| | The length of the guide bushing is reduced during the clamping process by a few tenths of a mm (depending on the size of the guide bushing, the clamping force and the actual dimensions of the connecting parts). In the process, it drags the part to be clamped in the clamping direction. If the guide bushings are arranged in pairs (e.g. Fig. 1) with opposit clamping direction, in theory this thrust effect is counteracted. However, due to minimal geometrical differences and imprecise coefficients of friction, even in this case a residual thrust in the range of hundredths of a mm can occur in an undetermined direction. However, as it is caused as a result of the actually existing circumstances, this phenomenon is reproducible.
Guide bushings series FAK can be supplied as a special version on request in a non-standard low-thrust version; However in this version the retention force only reaches 0.5 times that of the table value. |
