Abstract: A profile plano-type knurling machine relates to metal pressure shaping machinery. It is more expedient to use the present invention for working splined shafts, polygonal parts and gears. In the present knurling machine a device for moving knurl rollers in the radial direction relative to the centers has tapered elements kinematically associated with the knurl rollers and pressure members whereas only one pressure member intended to provide the radial feed of the knurl rollers is installed on the fixed support member at the side of the bases of the tapered elements coaxially to the centers and adapted for actuating simultaneously all the tapered elements through an intermediate part located between said pressure member and the bases of the tapered elements. This technical solution provides for a considerable improvement of the machine efficiency and its reliability in operation as well as processing accuracy of the work pieces being machined.

Abstract: The invention relates to mechanical engineering.The proposed machine comprises parallel stationary crossbars rigidly interconnected by slides and carrying centers for positioning a workpiece. Mounted on the slides, between the stationary crossbars, and adapted for reciprocating motion along the centers' axis is a movable crossbar with a knurling head in whose housing there are provided radial slots, wherein there are installed sliders with knurls, said sliders being movable in said slots by a device comprising self-braking wedges installed in pairs in each radial slot and stops interacting with said wedges, which stops are mounted on the stationary crossbars and being adapted for reciprocating motion.