Properties sliding bearing material

If narrower bushings are required for certain applications, these 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 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 some cases the bore can be calibrated using a mandrel when using GLYCODUR F bushings (see figure).

dK = diameter of calibration mandrel B = bushing width Minimum hardness: 50 HRC Roughness: RZ ≈ 1μm (40 μin)

When installing a GLYCODUR F bushing with an exterior diameter D in a steel housing with the exterior diameter D_G, the adjacent diagram will show the approximate values for the required D_K of the calibration mandrel (= d + D_ΔK ). This diagram shows the required oversize D_ΔK of the calibration mandrel as a function of the desired expansion Δd of the bushing bore for various nominal diameters d of the bushing bore; it is valid for the ratio D_G / 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.

Calibration behaviour of GLYCODUR F-bushings