Designed to be strong, fast, and heavy, the bench-top Professor 2.2 CNC router is built with a cast iron frame, machined cast aluminum gantry, black anodized aluminum tables, large precision ball screws, and CSA-certified high-performance electronics. For the motor spindle, The Professor 2.2 uses a Bosch 2.25 HP variable speed router with 1/4” and 1/2” collet chucks. Optional high precision collets are available in sizes ranging from 1/8” to 1/2”. The Bosch motor offers 7” of Z travel also utilizing a heavy-duty 5/8” ball screw and stepper motor. Professor CNC – for the best in reliability, endurance, and ease-of-use. CWIMachinery.com