-25 0555/1-0422012-25 0655/1-0423012-25 0755/1-0424012-25 0855/1-0321012-25 0955/1-0322012-25 1055/1-0323012-25 1155/1-0324012-25 1255/1-0325012-25 1355/1-0326012-25 1455/1-03270
21.85025.78729.72433.66137.59841.53545.47249.40953.34657.28361.220
17.99221.92925.86629.80333.74037.67741.61445.55149.48853.42557.362
17.83521.77225.70929.64633.58337.52041.45745.39449.33153.26857.205
141168225262302328364397430467500
20.27624.21328.15032.08736.02439.96143.89847.83551.77255.70959.646
1820242428303036424248
15.51219.44923.38627.32331.26035.19739.13443.07147.00850.94554.882
1820242428303036424248
12.59817.00820.78724.80328.74032.67736.61440.55144.48848.42552.362
888
1010101010101010
40546663738393
103113123133
719471947194
1056610566105661056610566105661056610566
1438814388143881933419334193341933419334193341933419334
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da La na Li ni do z2 fz norm fz max[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [inch] [mm] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Pitch
circl
e di
amet
er
Mod
ule
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
11.96916.37820.15724.01627.95331.89035.82739.76443.70147.63851.575
[ - ]
123456789
1011
Posit
ion
10-25 0455/0-0401010-25 0555/0-0402010-25 0655/0-0403010-25 0755/0-0404010-25 0855/0-0301010-25 0955/0-0302010-25 1055/0-0303010-25 1155/0-0304010-25 1255/0-0305010-25 1355/0-0306010-25 1455/0-03070
21.85025.78729.72433.66137.59841.53545.47249.40953.34657.28361.220
17.99221.92925.86629.80333.74037.67741.61445.55149.48853.42557.362
17.83521.77225.70929.64633.58337.52041.45745.39449.33153.26857.205
117143168198223254282306331359384
20.27624.21328.15032.08736.02439.96143.89847.83551.77255.70959.646
1820242428303036424248
15.55119.48823.42527.36231.29935.23639.17343.11047.04750.98454.921
1820242428303036424248
101838124319146800169056191537214018236274258755278763303492325973
Load ratingsMounting holesDimensions and weight
Da di Di da La na Li ni Co rad Co ax C rad C ax
[inch] [lb][inch] [inch] [inch] [inch] [ - ] [inch] [ - ] [lbs] [lbs] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Num
ber o
f hol
es,
oute
r rin
g
Pitch
circl
e di
amet
er,in
ner r
ing
Num
ber o
f hol
es,
inne
r rin
g
Stat
ic
Dyna
mic
13.97617.91321.85025.78729.72433.66137.59841.53545.47249.40953.346
272693332717392516452540512564572364632388692412752211812235872034
5597760249638466744371040737377643578908818308407986102
64970699167441278458825058587789024919479531997792
100490
123456789
1011
Posit
ion
m
m
23.24427.33931.43335.35439.25243.15047.16551.10255.03958.97662.913
G
G
G
101838124319146800169056191537214018236274258755278763303492325973
Co rad Co ax C rad C ax
[lbs] [lbs] [lbs] [lbs]
Stat
ic
Dyna
mic
272693332717392516452540512564572364632388692412752211812235872034
5597760249638466744371040737377643578908818308407986102
64,970699167441278458825058587789024919479531997792
100490
101838124319146800169056191537214018236274258755278763303492325973
Co rad Co ax C rad C ax
[lbs] [lbs] [lbs] [lbs]
Stat
ic
Dyna
mic
272693332717392516452540512564572364632388692412752211812235872034
5597760249638466744371040737377643578908818308407986102
64970699167441278458825058587789024919479531997792
100490
Radial clearance: 0 - 0.01 inchAxial clearance: 0 - 0.016 inchBearing ring material: C45N4 Taper type grease nipples on circumferenceMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse
280
240
200
160
120
80
40
040 80 120 160 200 240 2800
4
770
660
550
440
330
220
110
0100 200 300 400 500 600 7000
1Position
2
3
5
87
9
10
11
Da
Di
La
di
Li
da
do
1.57
5
ø0.866
2.12
6
M20 x2.5
2.79
53.
150
1.57
5
M20 x 2.5 Di
do
Da
La
2.12
6
ø0.866
da
Li
di
2.79
5
3.15
0
2.12
6
Di
La
Da
da
Li
diø0.866
2.12
62.
480
Limiting load diagram for “compressive” loads - Series 125
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]Eq
uiva
lent t
ilting
mom
ent [
ft-lb
s x 1
000]
57
6Position
M20 x 2.5
Equivalent axial load [lbs x 1000]
Raceway curveBolt curveBolt grade 8
Please adhere strictly to the rules given in the TechnicalInformation section when using above graph!
Equivalent axial load [lbs x 1000]
Raceway curveBolt curveBolt grade 8
Please adhere strictly to the rules given in the TechnicalInformation section when using above graph!
58
Internal toothed
External toothed
Series 150 standard design
11-50 1900/2-06400
11-50 2130/2-06410
11-50 2355/2-06420
11-50 2645/2-06430
84.220
93.732
102.551
113.890
74.724
83.780
92.638
104.055
74.882
83.937
92.795
104.213
1808
2053
2258
2518
78.937
87.992
96.850
108.268
70.669
79.724
85.583
100.000
36
48
54
60
82.677
91.969
100.787
112.126
14
16
16
16
150
146
160
178
29675
34845
34845
34845
51481
61373
61373
61373
747040
837413
925763
1039741
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da La Li n do z2 fz norm fz max Co rad Co ax C rad C ax
[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [mm] [lbs] [lbs] [lbs] [lbs] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Pitch
circl
e di
amet
er,in
ner r
ing
Num
bers
of h
oles
per p
itch
circle
Pitch
circl
e di
amet
er
Mod
ule
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
Stat
ic
Dyna
mic
68.071
77.126
85.984
97.402
[ - ]
1998776
2240896
2477395
2782685
253809
264600
274941
287531
295624
308213
320353
334965
1
2
3
4
Posit
ion
+0.50
+0.50
+0.50
+0.50
x2
Adde
ndum
mod
ificat
ion
coef
f.
[ - ]
12-50 1800/2-06500
12-50 2000/2-06510
12-50 2240/2-06520
12-50 2490/2-06530
12-50 2800/2-06540
77.598
85.472
94.921
104.764
116.969
70.787
78.661
88.110
97.953
110.157
70.945
78.819
88.268
98.110
110.315
1680
1858
2119
2321
2657
75.000
82.874
92.323
102.165
114.370
66.732
74.606
84.055
93.898
106.102
36
40
48
54
60
61.732
70.000
78.740
88.819
100.787
14
14
16
16
16
112
127
125
141
160
31698
31698
37318
37318
37318
57101
57101
65195
65195
65195
Load ratingsGearing and tooth forcesMounting holesDimensions and weight
Da di Di da La Li n do z2 fz norm fz max
[inch] [lb][inch] [inch] [inch] [inch] [inch] [ - ] [inch] [mm] [lbs] [lbs]
Draw
ing
num
ber
Outsi
de d
iamet
er,ou
ter r
ing
Insid
e di
amet
er,in
ner r
ing
Insid
e di
amet
er,ou
ter r
ing
Outsi
de d
iamet
er,in
ner r
ing
Weig
ht
Pitch
circl
e di
amet
er,ou
ter r
ing
Pitch
circl
e di
amet
er,in
ner r
ing
Num
bers
of h
oles
per p
itch
circle
Pitch
circl
e di
amet
er
Mod
ule
Num
ber o
f tee
th
Perm
issib
leto
oth
force
Max
imum
per
miss
ible
toot
h fo
rce
61.181
69.449
78.110
88.189
100.157
[ - ]
5
6
7
8
9
Posit
ion
-0.50
-0.50
-0.50
-0.50
-0.50
x2
Adde
ndum
mod
ificat
ion
coef
f.
[ - ]m
mG
G
707699
777165
880577
978818
1100665
Co rad Co ax C rad C ax
[lbs] [lbs] [lbs] [lbs]
Stat
ic
Dyna
mic
1893566
2103987
2356447
2619474
2945672
248414
259205
269321
281011
292476
289104
301918
313608
282360
430810
59
Radial clearance: 0 - 0.016 inchAxial clearance: 0 - 0.03 inchBearing ring material: 42CrMo4V9 to 12 Taper type grease nipples on circumferenceMounting holes equally spacedRaceway system supplied pre-lubricatedDimensions without tolerances DIN ISO 2768 coarse
5250
4500
3750
3000
2250
1500
750
0250 500 750 1000 1250 1500 17500
5250
4500
3750
3000
2250
1500
750
0250 500 750 1000 1250 1500 17500
6
7
9
4
1Position
2
3
5Position
8
3.93
7
Di
do
Da
La
da
Li
di
ø1.299
3.89
84.
291
ø1.299
3.89
8
ø1.299 di
Li
da
do
Da
Di
La
ø1.299
3.93
74.
291
Limiting load diagram for “compressive” loads - Series 150
Equi
valen
t tilti
ng m
omen
t [ft-
lbs x
100
0]Eq
uiva
lent t
ilting
mom
ent [
ft-lb
s x 1
000]
Equivalent axial load [lbs x 1000]
Raceway curveBolt curveBolt grade 8
Please adhere strictly to the rules given in the TechnicalInformation section when using above graph!
Equivalent axial load [lbs x 1000]
Raceway curveBolt curveBolt grade 8
Please adhere strictly to the rules given in the TechnicalInformation section when using above graph!
Please copy, fill in and send to:McQueen Park, Summerville, South Carolina 29483, USA, Tel. +1 843 695-6200
Alternatively, you can fill in this sheet online atwww.goimo.com
2. Application description (please attach additional sketch):
Exchangeable with existing solution:
New Application:
Position of rotation axis:
Type of load:
No Yes
No Yes
Vertical HorizontalInclined/Changing
If yes: what should be considered? Replacement for: pls fill in below!
“Compressive”axial load
“Suspended”axial load
Degrees Middle position of rotation axis
Degrees Angle range±β
α
Company:
Contact person:
Address:
City:
Zip Code:
1. Contact:Homepage:
Email:
Phone:
Fax:
IMO USA Corp., 101 Innovation Drive
Vertical
Middle position ofrotation axis
3. Gearing
which ring is with gear?
Module
Diametral Pitch
Number of teeth
Width of teeth
Addendum modification coeff.
noneinternal external
Ambient temperature:
Do shocks or vibrations occur?
Special seals required?
Works Certificate?
Test certificate from authority required?
Special conditions or specifications to be considered?
No
No
No
No
No
minimum normal maximum
Yes
Yes
Yes
Yes
Yes
°F °F °F
against:
type:
type:
which:
(e.g. ISO 10474 3.2 according to EN 10204)
(e.g. ISO 10474 3.1B according to EN 10204)
(e.g. Lloyds; ABS; API; BV; DNV etc.)
(without gearing)
m
Pd
z
b
x
mm
-
in
-
Slewing Ring
mm
-
in
-
Drive pinion
-
in
Number of drive pinions
Centre distance
60
Application Data Sheet - Slewing Rings
1/in 1/in
Fax
Fax
Fax
Fax
4. Load parameters:
Slewing direction:
Peculiarities:
One direction only Alternating directions
Any additional application service factor?
Equipment utilization time in years:
Average operating hours per year:
yrs
hrs
5. Offer data:
Yearly usage:
Required delivery time:
Proposal required by:
Lot size:
Target price:
pieces per year
weeks
date
pieces per delivery lot
price per unit
No Which one:
6. Remarks:
Date: Processed by:
Yes
Axial load
Radial load
Tilting moment
perm gearing circumferential force
max gearing circumferential force
Torque (Slewing Ring)
Duty (% of rotation)
Rotational speed (Slewing Ring)
Rotational speed max (Slewing Ring)
Slewing angle
Slewing time
Interruption time
Angular acceleration
Continuous rotation without interruption
if: Interrupted rotationCycle description
Test load Extreme loadOperating load
Normal Maximum
Fax
Frad
Mk
fz norm
fz max
Md
ED
lbs
lbs
ft-lbs
lbs
%
lbs
ft-lbs
rpm
n max
δS1
αb
tS1
tU1
degrees
s
s
rad/s2
n
rpm
61
Application Data Sheet - Slewing Rings
Fax
Frad
MK
62
Notes
For custom configurations, we alsosupply material certificates. Thesecertificates log the actual values ofmaterial characteristics such astensile strength, apparent yieldingpoint, notched bar impact work,extension and chemical analysis.
Destructive and non-destructive material testsare performed accordingto the latest industryrecognized methods(i.e. ultrasonic testing,developed by theFraunhofer Institute).
Acceptance testing of aRoller Slewing Ring.
The delivery of a Roller Slewing Ringof over 5 m / 16.404 ft in diameter foran overseas crane (seaworthy packing).The wide-load transportation requiredpolice escort.
Qu
ali
ty A
ssu
ran
ceQ
uali
ty A
ssu
ran
ce
IMO Slewing Rings have to meetthe highest quality requirements
because they are often used assafety critical machine components.
Development, design, calculation,manufacturing and sales at our
Headquarters in Germany areperformed strictly according to
DIN EN ISO 9001 certifiedprocedures.
“We want you tobe satisfied”
Qu
ali
ty A
ssu
ran
ceQ
uali
ty A
ssu
ran
ce
500/
B82
39/U
/DV
/US/
Jan
11
www.goimo.comAll contact details of our global partnersare to be found at: www.goimo.com
Plant I, Gremsdorf, Germany
Plant II, Gremsdorf, Germany
Plant III, Summerville, SC, USA
IMO Group of Companies
USAIMO USA Corp.101 Innovation DriveMcQueen ParkSummerville, South Carolina 29483, USATel. +1 843 [email protected]
Environmental TechnologiesMachine- and Plant ManufacturingIMO Anlagenbau GmbH & Co. KGImostrasse 1, 91350 Gremsdorf, GermanyTel. +49 9193 6395-50Fax +49 9193 [email protected]
Slew DrivesIMO Antriebseinheit GmbH & Co. KGGewerbepark 16, 91350 Gremsdorf, GermanyTel. +49 9193 6395-20Fax +49 9193 [email protected]
Slewing Ringsfor Renewable EnergyIMO Energy GmbH & Co. KGImostrasse 1, 91350 Gremsdorf, GermanyTel. +49 9193 6395-30Fax +49 9193 [email protected]
Slewing RingsIMO Momentenlager GmbH & Co. KGImostrasse 1, 91350 Gremsdorf, GermanyTel. +49 9193 6395-40Fax +49 9193 [email protected]
Central ServicesIMO Holding GmbHImostrasse 1, 91350 Gremsdorf, GermanyTel. +49 9193 6395-0Fax +49 9193 [email protected]