Fisher Price Motor Into Drill Gearbox

[sanddrag]

Originally Posted by JVN

This is what I'm most interested in.

I do not have the motors in front of me. Are the actual output shafts the same size? Did you just pop the Mod7 off the drill, and throw it on the FP, or did you use a different gear? Is there any voodoo involved?

John

I was recently interested in this myself. The drill pinion bore measures ~5.0mm and the FP ~.124" (from firstcadlibrary inventor files). So, you can bore out the FP gear to put on the drill but you'd have to do something really special to put the drill gear on the FP. Maybe weld it up and bore it out or press in a solid piece (tight), bore it out, then press it on the motor. I have never pressed a gear on a motor so I don't know that much about it. I do know the Tecknokats have done this a bit so you might ask Andy Baker.