Tangential thread roll head

The invention relates to a tangential thread roll head comprising two forked roll head arms in which a thread roll is rotatably supported on a shaft, is engaged with a transmission device coupled to the thread roll, can be inserted from a side into a mounting position in the roll head arm prior to the shaft installation, wherein one of the shafts can be inserted into the support holes of the thread roll, a thread roll has a thread profile formed on a peripheral surface thereof, the thread roll has a roll engagement mechanism, the roll engagement mechanism is engaged with a transmission engagement mechanism of the transmission device, and the roll engagement mechanism and the transmission engagement mechanism are configured such that the thread rolls are inserted into the mounting position only from a side in a uniquely defined rotational position, wherein the rotational position is different for the two thread rolls so that the thread profiles of the thread rollers are staggered from each other at the mounted