scope:

Covers the minimum enquirements for enclosed, precision single and double helical one and two stage speed increasers and reducers of parallel shaft design with pinion speeds of 3000 min, or greater, or pitch line velocities of 25 m/2 or greater, for special purpose, applications. Such applications will typically be required to operate continuously for extended periods, without installed spare equipment and are critical to the continued operation of the installation. By agreement it may be used for other services.