Getting the Pinion to stay on the motor shaft? - RC-Monster Forums

George16 · 10:12 PM

Just grind the set screw flat so it will have a bigger surface area to "grab" into the shaft. I do this on all my set screws and no problems so far.

Thirdgen89GTA · 10:10 PM

Quote:

Originally Posted by George16

Just grind the set screw flat so it will a bigger surface are to "grab" into the shaft. I do this on all my set screws and no problems so far.

I'll try that now before get into doing anything to the shaft. I have plenty of set screws that fit. :)

BTW, the diff looks straight in the 2nd two pics I posted. Can anyone else see any angle?

bruce750i · 01.10.2012, 04:55 AM

The top of the spur appears to be slightly leaning away from the motor mount. Is it me or has your pinion been losing some weight?

brian015 · 08:14 AM

Quote:

Originally Posted by bruce750i

The top of the spur appears to be slightly leaning away from the motor mount.

+1
Your spur does not appear to be exactly vertical - this means your mesh will not be perfectly aligned - and your pinion will be forced toward the end of the motor shaft and eventually come loose.

Thirdgen89GTA · 01.11.2012, 05:46 PM

Quote:

Originally Posted by George16

Just grind the set screw flat so it will have a bigger surface area to "grab" into the shaft. I do this on all my set screws and no problems so far.

Went ahead and did this (easiest/fastest thing to check). Issue is so far fixed and I didn't have to modify anything.

Remains to be seen how long it lasts but I bashed pretty hard on 6S last night and had lots of on/off/brake cycles to stress the driveline and the pinion is currently in the same place it was when I started.