To finish bevel gears, SPIRAL INGRANAGGI can use a grinding processing. With this operation, small strains deriving from the heat treatment can be corrected, by positioning the contact in the requested position, reducing the functioning noise. This operation is a sort of coupling between the pinion and the crown that gear up together, they are tested on a Gleason tester and identified with the same coupling number to be rigorously mounted together.
SPIRAL INGRANAGGI is equipped with “lappers” for the grinding and tester for the subsequent check.
Hardened bevel gears with an hardness of HRC 59–62 are subject to deformations due to the heat treatment.
By the grinding process it is possible to have and to maintain topographies within the range of few microns, as well as for the teeth thickness, to optimize the contact and the roughness degree.