Sealey Pillar Drill Floor Variable Speed 1630mm Height GDM200F/VSVariable speed model allows stepless control of drilling speed between minimum and maximum enabling finer control of finish and tolerance. The belt transmission uses two spring tensioned cone pulleys, the diameters of which can be adjusted by moving a centre idle pulley with the speed adjustment control lever. Safety devices fitted include a no volt release switch, allowing insurance company approval for use in educational establishments. Supplied