[sanddrag]

I believe it is a 20 degree pressure angle but don't hold me to it. You can get Mod 0.7 gears in Acetal from www.sdp-si.com and the only place for metal ones in North America is www.pic-design.com SDP is usually pretty fast with orders, PIC usually takes 4-7 WEEKS for those gears. Good luck! Let me know if you have any more questions.

EDIT: I forgot to add that team 571 used the Acetal ones with no failure, however they did not use them directly on the shaft of the Chiaphua motor like 2003 Tecknokats style. http://www.chiefdelphi.com/forums/pi...gle&picid=6328 If you run the numbers, there is not much PSI on the gear teeth and keyway and the plastic might be able to take it, however, there's a greater piece of mind that comes with steel.