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#DWwebinar
Finally! An Alternative to Slewing Ring Bearings
with Heavy Duty Rings and Vee Guide Wheels
#DWwebinar
q This webinar will be available afterwards at www.designworldonline.com & email
q Q&A at the end of the presentation q Hashtag for this webinar: #DWwebinar
Before We Start
#DWwebinar
Miles Budimir Design World
Moderator
Brian Burke Product Manager
Bishop-Wisecarver Group
Finally! An Alternative to Slewing Ring Bearings with Heavy Duty Rings and Vee Guide Wheels
#DWwebinar
Overview Agenda Bishop-‐‑Wisecarver Group
Introduction Range of products
An Alternative to Slewing Ring Bearings Key features and design concepts of vee rings Heavy capacity vee guide wheels and rings meet design criteria for slewing bearing applications How vee technology can meet your bearing life expectations
• Minimize installation time & extend service maintenance intervals
#DWwebinar
Bishop-Wisecarver Group
BWG is a woman-‐‑owned family of WBENC certified companies who works with manufacturers to engineer, manufacture, and build linear and rotary motion solutions, custom complex assemblies, and optimal embedded intelligence systems. Through the integration of mechanical, electrical, software, control and systems design engineering expertise, 60+ years of experience and 20,000+ unique clients, we continue to provide a single point of service that results in custom designs, increased efficiencies, and accelerated time to market.
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Product Lines DualVee Motion Technology®
Guide wheels, linear track and components
LoPro® – linear actuators & sub-‐‑assemblies Un-‐‑driven, Belt, Chain, Lead-‐‑screw, Ball-‐‑screw
UtiliTrak® – linear guides MinVee® – miniature linear guides QuickTrak® – modular t-‐‑slot based linear guides MadeWell® – low complexity linear guides
Radial wheels & crown rollers ALR – aluminum rings
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Components to Complete Systems
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DualVee Motion Technology®
Guide wheel based linear guides for Smooth action with very low “stiction” stick-‐‑slip Excellent for long lengths and harsh environments High accuracy and repeatability Speeds to 5.5 m/s, acceleration to 5 g’s Corrosion resistant versions available
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Markets & Applications Served Aerospace Automatic Storage and Retrieval Systems Automation Equipment Automotive Bakery Machinery Camera Scanning Conveyor Systems Manufacturing Door and Gate Systems – Heavy Duty Electronic Assembly Food Processing and Scanning Foundry and Sheet Metal Handling Mach. Glass Cucing and Handling Inspection and Test Systems Industrial Washing Systems Laser Marking and Welding Machinery
Tobacco Machinery Textile and Industrial Sewing Equipment Tire Manufacturing Equipment Woodworking X-‐‑Ray Machinery XY Gantry Systems
Material Handling, Palletizing Medical Nuclear Equipment or Handling Paper Converting, Tissues, Films Packaging and Filling Machinery Paint Spraying Systems Paper and Wood Pharmaceutical Equipment Plaster Board Machinery Plastics Postal Automation Press Feed Equipment Production Machinery Printing and Labeling Machinery Security Cameras Semiconductor
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Slewing Bearing Applications
Heavy loads and large diameters Earthmoving equipment
• Excavators, etc.
Energy & Power Generation • Windmills, Turbines, etc.
Medical Equipment • Radiation Treatment Machines
Vehicles and Automotive • Tank & Gun Turrets • Defense
Industrial Equipment • Material Handling & Positioning • Automated Machinery
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Slewing Bearing Characteristics
Positive Characteristics Extreme loads Slow to medium rotational speed Large to extremely large diameters
• 500mm to 5m
Various construction types & features • Ball, roller, crossed-‐‑roller, etc. • Flanged • Gear tooth profiles
Internal or external
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Slewing Bearing Characteristics
Negative Characteristics Long lead-‐‑times
• 4 to 6 months • Made-‐‑to-‐‑order
High procurement cost Installation Time/Effort
• Mating surface preparation • Mounting procedure
Maintenance • Lubrication • Seal replacement
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Slewing Bearing Characteristics
Negative Characteristics Long lead-‐‑times
• 4 to 6 months • Made-‐‑to-‐‑order
High procurement cost Installation Time/Effort
• Mating surface preparation • Mounting procedure
Maintenance • Lubrication • Seal replacement
Vee Rings 4 to 6
WEEKS
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Vee Guide Wheel Bearings and Rings
Ideal for automation & machinery Completely different concept
Solid steel Vee guide rings • Internal, external, dual
Support bearings • Sealed ball bearings or
tapered roller bearings • Internally lubricated for life
Lubricator housings Drive tooth profiles
• Gear Tooth: Internal, External • Belt Tooth: External
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Vee Guide Wheel Bearings
Provide load capacity & guidance
Double Row Bearings Debris tolerant Higher load capacity
Twin Bearings Tolerant of slight misalignment Lower load capacity
Both versions up to 54mm outside diameter in PRT2 product line
Dynamic Load Capacity Size 54 Radial: 13595 N (3056 lb-‐‑F) Axial: 2320 N (521 lb-‐‑F)
Dynamic Load Capacity Size 54 Radial: 21373 N (4804 lb-‐‑F) Axial: 4601 N (1034 lb-‐‑F)
Note: Dynamic Load Capacity is for comparison purposes only. Please use Working Load Capacity to calculate load/life.
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Heavy Duty Vee Guide Wheel Bearings
Larger wheel bearings are available HDRT line has 64 mm, 95 mm and 120 mm outside diameter
• Double row ball design • Sealed and internally lubricated for life
Compatible with rings of 25 mm thickness
Dynamic Load Capacity Size 120 Radial: 63,830 N (14,349 lb-‐‑F)
Note: Dynamic Load Capacity is for comparison purposes only. Please use Working Load Capacity to calculate load/life.
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Heavy Duty Vee Guide Wheel Bearings
Largest wheel bearing HDRT 150 mm outside diameter
• Double row tapered roller bearing design • Sealed and internally lubricated for life • Compatible with rings of 33 mm thickness
Dynamic Load Capacity Size 150 Radial: 150,018 N (33,725 lb-‐‑F)
50kN Working Load
Note: Dynamic Load Capacity is for comparison purposes only. Please use Working Load Capacity to calculate load/life.
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Heavy Duty Vee Guide Wheel Bearings
Hardened and precision ground running surfaces
Smooth low friction motion
Proven Vee wiping action for harsh environments
Ejects debris
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Guide Wheel Mounting Options
Mounting styles for wheel bearings Blind hole fixing Through hole fixing
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Heavy Duty Vee Guide Ring Designs
Rings made from a single piece 7 Standard ring diameters: 512, 640, 768, 896, 1280, 1456, 1656 mm Custom diameters up to 1800 mm maximum
Multiple designs Vees on internal, external or opposing surfaces
Gear tooth profile on internal or external surfaces Belt tooth profile on external surface Solid ring plate without center hole
HDRE Series: External Vee
HDR Series: Internal Vee
Ring plate is a custom
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Heavy Duty Vee Guide Ring Features
Rings made from high quality steel Hardened and precision finished for durable and smooth running surfaces
High carbon steel or stainless steel Precision grades
P2: Ground on vee face and internal register P1: Ground on vee face, internal register, mounting face SS: Ground on all surfaces
Double Vee Rings
Single Vee Rings
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Heavy Duty Vee Guide Ring Mounting
Mounting ring spacers Standard with counterbored through holes for M10 bolts Option for M14x2 thread tapped holes
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Heavy Duty Vee Guide Ring Mounting
Spacers provide clearance to wheel bearings Steel or stainless steel Matched to wheel bearing/ring combinations
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Vee Guide Ring Mounting
Mount unsupported Precision onely needed where wheel bearings mount, and where ring acaches
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Gear Teeth and Pinions
Gear tooth profile is MOD4 with 20 pressure angle Made to ISO 1328 grade 10 Nitride hardened
Pinions to match ring gear tooth profile Supplied with keyless locking bushing for h8 tolerance shaft Carbon or stainless steel versions
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Heavy Duty Vee Guide Rings
Large Diameter Rings Made from multiple segments
• Theoretically unlimited diameter/radius
Rings over 3m ship disassembled
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Heavy Duty Vee Guide Rings
Examples
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Heavy Duty Vee Guide Rings
Examples
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Load Capacity vs Slewing Bearings
Based upon size HDRT rings have less load capacity than slewing bearings Alternative choice for many applications
HDRT Vee rings provide Excellent usable life Limited maintenance and long maintenance intervals
• Lubricate Vee surface, grease gear teeth Simple bearing replacement procedure
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Load Capacity
Dependent upon the wheel bearings Number of wheels Capacity of each wheel
Maximum number of wheels Not recommended to exceed 8
• Difficult to ensure they all share the load Can add wheels where loads are higher
Typical designs
Guide wheels evenly spaced 3 each or 4 each
Maximum number of wheels
System Loading: Radial, Axial, Moment
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Load Capacity
Typical 3 and 4 wheel capacities Note: Stainless steel systems are 25% lower capacity
*Øc is the ring contact diameter in meters.
Rotary turn-‐‑table on linear stage
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Sizing Method for Vee Systems
Step 1: Determine the resultant Axial Load (LA) and Radial Load (LR). Step 2: Calculate the Load Factor (LF) using the equation below
Note: LA(Max) is from the provided chart
Step 3: Calculate the system life in distance Note: Basic Life (BL) is from the provided chart
Step 4 (Optional): Calculate system life in time Use cycle time and cycle distance
=
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Sample Life Calculations
Application: Automation Turn-‐‑Table Direct axial load of 500kg (1102lb) 4 bearings, equally spaced External vee ring design
• HDRE 1280 with 1280mm OD.
Rotary turn-‐‑table design concept
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Sample Life Calculations - Distance
HDRE1280 with 4x THJR120 bearings ($$$$) 63,540 km or 15,961,876 rev.
HDRE1280 with 6x THJR95 bearings ($$$)
54,744 km or 13,730,624 rev.
HDRE1280 with 4x THJR95 bearings ($$)
25,000 km or 6,273,378 rev.
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Sample Life Calculations - Time
Duty Cycle: Automation Turn-‐‑Table Index and stop for assembly operations
• Operate for 16 hours/day ~ 2,000 full revolutions Cycle time about 30 seconds
Example 1: 4x THJR120 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years
#DWwebinar
Sample Life Calculations - Time
Duty Cycle: Automation Turn-‐‑Table Index and stop for assembly operations
• Operate for 16 hours/day ~ 2,000 full revolutions Cycle time about 30 seconds
Example 1: 4x THJR120 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years
Example 2: 6x THJR95 13,730,624 rev. ÷ 2,000 rev. = 6,865 days ÷ 365 days/year = 18.8 years
#DWwebinar
Sample Life Calculations - Time
Duty Cycle: Automation Turn-‐‑Table Index and stop for assembly operations
• Operate for 16 hours/day ~ 2,000 full revolutions Cycle time about 30 seconds
Example 1: 4x THJR120 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years
Example 2: 6x THJR95 13,730,624 rev. ÷ 2,000 rev. = 6,865 days ÷ 365 days/year = 18.8 years
Example 3: 4x THJR95 6,273,378 rev. ÷ 2,000 rev. = 3,136 days ÷ 365 days/year = 8.6 years
#DWwebinar
Sample Life Calculations - Time
Duty Cycle: Automation Turn-‐‑Table Index and stop for assembly operations
• Operate for 16 hours/day ~ 2,000 full revolutions Cycle time about 30 seconds
Example 1: 4x THJR120 ($$$$) 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years
Example 2: 6x THJR95 ($$$) 13,730,624 rev. ÷ 2,000 rev. = 6,865 days ÷ 365 days/year = 18.8 years
Example 3: 4x THJR95 ($$) 6,273,378 rev. ÷ 2,000 rev. = 3,136 days ÷ 365 days/year = 8.6 years
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End of Life
What happens when life estimate is reached? Replace the guide wheel bearings
• Single bolt to remove/replace
Ring can typically last 2x the wheel bearing life • Example with 8 years bearing life = 16 years ring life!
Lubricate and clean vee surfaces to ensure life
Bearing replacement
Lubricator housings
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Lubrication and Maintenance Intervals
Lubricate vee surfaces with light oil Relubricate at intervals to prevent running dry • Rarely less than 3 months • Can be as long as 9 months • Can be automatic with a central lubrication system
Clean debris Wiping felts move debris
Slewing bearings (typical) Continuous operation 40 hours / week
• Inspect & relubricate every 6 weeks
Lubricator housings
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Summary Bishop-‐‑Wisecarver Group
Introduction Range of products
An Alternative to Slewing Ring Bearings Key features and design concepts of vee rings Heavy capacity vee guide wheels and rings meet design criteria for slewing bearing applications How vee technology can meet your bearing life expectations
• Minimize installation time & extend service maintenance intervals
#DWwebinar
Whitepaper
Download the whitepaper www2.bwc.com/Slewing-‐‑Bearing-‐‑Alternatives
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Engineering Assistance One-‐‑on-‐‑one assistance from experience engineers
Ariel OrielApplications Engineer
Ben DomingoApplications Engineer
Dan FletcherApplications Engineer
Justin SchubertApplications Engineer
Toll Free: 1 (888) 580-‐‑8272
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Heavy Duty Vee Guide Rings
Heavy Duty Ring and Track – HDRT Product Line Timing belt tooth profile on external surface
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Miles Budimir Senior Editor Design World mbudimir@wtwhmedia.com
Finally! An Alternative to Slewing Ring Bearings with Heavy Duty Rings and Vee Guide Wheels
Brian Burke Product Manager Bishop-Wisecarver Group Bburke@bwc.com
Questions?
@DW_Motion
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Thank You q This webinar will be available at
designworldonline.com & email
q Tweet with hashtag #DWwebinar
q Connect with Design World
q Discuss this on EngineeringExchange.com
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