Design of bearing arrangements
Proper adjustmentSingle row angular contact ball bearings must either be used with a second bearing (fig. 1) or in sets (fig. 2). The bearings must be adjusted against each other until the requisite clearance or preload is obtained (→ Bearing preload).
When universally matchable bearings are mounted immediately adjacent to each other, there is no need for adjustment (→ Bearings for universal matching). The requisite clearance or preload is obtained by choosing bearings from an appropriate clearance or preload class and by applying suitable fits for the bearings on the shaft and in the housing.
The performance and operational reliability of single bearings depend on proper adjustment while universally matchable bearings depend on the correct selection of clearance or preload. If there is too much clearance in the bearing arrangement during operation, the load carrying capacity of the bearings is not fully utilized. Excessive preload produces more friction and higher operating temperatures, leading to a reduction in bearing service life.