Posted by Sargent Caldwell on April 12, 2007 at 13:05:25:
In Reply to: Increaing RPM (Gearing or any other way) posted by Josh on March 20, 2007 at 23:29:34:
I made a replacement gear for a customer's blacksmith blower. The fan was on the worm, the crank was attached to the worm gear. It had failed from lack of lubrication. The worm was about 3/4" PD and was about 5 start with a large lead angle, 45° or more. The gear was about 5 or 6" dia. The arrangement seemed to work well. I could not find my notes on this.
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