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RBC Bearings
Spherical Plain Bearings

Spherical Plain Bearings

Product catalog summary

Introduction
RBC Bearings Incorporated, founded in 1919, is a prominent manufacturer of both standard and custom-engineered bearings. The company emphasizes innovation, quality, and product development for specific applications across industries such as aerospace, construction, and mining.

Product Offerings
RBC Bearings provides a diverse range of high-quality bearings, including:

Heavy Duty Needle Roller Bearings: Known for longevity with features like Pitchlign® and TandemRoller®.
Spherical Plain Bearings: Available in various designs with options like DuraLube™ and QuadLube® for maintenance-free performance.
Cam Followers and Yoke Rollers: Includes RBC Roller® and HexLube® for extended life.
Rod Ends: Offered in commercial and aerospace grades, with self-lubricating options.
Self-Lubricating Bearings: Suitable for high temperature and load applications, branded as Fiberglide®.
Thin Section Ball Bearings: Available in various materials and sizes up to 40 inches.
Airframe Control Bearings: Includes ball bearing and needle roller types.
Custom Designed Bearings: Tailored solutions for specific applications.

Spherical Plain Bearings
RBC has pioneered spherical plain bearing technology, offering products that handle high loads and misalignment, used in hydraulic cylinders, vehicle suspensions, and heavy equipment. Key trademarks include DuraLube™, QuadLube®, and ImpactTuff®.

Quality and Distribution
RBC employs a total quality control system and just-in-time manufacturing, with a vast distribution network of over 1,600 distributors and sales engineers worldwide.

Warranty and Disclaimer
RBC products are warranted for material and workmanship for 90 days from shipment. The catalog is provided "as-is" for informational purposes, with no implied warranties.

Technical Specifications
The document includes detailed specifications for various series of spherical plain bearings, highlighting their capabilities in handling radial and thrust loads, misalignment, and operating temperatures. The selection guide provides insights into the suitability of different bearing types for specific applications.

Specifications
The document lists dimensions for spherical plain bearings, including inside diameter, outside diameter, inner and outer ring widths, and sphere diameter. It specifies tolerances for these dimensions and provides information on the unmounted diametral clearance.

Load Limits
Recommended load limits for static radial, static thrust, and dynamic radial loads are outlined, emphasizing that ultimate static and impact loads should not exceed 150% of the catalog ratings.

Fitting Recommendations
Fitting recommendations for ISO R7 (Press Fit) and ISO f6 (Slip Fit) for both shaft and housing bore dimensions are provided, along with recommendations for shaft and housing fillet maximums.

Series Information
The document covers different series of bearings, including Series B--L and Series MB--, with specific part numbers and additional notes on coatings and fracture for larger sizes.

Key Data from Tables
Tables provide detailed measurements for each bearing size, including weight, tilt angle, and specific load capacities. They also indicate the recommended housing bore and shaft diameter for each bearing size.

Additional Notes
The document advises consulting the technical section for alternate housing diameter recommendations and provides conversion factors for weight from kilograms to pounds.

Key Features of RBC QuadLube® Bearings
The RBC QuadLube® bearings are designed to address common failure modes in spherical plain bearings, such as unidirectional loads, heavy loads, and neglected lubrication intervals. The innovative design includes circular lube channels and a circumferential groove to enhance lubrication distribution and retention, reducing maintenance and downtime.

Applications
These bearings are suitable for use in construction equipment, mining machinery, lift trucks, material handling equipment, log skidders, off-highway vehicles, and satellite dishes. The design allows for direct replacement of conventional bearings without modifications to housings or shafts.

Recommendations
The document recommends regular lubrication and adherence to specified load limits to maximize bearing life. It also suggests consulting the technical section for alternate housing diameter recommendations if needed.

Advanced Seal Technology
The document highlights the SpreadLock® Seal technology, which features double positive contacting lips to enhance sealing efficiency by keeping contaminants out and lubricant in. The design aims to maximize protection against contaminants while maintaining proper bearing operation.

Self-Lubricating Bearings
DuraLube™ self-lubricating spherical plain bearings are introduced, offering grease-free operation with a PTFE liner system. These bearings are suitable for demanding applications and are dimensionally interchangeable with standard steel-on-steel bearings.

Guidelines for Use
The document provides guidelines for using DuraLube™ bearings, emphasizing that they should not receive additional lubrication to prevent dirt entrapment. It also notes that these bearings use the same housing and shaft fits as standard bearings.

Featured Products
The ImpactTuff® bearing is highlighted for its advanced shock load protection, improving resistance to shock loads by 300%. The CrossLube® bearing is noted for its improved lubrication distribution, particularly effective in contaminated environments.

Conclusion
This document serves as a comprehensive guide for selecting and installing spherical plain bearings, with detailed specifications and recommendations to ensure optimal performance and longevity.

Catalog excerpts

QuadLube , SpreadLock Seal, ImpactTuff , DuraLube ® ® ® TM Spherical Plain Bearings Innovative product features that provide unique performance advantages. High load capacity, re-lubrication options, and patented designs. ISO 9001:2000 www.rbcbearings.com 800.390.3300

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RBC Bearings Incorporated has had a long tradition of innovation. commitment, and quality since the company was founded in 1919. Today, RBC Bearings has grown into a world-class manufacturer of standard and custom-engineered bearings and related products, with a product focus on research, testing, and development of the best product RBC Bearings, with facilities throughout North America and Europe, provides bearings and precision products for applications in the con- struction, mining, material handling, transportation and off-highway equipment, robotics and automation, farming, machine tool,...

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Table of Contents Page No. Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Radial Spherical Plain Bearings Series B--L, B--LSS, Inch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9 Series MB--, MB--SS, Metric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13 QuadLube® Long Life Spherical Plain Bearings FEATURED PRODUCT FEATURED PRODUCT Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-15 Series B--LSSQ, Inch . . . . . . . . . . . . . ....

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j^^BC originated the precision ground single fracture spherical plain bearing and continues to be the leader in design and innovation. Listed below are the basic types of spherical plain bearings that RBC makes with pertinent selection criteria. RADIAL TYPE SPHERICAL PLAIN BEARINGS STANDARD SERIES Designed to support heavy radial loads under misalignment. These bearings also possess moderate thrust loading capability. They are non-separable with a single fractured outer ring, and are available in open or sealed de- signs and inch or metric sizes. With an extended inner ring, the need for additional...

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RADIAL TYPE SPHERICAL PLAIN BEARINGS EXTENDED LIFE SERIES B-LSSQ and MB-SSQ SERIES B-LNMSS and MB-NMSS SERIES Up to 300% improved service life provided by innovative lubrica- tion system. The patented system distributes lubrication to the load zone even when no load reversal exists and allows re- lubrication without removing the load. These bearings provide an increased life to many problem applications. Available in inch or metric sizes. RBC's DuraLube™ self-lubricating spherical plain bearings pro- vide long life in demanding applications. Grease-free operation is accomplished through the use...

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Spherical Plain Bearings Radial - Inch Outer rings of bearings size 72 and above are double fractured (suffix-9L). Bore dimensions apply after MoS2 coating. All other dimensions are before coating.

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Spherical Plain Bearings Radial - Inch O Ultimate static and impact loads should not exceed 150% of catalog ratings. @ See technical section for alternate housing diameter recommendations.

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Spherical Plain Bearings Radial - Inch Series B-LSS Outer rings of bearings size 72 and above are double fractured (suffix-9L). Bore dimensions apply after MoS2 coating. All other dimensions are before coating.

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Spherical Plain Bearings Radial - Inch Series B-LSS O Ultimate static and impact loads should not exceed 150% of catalog ratings. @ See technical section for alternate housing diameter recommendations.

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Spherical Plain Bearings Radial - Metric Outer rings of bearings size 160 and above are double fractured (suffix-9L). All dimensions apply before MoS2 coating and Fracture.

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Spherical Plain Bearings Radial - Metric O To obtain weight in pounds, multiply by 2.20462 (lb/kg). © See technical section for alternate housing diameter recommendations.

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Spherical Plain Bearings Radial - Metric Series MB-SS Outer rings of bearings size 160 and above are double fractured (suffix-9L). All dimensions apply before MoS2 coating and Fracture.

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Spherical Plain Bearings Radial - Metric Series MB-SS O To obtain weight in pounds, multiply by 2.20462 (lb/kg). © See technical section for alternate housing diameter recommendations.

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FEATURED PRODUCT Long Life Spherical Plain Bearing Inner Ring Circumferential Groove Circular Lube Channels Outer Ring Tough applications in construction and material handling requires a spherical plain bearing with longer life, less maintenance and less downtime than standard spherical plain bearings. A bearing with total interchangeability to standard designs is preferred. RBC engineering developed the QuadLube® spherical plain bearing after observing the three predominant factors which contribute to the failure of spherical plain bearings: 3) Neglected lubrication intervals Each factor contributes...

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FEATURED PRODUCT Long Life Spherical Plain Bearing Lubrication Flow Spherical Plain Bearing Spherical Plain Bearing The innovative design of the RBC QuadLube® interconnecting lubricating groove system ensures a more efficient distribution of the lubricant by providing channels that transport the grease throughout the entire bearing, including into the contact area of the bearing under load. In cases of unidirectional load or when lubrication intervals are missed, the groove system retains extra lubricant where it is needed for added margin of performance. In the dirtiest of environments the grooves...

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Long Life Spherical Plain Bearings - Inch Series B-LSSQ Outer rings of bearings size 72 and above are double fractured (suffix-9L). Bore dimensions apply after MoS2 coating. All other dimensions are before coating.

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Long Life Spherical Plain Bearings - Inch Series B-LSSQ O Ultimate static and impact loads should not exceed 150% of catalog ratings. © See technical section for alternate housing diameter recommendations.

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Long Life Spherical Plain Bearings - Metric Series MB-SSQ Outer rings of bearings size 160 and above are double fractured (suffix-9L). All dimensions apply before MoS2 coating and Fracture.

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Spherical Plain Bearings

Spherical Plain Bearings

Catalog excerpts

All RBC Bearings catalogs and technical brochures

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