ISO 7388-1-2007 PDF

Full title and description

Tool shanks with 7/24 taper for automatic tool changers — Part 1: Dimensions and designation of shanks of forms A, AD, AF, U, UD and UF. This International Standard specifies the principal dimensions and designation system for these tool shank forms used with automatic tool changers.

Abstract

Specifies the dimensions of tool shanks with a 7/24 taper for automatic tool changers, covering shank forms A, AD, AF, U, UD and UF (including two possible additions for each). The standard is intended for tools used with machine tool automatic gripping systems and aligns key interface dimensions with corresponding spindle-nose requirements (see ISO 9270).

General information

• Status: Published.
• Publication date: 2007-08 (Edition 2 published 30 July 2007).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.060.20 (Dividing and tool-workpiece holding devices).
• Edition / version: Edition 2 (2007).
• Number of pages: 7.

Scope

Defines the dimensional specifications and designation rules for 7/24 taper tool shanks of forms A, AD, AF, U, UD and UF used with automatic tool changers. It covers the critical interface dimensions required for reliable gripping, locating and transfer between the tool magazine and the spindle, and is intended to ensure interchangeability with spindle noses designed to the complementary ISO 9270 series.

Key topics and requirements

• Definition of shank forms A, AD, AF, U, UD and UF and permitted additions for each form.
• Dimensional specifications for 7/24 taper shanks (major/minor diameters, lengths, tenon/flat features where applicable).
• Designation and marking conventions for identifying shank forms and sizes.
• Interface compatibility requirements with spindle noses (cross-reference to ISO 9270 series).
• Requirements aimed at ensuring interchangeability and reliable automatic tool changing.

Typical use and users

Used by machine tool designers, toolholder and tooling manufacturers, CNC machine builders, tooling departments, maintenance engineers and standards committees to specify, produce or verify tool shanks intended for automatic tool changers. Also used when selecting compatible tooling and spindle interfaces for production machining centers.

Related standards

Closely related to ISO 7388-2:2007 (Part 2 — dimensions and designation of shanks of forms J, JD and JF) and to the ISO 9270 series (7/24 taper spindle noses for automatic tool changers — dimensions and designation of spindle noses), which together define complementary tool/spindle interfaces for automatic tool changing systems. The 1983 edition of ISO 7388-1 was withdrawn and superseded by the 2007 edition.

Keywords

tool shank, 7/24 taper, automatic tool changer, ATC, toolholder, spindle nose, ISO 7388, ISO 9270, shank forms A AD AF U UD UF, interchangeability

FAQ

Q: What is this standard?

A: An ISO International Standard that specifies dimensions and designation rules for tool shanks with a 7/24 taper used in automatic tool changers (shank forms A, AD, AF, U, UD and UF).

Q: What does it cover?

A: The principal geometrical dimensions, form definitions and designation conventions necessary to ensure mechanical and functional interchangeability of tool shanks used with automatic gripping systems and compatible spindle noses.

Q: Who typically uses it?

A: Machine tool manufacturers, tooling and toolholder suppliers, CNC engineers, maintenance staff, and standards or procurement teams specifying tooling interfaces for machining centers.

Q: Is it current or superseded?

A: The Edition 2 (2007) version is the current published edition; the earlier 1983 edition was withdrawn and replaced by the 2007 edition. The 2007 edition has been subject to periodic review and confirmation by ISO.

Q: Is it part of a series?

A: Yes — it is Part 1 of the ISO 7388 series; Part 2 (ISO 7388-2:2007) covers shank form J variants. The ISO 9270 series defines complementary spindle-nose dimensions for mating with the shanks specified in ISO 7388-1.

Q: What are the key keywords?

A: 7/24 taper, tool shank, automatic tool changer, ATC, shank forms, spindle nose, interchangeability, ISO 7388-1.