My project to turn an RC truck into a robot is coming along nicely (http://imgur.com/533aEgH
). There's a major problem though that in retrospect I should have anticipated: the toy drive motor no longer has enough torque to drive the added weight.
My plan is to buy a good gearmotor from servocity or something to replace the old motor: (http://imgur.com/7FcxN51
). I'd prefer to leave the old gearbox intact and just swap out the motor because that's clearly way less work, but the pinion gear appears to be permanently attached to the old motor shaft and I'd need a replacement. So I need the pitch. I've read that pitch is equal to the number of teeth that would be on a one inch gear, but this gear: (http://imgur.com/70ZALxD
), which is just under an inch in diameter, has 34 teeth... it seems to be a nonstandard pitch?
I am an electrical guy and kind of clueless about gears... any advice on what to do in this situation?