Tangential thread-rolling head

A tangential thread-rolling head comprising two fork-shaped rolling head arms in which thread-rolling dies are rotatably supported by means of parallel axles wherein the thread-rolling dies are in a lateral engagement with a pinion seated on the axles of a gearing coupling both thread-rolling dies and the thread-rolling dies and pinions have lateral jaws such that the jaws of the thread-rolling dies can be pushed into the jaws of the pinions laterally before the axles are mounted wherein the axles have disposed thereon an axially slidable bushing which is adapted to firmly be positioned axially against the pinion with the aid of locating means, characterized in that each bushing (50) circumferentially has a fine pitch threaded portion (52) which interengages with a female-threaded portion (52a) in a seating bore (48) for the pinion (46) and bushing (50) and locking means are provided in the rolling head arms (10, 12) to lock the bushing (50) in an occupied rotational position.