RB Ultra thin bearings
Brand: PRS
Category: Bearing
Seal: Double-sided seal
Size: Inner diameter 20mm-1250mm, Outer diameter 36mm-1500mm
- Product Description
RB Ultra Thin Bearings - Precision Engineering for Space-Critical Applications
When your application demands maximum performance in minimal space, RB Ultra thin bearings deliver the precision and reliability you need. These specialized crossed roller orientation highlight an fundamentally internal ring and part external ring arrangement, making them perfect for applications requiring uncommon internal ring rotational exactness. With internal breadths extending from 20mm to 1250mm, items give engineers with flexible arrangements for requesting mechanical applications where space limitations cannot compromise performance.
Technical Design and Structure
The RB arrangement speaks to a principal approach to crossed roller bearing plan. The necessarily internal ring development guarantees predominant rotational exactness, whereas the part external ring plan encourages simple establishment and upkeep. This arrangement dispenses with the complexity of distinct inward ring congregations whereas keeping up the tall stack capacity characteristic of crossed roller bearings.
The bearing structure comprises of round and hollow rollers organized at 90-degree points to each other. This opposite course of action empowers the bearing to handle combined outspread, hub, and minute loads at the same time. The rollers are isolated by spacer retainers that avoid
Working Principle and Load Distribution
The items work on the crossed roller guideline, where rotating rollers are situated opposite to each other inside the raceway. This course of action makes numerous contact focuses that convey loads over both spiral and hub headings simultaneously.
The necessarily inward ring turns as a single unit, guaranteeing steady geometry and minimizing runout. The part external ring plan permits for exact preload alteration amid establishment, optimizing bearing clearance for particular application necessities. This controlled preload dispenses with inside clearance and improves rotational accuracy.

Performance Advantages
The crossed roller configuration provides several distinct advantages over conventional ball bearings. Higher load ratings result from the linear contact between rollers and raceways, distributing forces over larger surface areas. This design characteristic enables products to handle heavier loads while maintaining compact cross-sectional dimensions.
Rotational accuracy reaches precision grades up to P4/P2, meeting stringent requirements for high-precision applications. The integral inner ring construction eliminates potential assembly variations that could affect concentricity and runout measurements.
Moment load capacity represents another significant advantage. The wide bearing span created by the perpendicular roller arrangement provides exceptional resistance to tilting moments, making these bearings suitable for applications with overhung loads or cantilever configurations.
Technical Specifications
| Parameter | Specification |
|---|---|
| Bearing Type | RB Series Crossed Roller |
| Inner Ring | Integral construction |
| Outer Ring | Split design |
| Inner Diameter Range | 20mm - 1250mm |
| Outer Diameter Range | 36mm - 1500mm |
| Seal Configuration | Double-sided seal |
| Precision Grades | P4 / P2 available |
| Load Types | Radial, axial, moment loads |
| Material | High-grade bearing steel |
Applications and Industry Use
These bearings excel in applications where space limitations demand compact solutions without performance compromise. Robotic joints benefit from the high moment capacity and rotational precision, enabling accurate positioning and smooth operation. Machine tool spindles utilize the rigid support characteristics for improved cutting accuracy and surface finish quality.
Turntable applications leverage the moment load capacity for supporting heavy workpieces while maintaining precise angular positioning. The split outer ring design simplifies installation in confined spaces where bearing mounting access is limited.
Medical equipment applications require the combination of smooth operation and compact design. RB Ultra thin bearings provide the reliability necessary for critical positioning systems and diagnostic equipment where consistent performance directly impacts patient care quality.
Manufacturing and Quality Assurance
Luoyang Precision Bearing Co., Ltd. produces RB bearings using advanced manufacturing processes within our 15,000 m² production facility. Our 200+ precision manufacturing machines ensure consistent quality across all bearing components, from initial material processing through final assembly.
Quality control measures include comprehensive dimensional inspection, surface finish verification, and functional testing. Each bearing undergoes rigorous testing to verify load capacity, rotational torque, and precision grade compliance. Our factory pass rate exceeds 99.9%, reflecting our commitment to delivering reliable products.
Our technical team of 35 engineers provides application support throughout the bearing selection and implementation process. This expertise ensures optimal bearing configuration for your specific requirements, maximizing equipment performance and service life.
Packaging & shipping
Your goods are unique, and their journey should be flawless. Therefore, we offer professional and customized packaging services. Our experienced team will evaluate your goods' characteristics, transportation route, and environmental requirements to recommend the most secure solution.

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Installation and Maintenance Considerations
The split outer ring design facilitates installation in applications where shaft access is limited. Proper mounting procedures require careful attention to outer ring preload adjustment to achieve specified bearing clearance. Installation tooling should distribute mounting forces evenly to prevent race distortion.
Regular maintenance involves monitoring rotational torque and temperature during operation. Sealed bearings require minimal maintenance beyond periodic inspection for contamination or wear indicators. Replacement intervals depend on operating conditions, load factors, and application duty cycles.
For technical consultation regarding RB Ultra thin bearings selection or application-specific requirements, contact our engineering team at ljh@lyprs.com. Our experienced engineers provide comprehensive support to ensure optimal bearing performance in your application.
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