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Originally Posted by billbo911
I am wondering if anyone has already determined the specifications for the Lead Gear in the Left or Right Denso Window motors. Specifically, I am looking for: pitch, angle and possibly the number of teeth.
"Why" you might ask?
If my insanity hasn't taken over, I am hoping to have the lead gear drive an encoder pot through a small hole or slot in the side of the frame of the gear assembly.
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I can't answer your question directly, but I think that even your modification to allow a gear to mate with this worm or wormgear would illegal. I don't have chapter and verse in my hand, but I am pretty sure this would be an illegal modification to a motor. Motors are pretty tricky. Only things that are explicitly allowed are legal. I don't think this type of modification is specifically allowed.
As to your question. The worm and worm gear are designed to mate together and are not likely to be a easily matched by an "off the shelf" type standard pitch gear. The reason is complex but basically, they have to trade off a lot of things in a worm/wormgear design (tooth thicknesses, helix angle, center distance, etc.) Since the parts are no longer cut from standard hobs, there is no reason to stick to a standard pitch (even in the plane of the cutter -- the so called normal plane), standard pitches are almost always a last priority.
Joe J.