IS 19153 : Part 1 : 2025/ISO 6336-1 : 2019 Calculation of Load Capacity of Spur and Helical Gears - Part 1 Basic Principles, Introduction and General Influence Factors
NATIONAL FOREWORD
This Indian Standard (Part 1) which is identical to ISO 6336-1 : 2019 'Calculation of load capacity of spur and helical gears - Part 1: Basic principles, introduction and general influence factors' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Transmission Devices Sectional Committee and approval of the Production and General Engineering Division Council.
This standard presents the basic principles of, an introduction to, and the general influence factors for the calculation of the load capacity of spur and helical gears. Together with the other standards in the ISO 6336 series, it provides a method by which different gear designs can be compared. It is not intended to assure the performance of assembled drive gear systems. It is not intended for use by the general engineering. Instead, it is intended for use by the experienced gear designer who is capable of selecting reasonable values for the factors in these formulae based on the knowledge of similar designs and the awareness of the effects of the items given in the standards.
Spur gears offer the simplest design, with straight teeth parallel to the gear axis. Conversely, helical gears have teeth cut in the form of a helix over the cylindrical blank. Both spur gears and helical gears are used to transmit power between a parallel driver and driven shafts.
This standard is published in five parts. The other parts in this series are:
Part 2 Calculation of surface durability (pitting)
Part 3 Calculation of tooth bending strength
Part 5 Strength and quality of materials
Part 6 Calculation of service life under variable load
The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.