Mitutoyo Disc Micrometer with Non-Rotating Spindle & SPC Output The Disk Micrometer is designed to easily measure root tangent length of spur gears and herical gears. Non-rotating spindle eliminates torque on workpiece. This Quickmike style micrometer offers a speedy spindle feed of 10mm per revolution. Features include... 0-1.2" / 0-30.48mm Measuring Range 0.00005" / 0.001mm Resolution Diameter of measuring disk: 20mm / .787 0.7mm / .028 edge thickness to enter narrow recesses. With Ratchet Stop for constant force. With SPC output. Supplied in fitted plastic case. Functions include... Origin-set Zero-setting Data hold Data output inch/mm conversion Alarm: Low voltage