Heavy duty cast-iron head, column and base built for steady vibration free performance. Head slides on precision machined cast-iron dovetail ways - stroke is controlled by a gas head-cylinder for smooth operation. Head tilts up to 30° left or right for angled mortising, and pivots up to 180° for off table mortising. Totally enclosed fan cooled (T.E.F.C.) motor with start capacitor for smooth start-up and longer running life.