With the exception of the sliding surface, GLYCODUR® materials can be machined by all conventional methods. The exposed steel surfaces resulting from machining should be protected against corrosion.
Bushings GLYCODUR® F and GLYCODUR® A
If narrower bushings are required for certain applications, they can be obtained simply by turning or parting off a standard bushing; lubrication holes may also be added later by drilling. In any case, burrs protruding into the sliding surface after machining must be carefully removed.
GLYCODUR® F and GLYCODUR® A bushings are supplied ready for installation. Any subsequent machining of the bore, i.e. the sliding surface, should only be undertaken in exceptional cases, as this will reduce the service life of the bushings.
In these cases the bore of GLYCODUR® F bushings can be calibrated by using a mandrel (). When installing a GLYCODUR® F bushing with an exterior diameter D in a steel housing with the exterior diameter DG, the adjacent diagram will show the approximate values for the required dK of the calibration mandrel (= d + ∆dK). This diagram shows the required oversize ∆dK of the calibration mandrel as a function of the desired expansion ∆d of the bushing bore for various nominal diameters d of the bushing bore; it is valid for the ratio DG /D = 2.
No approximate values are given for bushings mounted into light alloy housings, because the influence of the housing design and the material is too strong. In such cases the required mandrel diameter must be determined by tests.
Diameter of calibration mandrel = dK
Bushing width = B
Minimum hardness = 50 HRC
Roughness RZ ~ 1 µm
Valid for steel housings with DG/D = 2