Abstract: A band saw and its supporting and drive pulleys and motor is mounted on a saw support frame having spaced end members. The end members have slideways co-acting with slides on spaced support arms pivoted to opposite ends of a work support. Locks selectively fix the arms in adjusted positions. An hydraulic cylinder is connected to raise and lower the support frame end members relative to the work support. Racks on the support arms co-act with connected pinions on the saw support frame to hold the saw frame aligned with the arms.An adjusting screw on the underside of the bed is releasably engaged by blocks on the underside of the clamp jaw having opposed tooth sectors. The blocks are biased to tooth engaging position, and a cam on the clamp jaw spreads the blocks for quick slide adjustment.