Semi-automatic band saw machine with independent downward stroke (by the saw bow's own weight), ball bearing mounted mitre adjustment 60° left and up to 45° right with fixed detent points at 0°.45°, 60° left and 45° right, other angles can be set using the scale Cutting of metal profiles and solid material (steel, stainless steel, brass, aluminium, copper). For an optimal cutting process the operator has the choice between manual operation, manual down stroke, the speed of which is regulated by a hydraulic brake, or the "AUTOCUT SYSTEM", in which the weight of the bow is used to independently execute a cutting cycle with adjustable down stroke.