National foreword

This British Standard is the UK implementation of ISO 5686‑3:2024.

The UK participation in its preparation was entrusted to Technical Committee W/-, Consumer Products and Services Sector Policy and Strategy Committee.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2024.

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO document should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

ISO draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s) which may be required to implement this document. However, implementers are cautioned that this may not represent the latest information, which may be obtained from the patent database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.

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This document was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 9, Tools with defined cutting edges, holding tools, cutting items, adaptive items and interfaces.

A list of all parts in the ISO 5686 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

1 Scope

This document specifies the dimensions of polygonal taper receivers with flat contact surface (PTI). These receivers are the machine-side part of the interface to the (in cutting process non-rotating) tool carrier of machine tools (e.g. turret lathes, turning centres).

This document specifies four types of machine-side interface types, which differ at the face contact. The bores for receiving the tool shanks themselves are designed identically for all types.

Receiver type F has one hole for the coolant supply (F = fluid); PTI-F type tool holder can be installed in 0°- and 180°-position.
Receiver type H has a primary coolant hole for the main supply and a secondary coolant hole for an intermediate tool position on the face contact (H = half). For PTI type H holders an installation position offset by 180° is not possible.
Receiver type A has one hole on the face contact for the primary coolant supply and one additional hole for supplying the tool holder (driven tool) with sealing air (A = air). Two more bores allow the installation of PTI-A holders with spring-type straight pin in 0°- and 180°-position.
Receiver type X has a primary coolant hole for the main supply and a secondary coolant hole for an intermediate tool position on the face contact. In addition, the type X receiver has one hole for supplying the tool holder (driven tool) with sealing air and two bores for the 0°- and 180°-position of the spring-type straight pin of PTI-A holders.

2 Normative references

3 Terms and definitions

4 Polygonal taper receivers, types and dimensions

4.1 General

4.2 Polygonal taper receiver, Type F

4.3 Polygonal taper receiver, Type H

4.4 Polygonal taper receiver, Type A

4.5 Polygonal taper receiver, Type X

4.6 Dimensions

5 Design

5.1 Fastening of the PTI tool holders

5.2 Clamping forces

5.3 Material and heat treatment

6 Designation

Bibliography

BS ISO 5686-3:2024

Polygonal turret interface with flat contact surface - Coupling for driven tool holders with shanks of type F and A

Current

Published:

31 Oct 2024