Axle moving. How to lock down?

[jasonmorris1809]

Installed a new 30mm axle last week on our cadet kart after it had damage from a loose sprocket hub. Ran 2 sessions fine yesterday but the axle shifted at the start of the heat race and broke the chain. I had the set screws as tight as they would go on the bearings. Any tips on locking an axle down?

 

[mark1]

sounds like your missing a axle key somewhere

 

[Jncyall]

Any collar locks on the axle at the bearing hangars?

 

[jasonmorris1809]

The key's are all there. No collar locks at the bearings.

 

[oldman50]

The key's are all there. No collar locks at the bearings.

You need to have locks the set screws on the bearing won't keep axle from shifting. Put one either inside or outside both bearings.

 

[upman1976]

Yes I have the same problems with our kid kart. Only thing that helped was to toss all the set screws and put lock collars on. Think the smaller axles are harder and the set screws can't bite in.

 

[alvin l nunley]

I used to use a small drill to make a pocket for the set screw to bottom out in. I would then Loctite the set screws. Works good. That was 40 years ago and I remember it like it was yesterday. Amazing.

 

[Kart43]

I am with Al on this we have dimpled the axle to seat the set screws. Set screws will hold the axle on our paved sprint track, we found collars stiffened the axle causing chassis tuning issues.

 

[The Closer]

https://www.youtube.com/watch?v=lOmVL7Fx0oU

 

[mater]

A race car builder here in our town said to drill out the threads in the collars on the bearings and drill the axle and tap it and run short bolt in. Said it would free it up. Dont know but his stuff wins all over.