Can the cutting tool be moved and adjusted along the Z-axis?
With Richmill’s Milling Chucks, needle bearings uniformly hold the gripping area, so the cutting tool can be moved and adjusted long the Z-axis. The cutting tool can only be gripped when in a fixed position, so it cannot be moved or adjusted. Total indicator runout (TIR) Through slanting of the needle bearings, the operation of screws has been replaced with the turning of a lock ring. This makes possible both the uniform elastic deformation of the cutting tool’s steel and the uniform tightening of the Milling Chuck’s inner diameter. As a result, the TIR of a 4-inch edge has been found in tests to be 0.0004 inch. Endmills use set screws to hold the cutting tool, from its side, in the center of their holder. Consequently, they are incapable of uniform elastic deformation of the cutting tool’s steel, so that the TIR with a 4-inch edge is 0.0008-0.0010 inch (according to JIS data). Suitable or not for high-rpm machines? Since Richmill’s Milling Chucks hold the cutting tool at their center,
