本标准涉及带自动换刀器的数控加工中心的基本刀架柄和保持旋钮的标准化。本文中包含的要求旨在提供具有各种类型自动换刀器的加工中心之间的刀夹互换性。锥角控制的尺寸符合国际标准ISO-1947。本标准将提高对“CAT”刀架及其相关部件和标称操作值的理解。它将基本机床夹具接口的主要部件刀具夹具柄和主轴接收器几何结构、拉力螺栓和锥形锥度信息统一到一个单一的参考源中，提供即时信息访问。 此新信息还消除了歧义，并为刀架/主轴界面的所有方面建立了绝对性。适用于:设计、制造、使用或维护陡峭锥度（7:24）刀架及其辅助部件的人员。

This Standard pertains to the standardization of a basic tool holder shank and retention knob for numerically-controlled machining centers with automatic tool changers. The requirements contained herein are intended to provide tool holder interchangeability between machining centers with automatic tool changers of various types. The dimensions for cone-angle control are in accordance with the International Standard ISO-1947.This Standard will improve the understanding of the "CAT" toolholder, its associated components, and nominal operational values. It unifies the principle components of the basic machine tool holder interface—toolholder shank and spindle receiver geometry, pull stud, and conical taper information—into a single-source reference, providing instant access to information. This new information also eliminates ambiguities and establishes absolutes for all aspects of the toolholder/spindle interface.Intended for: Those involved in the design, manufacture, use, or maintenance of steep-taper (7:24) toolholders and their ancillary components.