Plastic 4-Point Contact Ball Bearings

thin race bearings

KMS offers the unique "XR" series bearing style with 4-point contact deep ball groove geometry. This ball groove design enables the bearing to handle simultaneous radial, axial and moment loading while maintaining stiffness. As a bonus they also have minimal radial and axial play. The "XR" groove design will not lock up in the presence of off center loads. The load and speed calculations are for reference only.

The “XR” KMS Plastic Ball Bearing features Celcon® Acetal (POM) for races and ball retainer, and is fitted with 316 stainless balls. When Acetal plastic is not the right fit we have additional standard materials, Kynar® and PEEK, which offer additional benefits. For a list of alternative materials that are available see Semi-Custom Bearings.

KMS recommends testing in actual conditions expected in the applications. The information presented here is believed to be accurate at time of publication but is subject to change without notice.

These are made to order and minimum quantities may apply.

View as Grid List

21 Items

per page
Set Descending Direction
Part # ID OD Width
XR3-6

3/16

1/2

0.156

Details
XR3A-6

3/16

5/8

0.196

Details
XR4-6

1/4

5/8

0.196

Details
XR4A-6

1/4

3/4

0.218

Details
XR4AW-6

1/4

3/4

0.281

Details
XR6-6

3/8

7/8

0.218

Details
XR6A-6

3/8

7/8

0.281

Details
XR8A-3/8B-6

3/8

1 1/8

0.375

Details
XR10B-3/8B-6

3/8

1 3/8

0.4375

Details
XR8-1/2B-6

1/2

1 1/8

0.25

Details
XR8A-1/2B-6

1/2

1 1/8

0.375

Details
XR10B-1/2B-6

1/2

1 3/8

0.4375

Details
XR8-5/8B-6

5/8

1 1/8

0.25

Details
XR10A-5/8B-6

5/8

1 3/8

0.375

Details
XR10B-5/8B-6

5/8

1 3/8

0.4375

Details
XR12-5/16W-6

3/4

1 5/8

0.3125

Details
XR12-7/16W-6

3/4

1 5/8

0.4375

Details
XR16-1B-6

1

2

0.5

Details
XR18-6

1 1/8

2 1/8

0.5

Details
XR16-1-1/4B-6

1 1/4

2

0.5

Details
XR20-6

1 1/4

2 1/4

0.5

Details
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21 Items

per page
Set Descending Direction

Plastic Vs Steel

Lightweight: Plastic is five times lighter than steel, thereby reducing the weight and energy to move them.


Read all the benefits of Plastic vs Steel Bearings