To provide an automatically marking press of an excellent workability without generating a crack on a work by stabilizing a depth of a stamp (a timing mark) in a marking press for the timing mark wherein a plurality of timing marks are marked on the work equipped with a cylindrical surface.
A work support part supporting freely rotatably a work 71, a plurality of jig support parts 12, 15 supporting a plurality of marking jigs 11, 14, and a drive means transferring a plurality of the jig support parts 12, 15 are provided. Then, a plurality of the marking jigs 11, 14 pinch the work from 180° symmetrical positions. One marking jig 11 moves its tangential direction to one side, and the other marking jig 14 moves the tangential direction to the reverse side. A plurality of timing marks are marked on an outer peripheral surface 71b of the work 71 while the work 71 is revolving on the spot.
ARITA KENJI