Pinion and reducer: , the paralleli

Pinion and reducer: , the parallelism check must be carried out furnace on the surface vertical than on the horizontal side of the tooth generator, after approaching the pinion to the rack according to the nominal dimension shown on the drawing. The parallelism tolerance must be verified as a contact strip of the opposite generators of the rack and pinion teeth, ie the difference in the distances between these, measured at both ends, must be contained in 0.1mm. Further checks (head-to-bottom distance between teeth, contact strip) must be made with the oven rotating. As regards the gearbox, it must be verified that the tightening torques of the screws that fix the gear reducer locking half-rings on the driven shaft.