China OEM RA Series Crossed Roller Bearings with Good quality

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 2 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.

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

RA Series Cross Roller Bearing Applications

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 equipment, measuring instruments, and IC manufacturing machines.

How to install RA series crossed roller bearing?

1. Thoroughly clean the bearing seat and other parts, and make sure there are no burrs;

2. Because it is a thin section bearing, it is prone to tilt when inserted. In order to prevent this phenomenon, please keep the level while tapping evenly with the plastic, and insert the bearing into the bearing seat or the shaft little by little until the sound confirms that it is entirely close to the reference surface;

3. Put the fixed flange into the crossed roller bearing, and shake the fixed flange to match the position of the bolt hole;

4. Insert the fixing bolt into the hole, and when turning the bolt by hand, confirm that the bolt is not challenging to screw in due to the deviation of the bolt hole;

5. The fixed locking is divided into 3~4 stages from incomplete locking to complete locking, and tightened repeatedly in the diagonal order. When tightening the divided inner ring or outer ring, slightly rotating the integrated ring or inner ring can correct the deviation of the inner ring or the outer ring from the main body.

Company Information

We are a professional bearing exporter in China, producing many different types and sizes of bearings. We can provide you with excellent service in a wide range of bearings with world-class quality, such as deep groove ball bearings, spherical roller bearings, self-aligning ball bearings, cylindrical roller bearings, tapered roller bearings, angular contact ball bearings, needle roller bearings, crossed roller bearings, pillow block bearing, slewing bearings, spherical plain bearings, etc. Bearings can also provide OEM services according to customer requirements. Our bearings products are widely used in various applications, such as port, ship, vehicle, mining, engineering, lifting, environmental protection, oil, chemicals, light industry, metallurgical machinery, the military, etc. Products are exported to the United States, Germany, Japan, Spain, Canada, Italy, France, Finland, South Korea, India, Singapore, Brazil, Australia, and other countries. If you need crossed roller bearings, please get in touch with us.


Q. Are you a trading company or a manufacturer?

A: We are a manufacturer.

Q: How long is your crossed roller bearings delivery time?

A: Generally, it is 3-5 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, according to quantity.

Q: Do you provide samples for crossed roller bearings? Is it free or extra?

A: Yes, we could offer the sample for free but do not pay the freight cost.

Q: Could you accept OEM and customize crossed roller bearings?

A: We can customize it for you according to the sample or drawing.

Q: What are your terms of payment?

A: Payment<=1000USD, 100% in advance.Payment>=1000USD, 30% T/T in advance ,pay the balance before shippment.

Q: Will you check these products before shipment?

A: Our factory QC Process System will strictly inspect products before shipment. We have a professional QC team.

Q: What will we do if you are unsatisfied with the product?

A: If you have any abnormalities, please get in touch with us for the first time, and we will immediately process them.

If you need crossed roller bearings or any models of bearings, please contact me!