The guide bushings are made of high-grade bearing bronze. The guide borehole is turned in precision to ISO tolerance H6, the outside diameter to ISO tolerance h5. As the guide borehole is machined while the guide bushing is in a prestressed condition, control measurement of the guide bushing is not possible in its delivered, non-stressed state.

The clamping screws integrated in the FSK - FSL series bushings are cheese-head screws to ISO4762 (DIN912) which are actuated using a ISO2936 (DIN911) screwdriver. The radial borehole for mounting the parallel pins is configured to ISO tolerance H7.

The transport of lubricant to the various chambers is permitted In the FSK - FSL series, through the space between the clamping screws and the through holes. The lubricant used is predominantly mineral oil, whose viscosity is adjusted to the respective operating conditions.

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