A small precision spindle designed for both high speed drilling and milling operations. Air Motor is capable of 21,500 RPM with direct drive or lower RPM's with integral planetary gears. Gear train has been designed for long life with needle bearings inside each gear. Uses standard RD 16 collets. A set of 10 collets will hold all tools from 0.5mm(0.020") up to 10mm(0.3937").