Four Point Contact B. SKF QJ210 MA

The SKF QJ210 MA four-point bearing accommodates high axial loads in both directions whilst maintaining compact dimensions of 50 × 90 × 20 mm.

The QJ210 MA four-point bearing is a single-row rolling bearing in the SKF Explorer performance class, specifically designed for combined loads with a predominantly axial component. Thanks to its specific raceway cross-section, the bearing transmits axial forces in both directions whilst requiring minimal axial installation space. Designed as an open version without seals, the bearing can be integrated into existing lubrication circuits. The enhanced dimensional accuracy to tolerance class P6 and running accuracy to P5 ensure smooth, low-vibration operation.

In which applications is the QJ210 MA four-point bearing used?

Design engineers primarily use the QJ210 MA four-point bearing where axial guidance is required in confined spaces. Typical applications include bearing arrangements subject to alternating axial loads. This design is often fitted as a pure axial bearing with radial housing clearance and combined with a separate radial bearing. As this model is designed without retaining grooves in the outer ring, it is secured in the housing via flat abutment shoulders.

What is the function of the split inner ring and the brass cage?

The two-piece inner ring allows for the accommodation of a large number of rolling elements and simplifies assembly. The outer ring, together with the ball and cage, can be slid on separately from the inner ring halves. The solid brass cage (MA) is characterised by high strength and guides the balls along the outer ring. Together with the standard radial bearing clearance, the design covers a permissible operating temperature range of -30 to +150 degrees Celsius.