OIL SHEAR MOTOR BRAKES - Presmec International

World Class Oil Shear Brake Technology

®

®

OIL SHEAR MOTOR BRAKES

1 *BASED ON JOB-SITE STUDIES AND SATISFIED CUSTOMER REPORTS

Electro Shear ® Oil Shear Motor Brakes

High Performance AC Brake Technology,For Superior Heat Dissipation

The Electro Shear® Oil Shear Motor Brakes areproven and reliable in the toughest industrialapplications. Midwest Brake has been theleader in oil shear brake technology forover 35 years, offering the highestquality, most reliable brakes available inthe market today.

Originally developed for the rigorous stops and startsof automotive transfer lines, Electro Shear® Oil Shearbrakes are designed for excellent heat dissipation,which allows for higher cycle rates without brake fade.

Increased Machine Productivity, Reduced Life Cycle Costs

Oil Shear Brake Technology dramatically increases brakelife through superior heat dissipation. Torque is transferredthrough viscous shearing of oil between multiple frictiondisc surfaces, resulting in very little friction disc wear.

A continuous oil flow lubricates and cools discs allowing theheat build up from engagement to dissipate through thecast aluminum housing.

Electro Shear® brakes last up to 10 times longer* thanstandard dry friction brakes due to the oil shear design andadvanced composite friction material.

Exceptionally Long Life,Eliminate Frequent Repairs

Electro Shear® dramatically increases brake service lifethrough the advanced, totally encapsulated AC coiltechnology and the high performance composite frictionmaterial.

In many cases, the Electro Shear® will outlast andoutperform typical dry friction brakes up to 10 to 1. ElectroShear® brakes keep performing where other brakes fail,reducing the need for frequent, costly repairs. ElectroShear® will eliminate downtime and reduce operating costsyear after year, cycle after cycle.

Constant Tension Winch Applications – External Encoder Mounting

2


Proven In Tough Applications

Electro Shear® is proven andreliable for heavy, industrialequipment in dirty, wetproduction environmentswhere typical dry frictionbrakes fail.

Specially designed for highcyclic applications, ElectroShear® offers the superior heatdissipation and performanceneeded to eliminate machinedowntime.

Industries Served

• Automotive • Mineral Processing

• Aggregates • Mining

• Cement • Oil & Gas

• Coal • Packaging

• Energy • Plastics

• Food Processing • Power

• Forest Products • Rail

• Lumber • Rubber

• Marine • Steel

Electro Shear ® Applications

• Cranes & Hoists • Conveyors

• Winches • Material Handling Equipment

• Constant Tension Winches • Bulk Material Handling

• Rotary Coal Samplers • Machine Tools

• Palletizers • Transfer Equipment

• Jet Ways • Cement Block Equipment

• Electric Motors • Tire Forming Equipment

• Dock & Pier Handling • Barge Haulers• Equipment •

Mineral ProcessingMineral Processing

Conveyor SystemsConveyor Systems

Cranes & HoistsCranes & Hoists

3


Model 8725 – Standard Detroit Hoist** Application

Based on Job Site Studies and Application Case Studies.

Oil Shear Operation

Electro Shear® brakes are spring applied, electricallyreleased, multiple disc “Oil Shear” brakes. The brake discstack is immersed in a bath of oil, totally enclosed againstmoisture and contamination.

Electro Shear® brakes stop the machine load by theshearing of an oil film between alternating which results invirtually No Wear On The Friction Disc Surfaces.

The unit is self contained, totally enclosed and utilizesadvanced composite friction material discs with steelalternating discs.

Superior Heat Dissipation

The Electro Shear® brake has a well designed, castaluminum housing that allows for excellent heat dissipation.A continuous oil flow through the disc stack, cools andlubricates discs allowing the heat build up fromengagement to dissipate through the cast aluminumhousing.

Totally Enclosed System

Midwest Brake® is the only company that offers a totallyencapsulated AC coil design. This design, coupled with thetotally enclosed cast aluminum housing make the brakeimpervious to outside contaminates, dirt, coolant and water.This increases the life of the brake and leads to years ofmaintenance free operation.

Exceptionally Long Disc Stack Life

The inertia of the machine isstopped by the shearing ofan oil film between thealternating paper and steeldiscs. These discs do notcontact until over 90 percentof the inertia is absorbed.

This leads to exceptionallylong disc stack life. Staticand dynamic torque ratiosare nearly the same,resulting in fast, smoothstops.

Torque Ratings

Electro Shear® brakes achievetorque through springpressure and active frictionsurfaces. The torque ratingof each brake model can bevaried to meet specificmachine requirements byrearranging the disc stackand/or substituting heavier/lighter springs. If needed,brakes can easily be modifiedat the factory or in the field.

10

9

8

7

6

5

4

3

2

1

0Dry FrictionDisc Brakes

Electro-ShearBrakes

Brak

e Li

fe

4


A.C. Coil Assembly

Application RatedBrake Disc Stack

Spring Set Actuator

Cast Aluminum Housing

Viton Oil Seals

Blind or ThruHub-Spline and

Keyway Mounting

Fully Retained Hub

Manual Release w/Auto Reset

Ultimate SimplicityFast Response Time

The precision and speed of the 3-phase alternating coilmeans fast response time and the most accuraterepeatability of any machine brake. The Electro Shear® ACcoils are extremely efficient, low inertia and provide thefastest response time, typically 10 milliseconds. Forsuper critical applications improve response time to 1/100of a second.

Precise, Smooth Stopping

Oil Shear technology, inherently, offers smooth, precisestopping power consistently over the life of the brake. Thefriction disc linings do not fade with temperature and sincethe unit is completely sealed, ambient conditions do notaffect torque. Stopping times of 10 – 40 milliseconds canbe achieved, this will vary dependent on applications.

No Adjustment Needed

Electro Shear® brakes are spring set, multiple disc, selfadjusting brakes. The advanced composite friction materialis designed to minimize disc stack surface wear andrequires no adjustment.

Fail Safe Braking

Electro Shear® brakes are set by multiple springs andreleased by either a 230, 415, 460, 575 volt AC coil. Whencurrent is not present, the brake is engaged by the multiplesprings making act as a fail safe brake.

Simple Installation,One Piece Assembly

Electro Shear® brakes are easily installed on the rear C-flange of a NEMA standard motor. They are shipped fromthe factory completely assembled and are installed in one,integral piece – No Loose Pieces, No Assembly Required.

Installation can be performed quickly and easily in amanner of minutes. Simply secure the brake using theMidwest Brake supplied bolts, make the electricalconnections to the AC power source as per the servicemanual, fill with Type F automatic transmission fluid andthe brake is ready for operation.

Electro Shear® is easily fit to accommodate custommounting configurations including gear boxes, metricmotors, double c-face applications, thru shaft applicationsand many others. Please contact your Midwest Brakerepresentative for application assistance.

Operating Principle

Three phase, alternating electric current is applied, theactuator is pulled by the energized electromagnetic coilwhich overcomes the spring pressure. The friction discsare allowed to rotate freely. When the electrical power tothe coil is interrupted, the spring pressure mechanicallyforces the actuator to clamp the disc stack. This developstorque to stop or hold the load.

Step 1 – Remove Old Brake Step 2 – Slide Brake on Motor Shaft

Step 3 – Fill Brake Using Type F Fluid Step 4 – Wire Brake to Motor

Electro Shear ® – 8 Standard Sizes

Electro Shear® Model 8749Max Torque 1750 Lb-ft



5


Electro Shear ® Features

• 8 Standard Sizes - Torque Range Up To 1750 Lb-ft

• Electric A.C. Power – 230 VAC, 460 VAC, 575 VAC

• NEMA Motor Standard Mounting Designs

- 56 C Frame – 449T Frame- T-Frame Motors- U-Frame Motors

• IEC Motors

• Simple & Easy One Piece Installation

• Spring Set, Fail Safe Brake

• Cast Aluminum Housing

• Self Adjusting

• Horizontal or Vertical Mounting

• Manual Release

Mounting Easily Customized

• Optional Custom Bores

- Thru Shaft- Metric Bores- Tapered Shafts- Stepped Shafts- Splined Shafts

• Encoder Mounting – External For Easy Access

• Proximity Switch / Brake Release

• Foot Mounted Designs

• Glass Sight Gauge Optional

Foot Mounted Brakes

Electro Shear® Model 8727 – Foot Mounted Bracket Installations

6







Electro Shear® Brakes Can AccomodateThru Shafts For Encoder Mounting

Electro Shear® Can Be Provided WithIntegral Shaft Extension For Encoder Mounting

Midwest Brake® ProvidesCustom Bracket Designs

Thru Shaft Brakes Encoder Brakes Foot Mounted Brakes

Electro Shear® Model 8725 – 25 Ton Overhead Hoist Installation

Double C Face Brakes Gear Box Mounted Brakes

7


Electro Shear ® Brakes For Constant Tension Winches

Model 8725 – Slide Adjustment Motor Installation

Automotive Body Lift

Electro Shear ® Brakes For:

• Coal & Mining Applications

• Material Handling Equipment

• Conveyors

Slide Adjustment Motor

Model 8729 Installed on an Automotive Body Lift Application

8


Electro Shear ® Brakes Rail Bridge Applications

Use Electro Shear® brakes for RailBridge applications. Brake shownwith foot mounted bracket andproximity switch for brake releasefeedback.

Model 8727 For A Bridge Application

*THE LISTED TRADEMARKS ARE REGISTERED OR UNREGISTERED TRADEMARKS OF THEIR RESPECTIVE OWNERS.ELECTRO SHEAR IS A REGISTERED TRADEMARK OF MIDWEST BRAKE CORPORATION.

Model 8722 – Concrete Block Machine Application

9

Electro Shear ® BrakesFor Overhead Crane &Hoist Applications

Model 8725 Installed on a Low Head* Overhead Crane Application Model 8725 Installed on a Mono Rail Detroit Hoist* Application

*THE LISTED TRADEMARKS ARE REGISTERED OR UNREGISTERED TRADEMARKS OF THEIR RESPECTIVE OWNERS.ELECTRO SHEAR IS A REGISTERED TRADEMARK OF MIDWEST BRAKE CORPORATION.


Installations*

• Detroit Hoist

• Electro Lift

• Whiting Crane

• R & M Crane

• Low Head Hoists

• Kone

• Yale

• Hepburg

• Michigan Crane

• Lesco

• Kranco

• Acco

• Jaso

• Zenar

• American Monorail

• Shepard Niles

• Shaw-Box Cranes

• Street Crane

• Ace World

• P&H Crane

Model 8725 Installed on a Trolley Application Model 8725 Installed on a R&M* Gearbox D-8 Type Application

Model 8727 – R&M* D-11 Installation

10


Electro Shear® Model 8725 & Model 8724 – 25 Ton Overhead Crane Application – Electro Shear® Brakes Installed On Site At Midwest Brake®

Material Handling Applications

Whether it is an overhead hoist or portal crane application,Midwest Brake® has the Oil Shear Brake solution. ElectroShear® easily mounts to gear box applications and hoists,indoor or outdoor. We have installed thousands of brakesin both retrofit and new equipment installations.

• Fast, Simple Installation

• One Piece Assembly

• No Loose Pieces

• Nema, Gear Box and Foot Mount

Electro Shear ® Brakes For Machine Tool Applications

Model 8725 – Buhr* Feed Drive Installation

Model 8765 – Lamb* Mechanical Feed Drive Installations

Model 8766 – Lamb* Mechanical Feed Drive Installation

9800 Series Double “D” Flange Brake I.E.C. Motor on Tap Head Application

11


Model 8766 – Lamb* Slide Installations(Generation One Brakes In Operation Since 1987)

• Lamb

• Thyssen

• Buhr

• LaSalle

• Gehring

• Cross Huller

• Kingsbury

• Ingersoll

• Fellows

• R & B

• Ex-Cell-O

• Greenlee

• Comau

• Gidding & Lewis

• Oloffsson

12


Oil Shear Principle

Electro Shear® brakes transmit torque through the shearingof oil molecules between alternating paper friction discsand steel wear discs. The viscous shearing of the oil(automatic transmission fluid) dissipates the heatgenerated from the operation of the Electro Shear® and iscarried away by the continuous circulation of the oil.

The oil shear principle is the primary reason oil shearbrakes offer extremely long service life and superiorreliability.

Operation of the Electro Shear® brakebegins with an oil film which is made up ofmultiple oil molecules. Molecules of oil areattracted to one another, giving oil definedviscosity.

The Electro Shear® brakes contains astack of alternating discs. The ElectroShear® utilizes advanced compositesintered bronze friction discs and steeldisc wear plates.

The Electro Shear® brake maintains a filmof oil between the friction surfaces,through which torque is transferred.

As the friction discs begin to rotate, theopposing drive cuts across the film of oilmolecules.

Oil molecules ride on and between thefriction discs and act like small hydrodynamic bearings.

The kinetic energy (heat) generatedduring operation of the Electro Shear®

brake is carried away by the continuouscirculation of the oil molecules.

Electro Shear® brakes incorporate a true oil shear into thedesign where the friction discs are continuously floodedwith oil to continually lubricate and cool friction discsurfaces. A true oil shear actually cuts across the film of oilmolecules that is maintained between the alternating discsurfaces.

The oil itself acts as efficient power transmission medium,which relieves the mechanical friction surfaces of much ofthe work. The oil effectively absorbs and dissipates heat

13


POSITION NUMBER 1, 2, 3, 4

87228724872587278728872987398749

POSITION NUMBER 6 & 7

04 = 4.50 Pilot08 = 8.50 Pilot10 = 10.50 Pilot12 = 12.50 Pilot16 = 16.00 Pilot

POSITION NUMBER8

T = ThruO = No Thru

POSITION NUMBER 11,11, 12, 13

063=5/8 Bore075=3/4 Bore138=1-3/8 Boreetc.

POSITIONNUMBER14,14, 15, 16, 17

Torques

POSITION NUMBER9

1 = 460V AC (60Hz)2 = 230V AC (60Hz)4 = 415V AC (50Hz)5 = 575V AC (60Hz)

POSITION NUMBER10

1 = Nipple2 = 6ft. Cord3 = 8ft .Cord4 = 10ft .Cord5 = 12ft. Cord

POSITION NUMBER5

H = HorizontalT = Vertical

TopB = Vertical

Bottom

• OPTIONS INCLUDE: ENCODER BRAKE MOUNTINGPROXIMITY SWITCHTHRU SHAFTFOOT MOUNTDOUBLE C FACE

**SPECIAL UNIT – CONSULT FACTORY

MODEL MODEL MODEL MODEL MODEL MODEL MODEL MODEL8722 8724 8725 8727 8728 8729 8739 8749

003.1 007.0 019.0 063.0 146.0 120.0 181.0 350.0006.0 013.0 024.0 076.0 183.0 150.0 226.0 437.0009.1 020.0 036.0 088.0 220.0 168.0 272.0 525.0012.7 028.0 048.0 101.0 257.0 180.0 317.0 612.0018.0 035.0 060.0 113.0 293.0 210.0 362.0 700.0

025.0** 041.0 073.0 127.0 330.0 240.0 408.0 788.0049.0 085.0 135.0 367.0 252.0 453.0 875.0059.0 101.0 152.0 385.0 270.0 507.0 978.0068.0 119.0 168.0 427.0 294.0 570.0 1101.0

189.0 486.0 301.0 633.0 1223.0203.0 336.0 721.0 1392.0211.0 358.0 811.0 1566.0228.0 378.0 901.0 1740.0253.0 420.0

478.0537.0597.0

NOTE: TO INSURE PROPER APPLICATION, PLEASE CONTACT MIDWEST BRAKEFOR FINAL APPROVAL OF MODEL NUMBER AND TORQUE REQUIREMENTS.

Available Torques (Lb-ft)

•

MODELNUMBER MOUNTING

POSITIONHOUSINGPILOT

THRU/NO THRU(SHAFT) VOLTAGE

TORQUE

HUBBORE

CONNECTORCORD

1 2 3 4 5 6 7 8 9 10 11 12 1613 14 15 17

To Select Electro-Shear ® Brakes Use the Following Table

14


Electro Shear ® Technical Specifications

Electro Shear ® Motor Frame Chart

Model 56 143 145 182 213 215 254 256 284 286 324 326 364 365 405 445 449

8722 x x x

8724 x x x

8725 x x x x

8727 x x x x x x

8278 x x x x x x x x

8729 x x x x x

8739 x x x

8749 x x x

Model Min Bore Max Bore AllowableShaft Length

Min TorqueLb-ft

Max TorqueLb-ft

WeightLbs

8722 0.625 1.375 2.500 3.1 25 15

8724 0.875 1.875 2.75* 7 68 38

8725 1.125 1.875 3.75 19 119 60

8727 1.125 1.875 4.630 63 253 92

8278 1.375 2.625 6.000 146 486 120

8729 1.625 2.625 6.250 120 597 120

8739 1.625 3.625 6.875 181 901 175

8749 1.625 4.250 8.688 350 1740 200

Torque Lb-ft = Motor HP x 5250 x 1.5RPM

Service Factor = 1.5

15

Non-Standard Motor Mounting Dimensions

“C’FACE” DIA.

STEP - YES OR NO(3 PLACE DIM.)

(3 PLACE DIM.)

KEYWAYKeyway

(3 Place Dim.)

“C Face” Dia.

Step – Yes or No (3 Place Dim.)

THREADAND

DEPTH

XOXo

Thread and Depth

FRAME FU Fa FAH FAK FAJ FBF & DP

56(SEE NOTE)

143T145T

182T184T

213T215T

254T256T

284T286T

324T326T

364T365T

404T405T

182U184U

213U215U

254U256U

284U286U

324U326U

364U365U

404U405U

.6250

.6245

.8750

.8745

.6250

.6245

.8750

.8745

1.12501.1245

1.37501.3745

1.6251.624

1.8751.874

1.8751.874

2.1252.124

.8750

.8745

.8750

.8745

1.12501.1245

1.37501.3745

1.6251.624

1.8751.874

2.1252.124

3/16

3/16

3/16

1/4

5/16

3/8

1/2

1/2

1/2

3/16

3/16

1/4

5/16

3/8

1/2

1/2

1.500TO

2.063

1.500

2.125

2.500

3.125

3.750

4.375

4.375

5.000

2.125

2.000

2.750

3.500

4.625

5.375

6.125

4.500

4.500

8.500

8.500

8.500

10.500

12.500

12.500

12.500

4.500

8.500

8.500

10.500

12.500

12.500

12.500

5.875

5.875

7.250

7.250

7.250

9.000

11.000

11.000

11.000

5.875

7.250

7.250

9.000

11.000

11.000

11.000

3/8-16.56 DP.

3/8-16.56 DP.

1/2-13.75 DP.

1/2-13.75 DP.

1/2-13.75 DP

1/2-13.75 DP

5/8-11.94 DP.

5/8-11.94 DP

5/8-11.94 DP

3/8-16.81 DP.

1/2-13.75 DP.

1/2-13.75 DP.

1/2-13.75 DP.

5/8-11.94 DP.

5/8-11.94 DP.

5/8-11.94 DP.

FBF&

DP

FA

45O

FAKMOUNTING

FACE

FAH

Fa

FU

45o

FAJ

FAK

FAH

FU

Fa

MountingFace

FBF & DP(4 Holes)

56 Frame Note: Variation of FU and FAH dimensions are dependent onmotor horsepower and R.P. M.


Standard Motor Mounting Dimensions

16

Definitions of Mounting Positions

Horizontal Mount

Vertical Top Mount Vertical Bottom Mount

Motor

Drive End

Motor Motor

Drive End

Drive End

Envelope Dimensions

B

Mot

or

A

C

D

B

Mot

or

A

C

D

8729

14.38

8.25

8.19

10.12

8739

17.25

8.625

9.625

11.625

8749

20.00

10.375

11.00

13.00

8728

14.38

5.50

8.25

10.12

8727

14.38

6.06

7.88

8.08

MODEL

8724

9.31

5.00

4.75

7.00

A

B

C

D

DIMENSIONMODEL

8722

7.00

5.03

4.73

5.88

A

B

C

D

DIMENSION


Certified Drawings Available on Request.

8725

11.88

6.13

6.19

6.96

17

Company

Address

City State Zip

Contact Title

Phone Fax

Crane Manufacturer*

Brake Location* What is the Voltage of the Crane? Does the Crane have a Load Brake?

■■ Hoist ■■ Bridge ■■ Trolley ■■ 200V ■■ 230V ■■ 460V ■■ 575V ■■ Yes ■■ No

Brake Manufacturer Brake Model Number

Brake Serial Number Brake Mounting Position

Brake Mounting Position

■■ Horizontal ■■ Vertical

Is Brake Mounted on Motor?

■■ Yes ■■ No

Motor Manufacture Motor Frame (Include Letters)

Motor Horsepower Motor R.P.M.

Motor Model Number

Does Motor Face Have C-Face on Opposite to the Drive End?


Is Brake Mounted on a Gear Box?


Gearbox Manufacturer Gearbox Model Number

Other Mounting Information:

What is the Mounting Bolt Circle? (See Fig. 3) What is the Bolt Size? (See Fig. 3)

What is the Shaft Diameter? (See Fig. 2) Does the Shaft have Steps on it? (See Fig. 2)

Does the Shaft Extend Thru the Brake? What is the Keyway Size? (See Fig. 2)

If Brake is Mounted to Spline Shaft What is the Number of Teeth? (Sample Hub or Shaft Required for Measurement)

What is the Length of the Shaft Extension for the Mounting Surface? (See Fig 2)

Will Any Part of the Application Limit or Interfere with an Electro Shear® Application?

Electro Shear ® Application Data Sheet Information Needed For Quotation

* Required Information


18

Electro Shear ® Mounting Dimensions

FAKMOUNTING

FACE

FAH

Fa

FU

“C’FACE” DIA.

STEP - YES OR NO(3 PLACE DIM.)

(3 PLACE DIM.)

KEYWAY

A

B

THREADAND

DEPTH

XO

D

GEAR BOX

MOTOR

C

E

Xo

Thread and Depth

Keyway

3 Place Dim.)

“C Face” Dia.

Step - Yes or No(3 Place Dim.)

FAK

FAH

FU

Fa

Mounting Face

Motor

Gearbox

E

C

A

B

D

Figure 1

Figure 3 Figure 4

Figure 5

Note: When ordering gearboxstyle Electro Shear ® please notethe number of teeth.

Figure 2

Customer Notes and Comments:


BULLETIN NO. ESB-001 ©COPYRIGHT 2007 - MIDWEST BRAKE

®

26255 Groesbeck Hwy.Warren, MI 48089 U.S.A.

586.775.3000 • 586.775.3040 (Fax)800.525.4503 (Toll Free)www.midwestbrake.com

[email protected] (E-mail)

Documents

OIL SHEAR MOTOR BRAKES - Presmec International