Motor Shaft: Grind Yes or No?

Originally Posted by redshift

I left a few things out of my first post.

I am running a 9XL with an RCM pinion, setscrew out. To get full mesh the setscrew is out as far as I can go. In other words I can't grind it, the setscrew will be on the edge of forcing the pinion off, so in my case I'm hoping there is enough bite without grinding it, only using Loctite....

My S600 motors on my Emaxx are in same situation, caused by motor shaft being shorter than the Titans they are replacing. I was concerned like you that pinion would come off after running a while. I am barely on the edge of the shaft and use a flat spot and blue loctite. About 2 dozen runs later, nothing has come off and I've stopped worrying about it.

I use motor spray to clean both set screw and the set screw hole before applying blue loctite. Any trace of oil on either - loctite will either not set at all or only develop part of its full strength. Also have to give it some time to set.

[lincpimp]

I always grind the shaft, and never use loctite. I have never had a pinion come off...so far!

[DRIFT_BUGGY]

Originally Posted by lincpimp

I always grind the shaft, and never use loctite. I have never had a pinion come off...so far!

I have only had one come off which is when there was no flat shaft. If you got a dremel it takes all of 3 minutes to do.

Originally Posted by lincpimp

I always grind the shaft, and never use loctite. I have never had a pinion come off...so far!

I locktite "everything", my wife thinks I have stock in loctite.....

[Peter Zicha]

Here is a homemade jig for making factory quality flatspots

Originally Posted by Peter Zicha

Here is a homemade jig for making factory quality flatspots

thats a nice idea...are the square pice of metal you have wielded to each piece of angle iron used to keep the shaft straight?

[Peter Zicha]

Originally Posted by azjc

thats a nice idea...are the square pice of metal you have wielded to each piece of angle iron used to keep the shaft straight?

No , If you look carefully they are on the bottom of the jig , they are exactly 5mm thick same as the shaft . when in the vise they keep a consistant distance on the jig clamping the shaft . without those it would be impossible to hold the shaft

[DRIFT_BUGGY]

Originally Posted by Peter Zicha

Here is a homemade jig for making factory quality flatspots

Well done, that is a great idea