JET J-A5816, 15" Variable Speed Floor Model Drill Press 115/230V 1PhThese JET Drill Presses use a variable speed motor with the stepped pulley system, and come equipped with a continuously variable transmission. This enables use at a wide range of speeds, as well as the ability to change speed during operation. A scale marked hand wheel that matches the desired machine speed is mounted to a reduction gearing system for precise operator control. This adjusts the gearing ratio between the motor's fixed pulley and the