Specification for worm gearing - Metric units Ingestion-build-109673 boiler drums

boiler drums

1 Type of inspection

Sampling and sample reduction

BS EN 792-13 does not apply to stapling pliers and vibration hammers

installers and maintainers of earthing and lightning protection equipment

Specification for worm gearing - Metric units Ingestion-build-109673 boiler drums1 Scope This Part of BS 721 specifies the requirements for worm gearing based on axial modules. Four classes of gear are specified, which are related to function and accuracy. This Part applies to worm gearing comprising cylindrical involute helicoid worms and wormwheels conjugate thereto. It does not apply to pairs of cylindrical gears connecting non parallel axes known as crossed helical gears. Appendix A gives some typical wheel rim sections