TFS series sprag type freewheel clutches have an outer race designed for press fit installation to the housing. Correct interference dimensions of the outer race must be maintained to obtain maximum bearing and clutch performance. The internal diameter of the housing should meet the H6 tolerance. Keyways should be made in the end faces of the clutch for proper installation. If the tolerance of the internal diameter of the housing is K6, keyways are not required on the end faces of the clutch. Make sure the housing has enough strength to withstand the pressure required for the press fitting installation of the clutch. When installing the clutch, mount it with a type 62 bearing to avoid radial force, since this clutch does not have any bearings inside. Mount the clutch ensuring that the shaft driving direction is in the direction indicated by the arrow on the cover plates. The recommended shaft tolerance is H6. Suitable surface pressure of the key should be selected according to your company design standards.