This International Standard specifies dimensions for spindle noses for use with adjustable adaptors and quick-change adaptors used in multi-spindle heads.
It specifies requirements for three types of adjustable adaptors to fit taper shank drills, reamers and spot-facing cutters, used in multi-spindle heads.
DS/ISO 2905:1989 history
1989DS/ISO 2905:1989 Modular units for machine tool construction. Spindle noses and adjustable adaptors for multi-spindle heads