SPIETH-designed guide bushings are round linear guiding elements for all fields of precise mechanical engineering.

These guide bushings are ideal for applications making use of the benefits of the slideway, such as damping properties, but require minimal guide play. For those advantages these guide bushings are successfully applied in guide frames, cylindrical carriage guides, on tailstock sleeves, press rams etc.

In addition to their linear movement, simultaneous rotary movements are possible. For reasons of lubrication technology, however, pure rotation as for sliding bearings is not allowed. High acceleration values are possible, as long as an adequate supply of lubrication is ensured.

Following practical examples will give an overview of different applications:
 

Fig. 1: Column guide: Guide play adjustment using threaded ring. A locating fit at the threaded ring ensures the necessary rectangularity of face contact at the guide bushing. The required feed path can be prescribed when the flange cover has not yet been tightened by turning the threaded ring. The guide bushing is then preloaded by tightening the screws at the clamping cover.

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Fig. 2: Working slide with circular guidance. The required degree of guide play is set here by changing the height of the shim ring (see Application, Assembly series FDK - FDL). Due to existing overdefinition, the actual position for the guide bars cannot be finally determined until guide play adjustment is complete.

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Fig. 3: Particularly in large-scale machines with their high operating loads, it is advantageous if the design can be configured to ensure an optimum guidance basis at every position of the sleeve.

This is achieved using the arrangement illustrated here. The external guide bushing shown at the top of the illustration can be offered on request as a special version.

The two most frequently applied methods of adjusting the guide play are illustrated here. The upper one with a threaded ring and the lower one with shim ring. For a more detailed description, see assembly examples Column guide and Working slide with circular guidance (Fig. 1 and Fig. 2).

All variants of these guide bushings can be supplied in a special version up to a maximum diameter of 430 mm.

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