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| RussellT:
Hi Chuck You could screw cut a worm on the lathe, the coarser the thread the better, an acme style thread is what you need. If you do it in steel and make it much longer than you need you can then use part of it to hob a matching gear in aluminium. Cut a couple of slots in the thread you've cut to make it resemble a tap and put it back in the lathe. Mount your gear blank on the cross slide so it's free to rotate and advance it to your rotating tap. You'll need to make the gear blank about the right size for 43 teeth. A steel "tap" should manage a single gear wheel in aluminium without hardening - if you make the tap long there'll be some extra cutting edges. Russell |
| unc1esteve:
Good book with instructions for cutting worm. http://www.bookdepository.com/Gears-Gear-Cutting-Ivan-R-Law/9780852429112 |
| 75Plus:
Chuck, the incline motors are 120 Volt AC and run at a constant speed. They are actually a power driven nut which runs the screw up and down. In your application the screw would become the output shaft. For speed controls, the KB Electronics KIBC 125 is an excellent control for treadmill motors and can be found at reasonable prices on the Ebay. With a heat sink they will handle up to 16 amps which is close to 2 HP. Joe |
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