This Standard pertains to the standardization of basic toolholder shank, retention knob, and socket assemblies for numerically controlled machining centers with auto-matic tool changers. The requirements contained herein are intended to provide toolholder interchangeability between machining centers with automatic tool chang-ers of various types. This Standard is the inch solution for basic toolholder shank, retention knob, and socket assemblies. This design specifies an interchangeable retention knob with a 45-deg clamping surface.
