NewBee Machinery is a professional machinery parts manufacturer providing high quality precision bearings, high-quality non-standard transmission components, and intelligent CNC equipment and more.
NewBee Machinery is a professional machinery parts manufacturer providing high quality precision bearings, high-quality non-standard transmission components, and intelligent CNC equipment and more.
The RB-type crossed roller bearing (RB cross roller bearing) is a heavy-duty precision bearing featuring double rows of rollers orthogonally arranged at 90°. Its innovative split outer ring and solid inner ring structure enables combined load capacity for axial, radial, and overturning moments, making it a core component in high-precision rotating mechanisms for heavy equipment. NewBee Transmission’s RB series, with its reinforced raceway design and extreme size range (inner diameter: 80–2000 mm), is the preferred solution for engineering machinery, tunnel boring machines (TBMs).
Double-row orthogonal roller layout increases load distribution area by 40% compared to RA-type bearings, with max axial load capacity up to 9,800 kN and overturning moment resistance improved by 60%.
Raceways undergo deep carburizing and quenching (HRC 60–64), enhancing core toughness and increasing resistance to plastic deformation by 50%. Ideal for high-vibration applications like TBM cutterhead drives.
Preloaded split outer ring ensures P4-grade rotation accuracy (radial runout ≤0.003 mm), meeting directional requirements for large radar bases.
Made of vacuum-degassed bearing steel (ISO 683-17) with multi-lip seals, delivering a design life of 80,000 hours under heavy-duty conditions.
Split outer ring supports on-site assembly, resolving transport challenges for oversized bearings (>Ø1,500 mm) and reducing installation costs.
Industry Equipment Examples Key Function
Engineering Machinery TBM Main Drive Unit Withstands cutterhead torque and rock impact
Energy Equipment Large Wind Turbine Yaw Systems Resists extreme wind-induced overturning moments
Heavy Machine Tools 5-Axis Gantry Machining Center Turntables Ensures positioning accuracy during heavy cutting
Port Machinery Container Crane Slewing Mechanisms Balances eccentric loads from hoisting
Special Vehicles All-Terrain Rescue Vehicle Hydraulic Platforms Adapts to torsion demands on rough terrain
Bearings with inner diameter >1,000 mm incur 25–35% higher price due to complex heat treatment.
Nitrided steel (42CrMo4V) bases cost 15–20% more than standard steel but extend lifespan by 30%.
P4-grade RB bearings are 10–15% pricier than P5-grade (higher precision grinding costs).
Salt-spray-resistant coating (C5M standard) or -50°C low-temperature grease increases price by 8–12%.
Key Considerations When Purchasing RB Bearings
Provide axial force, radial force, and overturning moment parameters (NewBee offers free technical validation).
Split outer rings require bolt preload force uniformity ≤5% (installation manuals provided).
NewBee Transmission: Premier RB Bearing Supplier
NewBee Transmission’s RB series covers full inner diameter range (80–2000 mm) with core advantages:
Manufacturing Capability: Uses CNC induction hardening lines (raceway hardness uniformity ≤HRC 2).
Quality Assurance: 100% laser profilometer scanning (accuracy: 0.001 mm), compliant with ISO 12128-1.
Custom Solutions: Supports integrated gears (module 8–20) and embedded sensors (temperature/vibration monitoring).
RB Bearing Usage Guidelines
Tighten split outer ring bolts in diagonal sequence (refer to torque values in technical manual).
Initial filling: EP2 extreme-pressure lithium grease (50% internal space); replenish 10% every 2,000 operating hours.
Temperature alarm threshold: 90°C; shutdown required if vibration velocity RMS >4.5 mm/s.
Request RB Bearing Technical Parameters & Pricing
NewBee Transmission offers 24-hour selection support:
📧 Email: Tom@newbeetrans.com
🌐 Website: www.newbeetrans.com
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