Fit system for drawn cup roller clutches

The main dimensions of drawn cup roller clutches are closely tolerated. In order to achieve a good bearing seat while at the same time being easy to assemble, the outside diameter of the shafts or the inside diameter of the bores are tolerated according to the fit system. The recommended shaft and bore fits are given below.

Recommended fit for the shaft

Series Spring material Shaft tolerance
for high loads		 Shaft tolerance
for low loads
(Md perm < 50%)
HF, HFL steel h5 h6
HF..-KF, HFL..-KF plastic h8 —
HF..-R, HFL..-R steel h5 h6
HF..-KFR, HFL..-KRF plastic h8 —
HFL0606-KFR, HFL0806-KFR plastic h9 —
Md perm = permissible torque
Dimensional tolerance limits

Recommended fit for the bore

Series Spring material Tolerance for Steel, cast iron
high load / low load (Md perm < 50%) 		bore tolerance
for light metal
high load / low load (Md perm < 50%) 		max. Ø in plastic
HF, HFL steel N6 / (N7) R6 / (R7) —
HF..-KF, HFL..-KF plastic N7 R7 —
HF..-R, HFL..-R steel — — D-0,05 mm
HF..-KFR, HFL..-KRF plastic — — D-0,05 mm
HFL0606-KFR, HFL0806-KFR plastic — — D-0,05 mm
Md perm = permissible torque
Dimensional tolerance limits

This information is to be seen as a recommendation. The data has been carefully compiled from various sources, but no guarantee is given for any information.