Do the Worm and Worm Wheel Need to Have the Same Rotation Direction?

[LaCorbin]

The worm and worm wheel have the same rotation direction. Here is some related knowledge about worms and worm wheels: Contact Stress: When two meshing gear teeth come into contact, the action and reaction forces between the tooth surfaces generate contact stress. Since the position of the meshing point changes and the gears undergo periodic motion, the contact stress varies in a pulsating cycle. Effects of Contact Stress: Under prolonged exposure to this alternating contact stress, small cracks may appear at the tool marks on the tooth surfaces. Over time, these cracks gradually expand horizontally across the surface layer. Once the cracks form a circular pattern, they can cause small areas of the gear teeth surface to spall, resulting in fatigue micropitting.