I am having a tough time getting props tight on the front mount BadAss 5mm shaft. I am using a typical collar clap-on prop mount. Has anyone found a method to prevent slippage when tightening down?

I was thinking that maybe taking a cutoff wheel and roughening up the shaft might do it but would like to hear what others have done.

Best,     DennisT

I have had the same problem.  What I am doing now is pre tightening the prop nut so that I have to use moderate force to get the collet onto the shaft.  It seems to hold just enough for me to get the prop nut to grab.  It was so bad when I was using Cobra motors that I put a hole in the bottom of the cowl so that I could slip an 1/8" wood dowel into it and hold the can just enough to get it started.  My biggest issue though was the spinner.  I use plastic because, well I am cheap, and the backplate and prop alignment was always off.  On a profile, I just hold the can.

Ken

I think we are talking about 2 different issues. One is the collet slipping on the shaft, the other is the prop slipping on the collet. I had the first issue with a Badass motor on a 5mm shaft. One of my flying buddies, Ken Cook, told me to spray the shaft with some accelerator or wipe it with alcohol. I thought that was a little crazy but he has never steered me wrong. I tried it and it work instantly, the collet grabbed on to the shaft with no slippage.

What I finally found that works on my BadAss 2320 motor is to slip a very thin (wheel collar size) allen wrench through the back of the motor (away from the windings) to hold the motor can from turning, then tighten the prop nut. This has worked completely and did not damage to the motor.

Best,    DennisT