CMM Steel Disc Stylus Features include... 18mm (0.71") Disc Diameter 1.6mm (0.07") Disc Depth 2.5mm (0.10") Roller Depth 4.2mm (0.17") Stem Diameter M2 Thread Disc styli are designed to inspect undercuts and grooves within bores which may be inaccessible to star styli. A range of disc styli offers a radius end roller to enable groove width measurement. Silver steel tips are heat treated and precision ground to a high tolerance.
