i'm trying to figure out how to make some very small (think small servo-sized) involute spur gears. i have a taig CNC with rotary table and a sherline lathe. ...and i'm not averse to purchasing some equipment.
the smallest / most complex spur gears i'd like to make are 90 diametral pitch (120 DP would be great), and perhaps 90 or more teeth. (pressure angle is not critical to me: 20 or 14 1/2 degree PA seem pretty standard.)
i've tried to find involute gear cutters, but i can't find anything greater than 60 DP.
i'd try to find a service provider to help...but since i'll probably want to go through several iterations to find the right DP and tooth count, it would probably get expensive quickly. (plus, it'd be fun to be able to make these on my equipment at home.) ...or am i crazy to try to do this type of thing at home?
any help would be greatly appreciated...