RA Series Crossed Roller Bearings
RA series cross cylindrical roller bearing is a compact form that reduces the thickness of the inner and outer rings of the RB series to the limit. The crossed roller bearing is suitable for parts that require a small load and compact design, such as the rotating parts of robots and manipulators. There are two types of RA series cross cylindrical roller bearings: RA (open type) and RA-UU (double end face seal) type.
RA Series Crossed Roller Bearings
RA series cross cylindrical roller bearing is a compact form that reduces the thickness of the inner and outer rings of theRB seriesto the limit. The crossed roller bearing is suitable for parts that require a small load and compact design, such as the rotating parts of robots and manipulators. There are two RA series cross cylindrical roller bearings types: RA (open class) and RA-UU (double end face seal) type.
Product Features:
(1) High Precision Grade: P5, P4, P2.
(2) Small Size: conserving space better than RB series crossed roller bearings.
(3) Carry high load: can withstand heavy loads.
(4) High Rigidity: with preload.
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Technical data
| Designation | Main dimensions | Roller pitch circle diameter | Chamfer | Shoulder height | Basic load rating (radial) | Mass | ||||
| inner ring | outer ring | width B /B1 | ||||||||
| d(mm) | D(mm) | (mm) | DP (mm) | r(min) | ds | Dh | C(kN) | C0(kN) | kg | |
| RA5008 | 50 | 66 | 8 | 57 | 0.5 | 53.5 | 60.5 | 5.1 | 7.19 | 0.08 |
| RA6008 | 60 | 76 | 8 | 67 | 0.5 | 63.5 | 70.5 | 5.68 | 8.68 | 0.09 |
| RA7008 | 70 | 86 | 8 | 77 | 0.5 | 73.5 | 80.5 | 5.98 | 9.8 | 0.1 |
| RA8008 | 80 | 96 | 8 | 87 | 0.5 | 83.5 | 90.5 | 6.37 | 11.3 | 0.11 |
| RA9008 | 90 | 106 | 8 | 97 | 0.5 | 93.5 | 100.5 | 6.76 | 12.4 | 0.12 |
| RA10008 | 100 | 116 | 8 | 107 | 0.5 | 103.5 | 110.5 | 7.15 | 13.9 | 0.14 |
| RA11008 | 110 | 126 | 8 | 117 | 0.5 | 113.5 | 120.5 | 7.45 | 15 | 0.15 |
| RA12008 | 120 | 136 | 8 | 127 | 0.5 | 123.5 | 130.5 | 7.84 | 16.5 | 0.17 |
| RA13008 | 130 | 146 | 8 | 137 | 0.5 | 133.5 | 140.5 | 7.94 | 17.6 | 0.18 |
| RA14008 | 140 | 156 | 8 | 147 | 0.5 | 143.5 | 150.5 | 8.33 | 19.1 | 0.19 |
| RA15008 | 150 | 166 | 8 | 157 | 0.5 | 153.5 | 160.5 | 8.82 | 20.6 | 0.2 |
| RA16013 | 160 | 186 | 13 | 172 | 0.5 | 165 | 179 | 23.3 | 44.9 | 0.59 |
| RA17013 | 170 | 196 | 13 | 182 | 0.8 | 175 | 189 | 23.5 | 46.5 | 0.64 |
| RA18013 | 180 | 206 | 13 | 192 | 0.8 | 185 | 199 | 24.5 | 49.8 | 0.68 |
| RA19013 | 190 | 216 | 13 | 202 | 0.8 | 195 | 209 | 24.9 | 51.5 | 0.69 |
| RA20013 | 200 | 226 | 13 | 212 | 0.8 | 205 | 219 | 25.8 | 54.7 | 0.71 |
Product Quick Detail:
- Standard and non-standard available
- With high quality and competitive price
- Prompt delivery
- Packing as per customer’s demand.
We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.
Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port














