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These 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 output shaft's variable pulley, changing the speed of the chuck. A tensioner pulley is implemented in the belt transmission to take up or release the slack in the belt as the speed changes.
From the Manufacturer
The J-A5818 15" Variable speed floor drill press boasts a 1 HP 230/460v motor with speeds from 400-50000 RPM. The large 2-1/4" quill allows for greater accuracy while the 3" column promotes maximum head support.
