ISO 7388-2-2007 PDF

Full title and description

Tool shanks with 7/24 taper for automatic tool changers — Part 2: Dimensions and designation of shanks of forms J, JD and JF. This International Standard specifies the dimensional requirements and designation system for tool shanks with a 7/24 taper of shank form J (and its JD and JF variants) intended for use with automatic tool changers on machine tools.

Abstract

ISO 7388-2:2007 specifies the dimensions of tool shanks with a 7/24 taper of shank form J (with two possible additions for each) for automatic tool changers used on machines having an automatic gripping system for feeding tools from the magazine to the spindle and vice-versa. The standard defines the principal dimensions required for correct engagement with spindle noses according to ISO 9270.

General information

• Status: Published (International standard, confirmed in systematic reviews).
• Publication date: 2007-08 (Edition 2 published July/August 2007).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.060.20 (Dividing and tool‑workpiece holding devices).
• Edition / version: Edition 2 (ISO 7388-2:2007).
• Number of pages: 7.

Scope

This part of ISO 7388 specifies the dimensional characteristics and the designation of tool shanks of form J (including JD and JF additions) with a 7/24 taper for use with automatic tool changers. It applies to tools used on machines equipped with automatic gripping systems for transferring tools between magazine and spindle, and it sets the key dimensions needed for compatibility with corresponding spindle noses (see ISO 9270 series). It does not cover retention knobs or other accessory items standardized elsewhere.

Key topics and requirements

• Dimensional definitions for shank form J and its JD and JF variants (principal lengths, taper geometry and designation format).
• Specification of the 7/24 taper geometry used for automatic tool changer shanks.
• Design guidance to ensure interchangeability with spindle noses standardized in the ISO 9270 series.
• Designation conventions for shank identification to ensure correct selection and documentation in tool magazines and technical drawings.
• References to related ISO documents (for example spindle nose dimensions and other shank forms covered in ISO 7388-1).

Typical use and users

Used by CNC machine tool manufacturers, toolholder and tooling suppliers, toolroom and maintenance engineers, machine tool designers, production planners and standards committees to ensure mechanical interchangeability of tool shanks and spindle noses in automatic tool‑changing systems. The standard is also used by technical authors for drawings, procurement specifications and CAD libraries.

Related standards

Relevant related standards include: ISO 7388-1:2007 (Dimensions and designation of shanks of other forms A, AD, AF, U, UD and UF); and the ISO 9270 series (7/24 taper spindle noses — parts 1 and 2) which define the matching spindle‑nose dimensions for shanks covered by ISO 7388 parts. Earlier versions of ISO 7388-2 (1984) were withdrawn and replaced by the 2007 edition.

Keywords

Tool shank, 7/24 taper, automatic tool changer, shank form J, JD, JF, spindle nose, toolholding, ISO 7388, ISO 9270, interchangeability, CNC.

FAQ

Q: What is this standard?

A: ISO 7388-2:2007 is an International Standard that specifies dimensions and designation rules for tool shanks with a 7/24 taper of shank form J (including JD and JF variants) intended for automatic tool changers.

Q: What does it cover?

A: It covers the principal dimensions, taper geometry and designation of shanks of forms J, JD and JF so they correctly mate with corresponding spindle noses and function with automatic tool‑changing systems. It focuses on dimensional and designation requirements, not on tool materials or manufacturing processes.

Q: Who typically uses it?

A: Machine tool manufacturers, tooling and toolholder suppliers, design and maintenance engineers, CAD/CAM librarians and procurement specialists use this standard to ensure interchangeability and correct specification of tool shanks for automatic tool changing systems.

Q: Is it current or superseded?

A: ISO 7388-2:2007 (Edition 2) is published and has been through ISO systematic reviews; the 2007 edition is the current edition published to replace the 1984 edition and has been confirmed in subsequent reviews. For the latest confirmation status consult the ISO catalogue entry for this standard.

Q: Is it part of a series?

A: Yes — ISO 7388 is a multi‑part series covering tool shanks with 7/24 taper for automatic tool changers. Part 1 covers shank forms A, AD, AF, U, UD and UF (ISO 7388-1:2007) and Part 2 covers J, JD and JF (this document). The ISO 9270 series defines the matching spindle‑nose dimensions.

Q: What are the key keywords?

A: Key keywords are: tool shank, 7/24 taper, automatic tool changer, shank form J, JD, JF, spindle nose, ISO 7388, ISO 9270, interchangeability.