what is h7 surface finish
Metal tolerances Standard steel tolerances can be used with Vesconite bearings. Housings: H7 Shafts: h7. Surface finish Housings The surface finish on the housing is not critical as there is no movement after installation. For the purpose of installing the bearing the cut must not be too coarse.Lead in chamfers are required to ensure that the bearing does not score when been installed.Shafts The surface finish of the shaft is very important to ensure a correct operation of the bearing. A good finish of the order of 2.5 Âµm Ra (20 micro inch Ra) should be provided on shaft surfaces for an optimum wear life.For shafts with an axial motion relative to the bearing, a finish of the order of 0.5 Âµm Ra (20 micro inch Ra) should be provided on shaft.Rough surface finishes and corroded and scored shafts will cause wear of Vesconite bearings and should be avoided.ead in chamfers are required to ensure that the bearing does not score when been installed. Shafts The surface finish of the shaft is very important to ensure a correct operation of the bearing. A good finish of the order of 2.5 Âµm Ra (20 micro inch Ra) should be provided on shaft surfaces for an optimum wear life.