This standard specifies the types and dimensions of flattened straight shank conical ball head mold milling cutters. This standard applies to flattened straight shank conical ball head mold milling cutters with a diameter of 6 to 12 mm.
JB/T 7966.7-1999 history
1999JB/T 7966.7-1999 Die milling cutters Part 7: Flat type conical ball end mills with straight shank