SK40 facemill holder, also called facemill arbour and facemill adaptor

SK40 FMA22 is mainly used to hold a Modular Indexable Cutter with an internal hole of 16 mm. Any cutter can come with a 22 mm Internal thread, but 50 mm and 63 mm Cutters are more common in this range.

Made from alloy steel hardened to 54 56rc
Balanced to G6.3 at 12,000 rpms
Concentricity is less than .005 micron up to 100 Length and 0.012 up to 200 Length.
All critical tool holder surfaces are precision-ground
Gage length is 50MM,100MM,150MM,200MM,250MM,300MM
Rear thread for pull stud is M16 X 2.0