Patent ID: 7325324

Claim:
A method for checking the diameter of a cylindrical part, rotating about a geometrical axis, in a numerical control grinding machine including a worktable, defining said geometrical axis, and a grinding-wheel slide carrying a grinding-wheel, by means of an apparatus with a reference device, a measuring device movable with the reference device, coupling elements movably connected to the grinding-wheel slide and carrying the reference device and the measuring device, and at least one pair of mechanical abutting surfaces, the method comprising: controlling movements of the coupling elements for displacing the reference device towards the cylindrical part to be checked, the mechanical abutting surfaces of said at least one pair cooperating with each other and guiding said movements, and causing, in the course of said movements, a contact between said reference device and the rotating cylindrical part, and a disengagement of the mechanical abutting surfaces of said at least one pair.