Specification for worm gearing - Imperial units Ingestion-build-134498 This document specifies methods for

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Specification for worm gearing - Imperial units Ingestion-build-134498 This document specifies methods for1 Scope This British Standard applies to worm gearing and comprises cylindrical involute helicoid worms and worm wheels conjugate thereto, the dimensions of which are expressed in inches, Four classes of gears are provided which are related to function and precision. The range of modules is given in convenient steps from 0. 052 to 1. This standard does not refer to pairs of cylindrical gears connecting non parallel axes known as crossed helical gears.