Four Point Contact B. FAG QJ210 -MPA

The FAG QJ210-MPA four-point bearing, measuring 50 × 90 × 20 mm, accommodates high axial forces in both directions whilst taking up minimal space.

The FAG QJ210-MPA four-point bearing is a specialised radial rolling bearing designed to accommodate axial forces acting in both directions whilst requiring minimal installation space. Due to the special raceway geometry, the rolling elements contact the rings at two points during operation under axial load, similar to angular contact ball bearings. With a bore of 50 mm, an outside diameter of 90 mm and a width of 20 mm, this design offers a compact alternative to double-row bearings. Designers use this variant primarily where tight axial clearances are required.

For which loads is the QJ210-MPA four-point bearing suitable?

This four-point bearing is primarily suitable for designs subject to predominant or alternating axial forces. The model is often combined with a separate radial bearing, with the outer ring fitted with radial clearance to absorb purely axial loads. As this is an open design without a seal, you should incorporate the bearing into the machine’s lubrication circuit. The permissible temperature range is from –30 to +150 degrees Celsius.

What are the advantages of the split inner ring and the brass cage?

The two-piece inner ring allows for a higher number of rolling elements and significantly simplifies assembly. As the bearing is not self-retaining, the inner ring halves and the outer ring, together with the ball and cage assembly, can be fitted separately. The suffix MPA denotes a brass cage that offers high mechanical strength. In combination with the standard radial bearing clearance and tolerance class P0 or ABEC 1, the component is suitable for industrial applications requiring standardised manufacturing precision.