Four Point Contact B. FAG QJ307 -TVP

The QJ307-TVP four-point bearing from FAG Wälzlager accommodates high axial forces in both directions whilst maintaining compact dimensions of 64.802 x 80 x 21 mm.

The QJ307-TVP four-point bearing belongs to the group of radial angular contact ball bearings and is characterised by its special raceway geometry. Owing to its contact angle, this rolling bearing transmits considerable axial forces in both directions, yet requires hardly any more axial installation space than a single-row deep-groove ball bearing. Designed as an open bearing, it can be flexibly integrated into existing lubrication systems. It is manufactured to the standard tolerance class P0/PN (corresponding to ABEC 1) with standard radial clearance.

In which bearing arrangements is the QJ307-TVP four-point bearing used?

Design engineers primarily choose this design for applications where predominantly axial loads occur and axial installation space is limited. The bearing often functions as a pure axial bearing in combination with a separate radial bearing. In industrial applications, it is used to guide the shaft axially in both directions. When used purely as an axial bearing, the outer ring is given radial clearance within the housing to ensure that no unwanted radial forces act on the rows of balls.

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

The split inner ring design allows for separate assembly: the outer ring with ball race and the two inner ring halves can be fitted onto the shaft and housing independently of one another. The dimensionally stable polyamide cage (suffix TVP) guides the balls quietly and reduces the bearing weight. The component is designed for a temperature range of -20 to +120 degrees. As the outer ring has no groove, it is secured in the housing via flat abutment shoulders.