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I have a pinion spur gear that I need to mate a new gear with. It is an 8/10 Fellows Stub tooth with 9 teeth on a 10 tooth blank. Pitch diameter the # teeth divided by the diametral pitch. I know for Fellows Stub Tooth gears the numerator of the 8/10 diametral pitch is the one to use to...

I'm finishing a worm gearbox design and am wondering about the face width and effective face width of the worm gear. In my Handbook of Practical Gear Design it says "not to exceed 2/3 of the worm pitch diameter for effective face width (Fe)". Why is this? Can I not use the full face...

I'm designing a worm gearbox and have questions regarding some design issues. The machinery handbook has equations for whole tooth depth W=a+b (addendum plus dedendum of the worm) and it also equals A+B (addendum and dedendum of the worm gear). Is that to say a=A and b=B, or is it just their...

Thanks, but the loading dictates that I definitely cannot use a plastic gear. This is not a lightly loaded gearcase.

I'm currently designing a 90 degree worm gearbox. Center distance (2.066") and (approximate 10:1) ratio is known. I'd like to use a P/M helical gear with the worm instead of a hobbed bronze or brass worm gear. I cannot find much information with this combination. How do I spec out a helical...