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Specified pitches and prospects of the worm do not permit the worm gear to generate the worm. This is helpful when the software wants to lock the output if the application is managing in the opposite route. When the helix angle is much less than 5°, the worm is self-locking. When the helix angle is greater than 10°, the worm can be driven back. Worm and worm equipment assemblies have to be mounted on vertical, non-intersecting shafts.

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