We were installing the
BaneBots 15T 3.2mm pinion gear on the
AndyMark AM-2194 motor this weekend. We install them by carefully placing the pinion on the end of the motor shaft, placing the unit in a vice, and slowly closing it.
The first pinion we installed works fine. The second one was loose on the shaft. It looks like, rather than deforming around the shaft of the motor, the inside of the hole was peeled away by the motor shaft. I checked the shaft and it's fine dimensionally and otherwise, reading right at .125.
I'm going to order more pinions, but am wondering whether there is something additional we should be doing during the install to prevent this from happening.
During the day on Thursday, I had to change costumes a few times, being "Andy the inspector", to "Andy the green power ranger drive coach", to "Andy the President of AndyMark, meeting with companies". I am sure some people in the guys' bathroom were wondering what I was up to. - Andy Baker [more] 
Threaded Mode