• Planetary units with helical gears, rather than spur gears, have higher torque capacity and run quieter. • Different manufacturers measure and rate backlash in different ways. • Software tools for ...
The Epicyclic gearbox was devised in 1781 (as a sun and planet gear) by James Watt for use in conjunction with his steam engines. The concept was adopted in 1902 by Sturmey and Archer for a ...
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