This Standard provides formulae for the design of rotating steel shafts that are subjected to torsional, bending and axial-tensile loads either singly or in combination, on the basis of infinite life. The Standard does not cover specially developed shafts, for example, those involving extensive laboratory and field testing, heat treatment and like developments, or to shafts for specific applications such as automotive and construction equipment transmissions. NOTES: 1 Particular consideration has to be given to deflections of long shafts where the effects of out-of-balance forces tend to induce ‘whipping’, and to long shafts that are subject to buckling due to compressive loading (see Foreword). 2 The use of this method of shaft design enables justification of the use of shafts of minimal diameter. Where the designer conservatively sizes a shaft, then only those calculations necessary to ensure that the shaft complies with this Standard (see Clause 5) are required. 3 A ‘trial’ shaft diameter is given in Appendix A. 4 An interactive method for calculating minimum diameter of shaft is given in Appendix B. 5 Characteristics of motor controllers and torque-limiting devices are provided in Appendix C. 6 A typical worked example for crane driving mechanism is provided in Appendix D. 7 A typical worked example for crane hoist drive is provided in Appendix E. 8 A typical worked example for conveyor drive is provided in Appendix F.

First published as AS B249-1969.Revised and redesignated as AS 1403-1979.Second edition 1984.Third edition 1985.Fourth edition 2004.Reconfirmed 2016. Originated as AS B249-1969. Previous edition AS 1403-1985. Fourth edition 2004.