High axial and shock loads occur in one direction but no radial loads are present
The load carrying capacity of the corresponding axial deep groove ball bearings is no longer adequate (in this case, bearings of series 811 and 812 are especially suitable)
The bearing arrangement must have very high axial rigidity
The axial space available is very small
The bearing arrangement can be configured, where the axial space is very small, as a direct bearing arrangement
The bearing parts can or must be mounted separately
The bearing arrangement is not configured in itself but, for cost reasons, ready-to-fit standard bearings are to be used