Finally! An Alternative to Slewing Ring Bearings with Heavy Duty Rings and Vee Guide Wheels
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When heavy loads need to be automated or supported by large capacity bearings there are few options for selecting standard products. Slewing ring bearings are often selected for heavy load applications and can be supplied in large diameters. However, the use of slewing bearings should be carefully scrutinized due to their high cost, long lead-times, difficult installation procedures, and frequent service maintenance. Heavy duty rings with vee guide wheels are a viable alternative to slewing bearings because in many cases they can meet the load capacity and life expectations in heavy load applications. Just like slewing rings, heavy duty vee rings can be rack and pinion driven on the inner or outer diameters and feature significant load capacities. However, additional features of vee guide technology provide improvements beyond the limitations of slewing bearings.
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Finally! An Alternative to Slewing Ring Bearings with Heavy Duty Rings and Vee Guide Wheels
- 1. #DWwebinar Finally! An Alternative to Slewing Ring Bearings with Heavy Duty Rings and Vee Guide Wheels
- 2. #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
- 3. #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
- 4. #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
- 5. #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.
- 6. #DWwebinar 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
- 7. #DWwebinar Components to Complete Systems
- 8. #DWwebinar 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
- 9. #DWwebinar 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
- 10. #DWwebinar 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
- 11. #DWwebinar 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
- 12. #DWwebinar 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
- 13. #DWwebinar 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
- 14. #DWwebinar 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
- 15. #DWwebinar 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.
- 16. #DWwebinar 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.
- 17. #DWwebinar 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.
- 18. #DWwebinar 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
- 19. #DWwebinar Guide Wheel Mounting Options Mounting styles for wheel bearings Blind hole fixing Through hole fixing
- 20. #DWwebinar 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
- 21. #DWwebinar 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
- 22. #DWwebinar Heavy Duty Vee Guide Ring Mounting Mounting ring spacers Standard with counterbored through holes for M10 bolts Option for M14x2 thread tapped holes
- 23. #DWwebinar Heavy Duty Vee Guide Ring Mounting Spacers provide clearance to wheel bearings Steel or stainless steel Matched to wheel bearing/ring combinations
- 24. #DWwebinar Vee Guide Ring Mounting Mount unsupported Precision onely needed where wheel bearings mount, and where ring acaches
- 25. #DWwebinar 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
- 26. #DWwebinar Heavy Duty Vee Guide Rings Large Diameter Rings Made from multiple segments • Theoretically unlimited diameter/radius Rings over 3m ship disassembled
- 27. #DWwebinar Heavy Duty Vee Guide Rings Examples
- 28. #DWwebinar Heavy Duty Vee Guide Rings Examples
- 29. #DWwebinar 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
- 30. #DWwebinar 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
- 31. #DWwebinar 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
- 32. #DWwebinar 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 =
- 33. #DWwebinar 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
- 34. #DWwebinar 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 ($$) 25,000 km or 6,273,378 rev.
- 35. #DWwebinar Sample Life Calculations - Time Duty Cycle: Automation Turn-‐‑Table Index and stop for assembly operations • Operate for 16 hours/day ~ 2,000 full revolutions Cycle time about 30 seconds Example 1: 4x THJR120 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years
- 36. #DWwebinar Sample Life Calculations - Time Duty Cycle: Automation Turn-‐‑Table Index and stop for assembly operations • Operate for 16 hours/day ~ 2,000 full revolutions Cycle time about 30 seconds Example 1: 4x THJR120 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years Example 2: 6x THJR95 13,730,624 rev. ÷ 2,000 rev. = 6,865 days ÷ 365 days/year = 18.8 years
- 37. #DWwebinar Sample Life Calculations - Time Duty Cycle: Automation Turn-‐‑Table Index and stop for assembly operations • Operate for 16 hours/day ~ 2,000 full revolutions Cycle time about 30 seconds Example 1: 4x THJR120 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years Example 2: 6x THJR95 13,730,624 rev. ÷ 2,000 rev. = 6,865 days ÷ 365 days/year = 18.8 years Example 3: 4x THJR95 6,273,378 rev. ÷ 2,000 rev. = 3,136 days ÷ 365 days/year = 8.6 years
- 38. #DWwebinar Sample Life Calculations - Time Duty Cycle: Automation Turn-‐‑Table Index and stop for assembly operations • Operate for 16 hours/day ~ 2,000 full revolutions Cycle time about 30 seconds Example 1: 4x THJR120 ($$$$) 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years Example 2: 6x THJR95 ($$$) 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
- 39. #DWwebinar 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
- 40. #DWwebinar 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
- 41. #DWwebinar 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
- 43. #DWwebinar Engineering Assistance One-‐‑on-‐‑one assistance from experience engineers Ariel Oriel Applications Engineer Ben Domingo Applications Engineer Dan Fletcher Applications Engineer Justin Schubert Applications Engineer Toll Free: 1 (888) 580-‐‑8272
- 44. #DWwebinar Heavy Duty Vee Guide Rings Heavy Duty Ring and Track – HDRT Product Line Timing belt tooth profile on external surface
- 45. #DWwebinar 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
- 46. #DWwebinar 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