UNDER-FLOOR WHEEL LATHE MACHINE HAVING ADJUSTABLE TRACK WIDTH

Represented and described is an underfloor wheel set processing machine, in particular an underfloor wheel lathe (1′) for reprofiling wheels and brake discs of wheel sets (20) of rail vehicles, comprising: a machine stand (3), a crossbeam (2) for bridging a workshop track (4) with at least two rails (4A, 4B, 4C) in the transverse direction, two roller carriers (7A, 7B), at least four friction rollers (8), at least one friction roller drive (9) to drive the friction rollers (8) and at least one axial guide roller (19) to axially guide the wheel set (20), wherein the machine stand (3) has a first part (3A) and a second part (3B), wherein the crossbeam (2) is supported on both parts (3A, 3B) of the machine stand (3), wherein the roller carriers (7A, 7B) are movably connected to the machine stand (3), and wherein the friction rollers (8) are rotatably supported on the roller carrier (7A, 7B). In order to adjust to wheel sets (20) with different track widths, it is proposed for the first part (3A) of the machine stand (3) and the second part (3B) of the machine stand (3) to be displaceable relative to one another in the transverse direction.