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The worm that turned.
Holroyd has been showing off some of its driving and controlling wormgears for applications in lifts, subway trains and mining locomotives.
In axle drives of mining locomotives moving down a slope the transmission drive is subjected to an overdriving situation with the wormwheel driving the worm.
Similar conditions are said to apply in lifts where overdriving occurs at certain conditions.
For both applications, Holroyd has produced wormgears with a special tooth contact …
