The patented double turbine 722MX drops in to give you 65,000 rpm. The 722MX accelerates your production and is ideal for micro tools. Low vibration motor with just 2 moving parts, no gears, vanes, or brushes to burn up. Durable ceramic bearings. Ideal for lathes, swiss automatics, robotics and finishing. Mountable area of 22mm by 90mm. Also available with 20, 30 and 32 mm outside diameters.