Upper support for turning machines

A rotatable upper support for horizontal turning meachines, which has an upstanding turning tool carrier with turning tools interchangeably fastenable thereto, said tools adapted to be changed over at will for normal or overhead turning, wherein the improvement comprises said turning tool carrier (12) being constructed symmetrically about its horizontal mid-plane (22) which is arranged to lie at the height of the axis of rotation and having on each of its face sides (23) means for mounting the turning tool (24), and means are provided for shifting the turning tool carrier (12) in the direction of its longitudinal axis in exactly fixed increments with said turning tool carrier (12) including a plurality of hardened steel block means each having grooves (17) therein, the spacing of said grooves permitting shifting of the carrier (17) and there being provided a shaft (19) running parallel to the turning tool carrier and a rotatable disk (20) trimmed on one side and fastened to said shaft for rotatable engagement with said grooves for positionally adjusting said carrier.