SKF single row deep groove ball bearings are manufactured with Normal radial internal clearance as standard. Most of the bearings are also available with C3 radial internal clearance. Some of the bearings can even be supplied with the appreciably greater C4 or the smaller C2 clearances. In addition, deep groove ball bearings are available with reduced or displaced internal clearance ranges. These special clearances may use reduced ranges of standard clearance classes or partitions of adjacent classes (designation suffix CN). SKF bearings with internal clearance not to standard are supplied on request.

The values for radial internal clearance are given in table - Radial internal clearance of deep groove ball bearings . They are in accordance with ISO 5753:1991 and are valid for unmounted bearings under zero measuring load.