I have a old heavy duty drill that I want to pull the motor out of and replace it with a stepper motor. The problem I have is that the motor shaft has a gear cut into the one end of it to drive the gear reduction head. I want to make a adapter shaft to go on a stepper and then ride in the drills gear reduction heads bushing. The motor shaft gear has 9 teeth and has a OD of 0.380". How can I find the DP and pressure angle of the gear so I can find a prodcution gear that I can modify to fit my stepper. I found a bunch of gears at sdp-si.com but I could not find any 9 tooth gears that had a OD of around .380"
I would appreciate any help in figuring out what this gear is and a possible supplier of them.
Thanks
Scott