Co-operating organizations

The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations:—

Admiralty^*

Air Ministry

Associated Offices Technical Committee

Association of Consulting Engineers (Incorporated)

British Chemical Plant Manufacturers’ Association

British Compressed Air Society

British Electrical & Allied Manufacturers’ Association^*

British Engineers’ Association^*

British Internal Combustion Engine Manufacturers’ Association

British Iron & Steel Federation

British Railways, The Railway Executive

Crown Agents for the Colonies

Department of Scientific & Industrial Research

Engineering Equipment Users’ Association

Institute of Marine Engineers^*

Institute of Petroleum

Institution of Civil Engineers

Institution of Gas Engineers

Institution of Heating & Ventilating Engineers

Institution of Mechanical Engineers^*

Institution of Mechanical Engineers (Automobile Division)^*

Institution of Production Engineers^*

Locomotive Manufacturers’ Association^*

Machine Tool Trades Association

Ministry of Fuel and Power

Ministry of Labour & National Service (Factory Department)

Ministry of Supply^*

Ministry of Transport

Ministry of Works

Office of the High Commissioner for India^*

War Office

The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following were directly represented on the committees entrusted with the preparation of this British Standard:—

Bright Steel Bar Association

British Cycle & Motor Cycle Manufacturers & Traders Union Ltd.

British Internal Combustion Engine Research Association

Gauge & Tool Makers’ Association

Institution of Engineers & Shipbuilders in Scotland

Milling Cutter & Reamer Trade Association

National Physical Laboratory

North East Coast Institution of Engineers & Shipbuilders

Society of British Aircraft Constructors Ltd.

Society of Motor Manufacturers & Traders

Taper Pin Manufacturers’ Association

This British Standard, having been approved by the Mechanical Engineering Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Council on 20 December 1951

First published November 1929

First revision January 1935

Second revision December 1951

Foreword

This standard makes reference to the following British Standards:—

BS 122, Milling cutters and reamers.

BS 240‑1, Methods and tables for Brinell hardness testing.

BS 970, Wrought steels.

The British Standard for solid and split taper pins was first published in 1929. In the first revision issued in 1935, a hardness test on the finished pins was substituted for the tensile test previously specified.

The present revision has been prepared under the authority of Mechanical Engineering Industry Standards Committee primarily to introduce amendments to the requirements relating to the quality of the material and the mechanical tests so that the standard may be in accordance with modern production methods.

The previous edition related to a single class of mild steel pin. In this revision, provision is made for four classes of pins, with appropriate hardness and bend tests. The table of standard sizes of pins has been extended to include larger sizes.

It has been confirmed that the fractional size pins shall be those regarded as British Standard. It is appreciated that number size pins are still largely used and to facilitate a change to the British Standard fractional sizes, a comparison between these and the number sizes is given in Appendix B. The fractional size taper pins tabulated in this Standard are adequate to cover any necessary conversion from the number sizes; for suitable reamers, reference should be made to BS 122, “Milling cutters and reamers”. It is strongly recommended that, in future, only fractional size pins be used.

To facilitate the selection of suitable drill sizes, details of the minimum and maximum diameters, calculated in relation to the permissible diametral longitudinal and taper tolerances, have been included in Appendix A.

A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 9 and a back cover.

This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.

Obsolescent (by Amendment No. 2). The need for the product covered by this British Standard has been reviewed and it has been decided that, in the interests of rationalization, it should be regarded as obsolescent and not therefore used for new designs. The standard will be withdrawn in due course.

1 General

2 Material

3 Manufacture

4 Dimensions

5 Limits of tolerance on dimensions

6 Hardness test

7 Bend test

8 Number of hardness and bend tests

9 Packaging

10 Inspection

11 Testing facilities

BS 46-3:1951

Keys and keyways and taper pins - Specification for solid and split taper pins for general engineering purposes

Current

Published:

20 Dec 1951