The above is for reference only, and the actual parameters are subject to material.
Crossed roller bearing
Product Display / Details
Model Number
SRA5008
Inner Diameter
50mm
Outer Diameter
66mm
Width
8mm
Basic Rated Loading C
5.1kN
Basic Rated Loading C0
7.19kN
Weight
0.08kg
Equivalent
THK / RA5008
IKO / CRBS508
Quality standard
ISO9001:2000 ; ISO9001:2008
Brand Name
TBB or OEM (as per customer's need)
Structure and Characteristics
With the cross-roller ring and compact structure, cylindrical rollers are arranged crosswise, with each roller perpendicular to the adjacent roller
in a 90°V groove, are separated from each other by spacer or cage. This design allows just one bearing to hold loads from all directions
including radial, axial and moment loads.
Cross roller bearings can be manufactured in various structures with spacer, cage or full complement. The cross roller bearings with spacer or
cage are suitable for high speed and low friction applications while full complement cross roller bearings for low speed and heavy load.
Since the cross roller bearings achieve high rigidity despite the minimum possible dimensions of the inner and outer rings, it is optimal for
applications, such as joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators,
precision rotary tables, medical equipments, measuring instruments and IC manufacturing machines.
• High Rotation Accuracy
• Easy Handling
• Skewing Prevention
• Significant Increased Rigidity
Types and Features
SRA Thin type (Separable outer ring for inner ring rotation)
SRA series are small, light and compact bearings with the thinnest possible inner and outer rings. It is the best choice for locations where space saving, weight reduction and downsizes are required, such as hands of robots and manipulators or other swiveling units. The outer ring of SRA is separable and fixed by special rivets after installation.
SRB/SRBC/SRBH Standard Type (Separable outer ring for rotation inner ring)
SRB/SRBC/SRBH series are standard types with outer and inner rings as small as possible. it's outer ring is separable while the inner ring is designed to be integrated with the main body. This type is very suitable for the locations where high rotation accuracy of inner ring is required,such as index table swiveling unit of machine tool.
SRE Standard Type (Rotation outer ring)
Based on and improved form SRB,model SRE has the same major dimensions as model SRB and is widely used in the locations where the rotation accuracy of the outer ring is required.
SRC Standard Type (Separable outer ring for rotation inner ring)
SRC series are similar to SRB series. The two separable outer rings are connected by cirlips.
SRT Standard Type
SRT series are similar to SRB and SRE in structure and design. SRT tapered cross roller bearing,with tapered roller cross-arranged and spaced by retainer in V groove, has two separable outer ring or inner ring. Compared with cylindrical cross roller bearing, this design allows on bearing to uphold heavier load. The features of this type are high rotation accuracy, high speed and excellent stability.
TBB Bearing Provision is a professional bearing import and export company with over 10 years of experience in this field.
Our brand is TBB which stands for To Be the Best. It is and will always be our company philosophy, whether regarding bearing quality, on time delivery, or sales supporting service; we will always try every effort to be the best among your bearing suppliers.
TBB Target
To provide customer satisfactory product and service,
To provide TBB Bearing to worldwide OEM market and aftermarket.
Constantly optimizing TBB customer service system.
TBB Supplier Management
Based on our rich experience in Chinese bearing, we established TBB supplier management system, and have around 3000 bearing manufacturers data; among which over 60 manufacturers we have cooperated for a long time; our professional engineer team will audit every cooperated supplier in the very start and also evaluate yearly.
TBB Customer Service
TBB’s cooperated more than 5 years’ customers reached 80%.
TBB provide various kinds of bearings, with a size range from 3mm to 4000mm.
TBB complaint rate remains less than 2%, which will always be handled within 7 days.
TBB value the accuracy of delivery time, with a rate of 98%.
Since 2009 year, we have built up long term cooperation with professional authoritative bearing test centers working with the advanced inspection facilities and scientific guidance, to ensure every customer receive well performance goods.
TBB Reinvestment, we use 10% yearly profit as TBB reinvestment
We set up multiple sales platforms to assure stable and long term development.
We set up advanced management system to assure stable product chain, and keep competition advantage.
Our warehouse is located in Shanghai, and is operated under a complete logistic system, which ensures our reliable and efficient product delivery.
Company culture
We pay attention to every partner, about their growth and development;
We pay attention to every staff, about their growth and development.
TBB Product Ranges
Standard Bearings including
Deep groove ball bearings
Tapered roller bearings
Cylindrical roller bearings
Spherical roller bearings
Spherical plain bearings
Pillow blocks
Adapter sleeves
Special field bearings including
EMQ bearings
Slewing bearings
Railway bearings
Machine Tool Spindle Bearings
Wind power bearings
TBB Case Study
Product: Big size Tapered roller bearing
Application: Bonfiglioli Wind Turbines Gearbox
Customer Background: Original bearing supplier was America Timken, standard design with special raw material produced by Timken
TBB Material solution: Raw material supplier--XINGCHENG STEEL, top bearing steel manufacturer in China Raw material is produced by XINGCHENG STEEL based on TBB request, with strict control of Ti, H, O elements.
TBB Design: (1) Bearing rings and rollers are with convexity design, have control of convexity value. Greatly increase bearing life.
(2) Use Romax Designer, simulate actual application conditions, calculate bearing life and load capacity, improve product performance.
Sample Test: 18 months,2 times samples submition,2 times bench test, test is finished after certain time, TBB samples were in good condition, samples are homologated.
Final Result: From January 2016 TBB started bearing supply to Bonfiglioli, yearly order amount about USD 1,200,000
Hope we will have the opportunity to be on your service!
