key on axle ?

[pearl111]

Hello I am getting ready to put my sprocket/hub wheel/tire assembly onto a 1 inch axle with 1/4x1/4 inch key. At this time I don't have any lock collars. Can I run the key in each assembly or should I run the key the whole length of the axle. Each wheel and sprocket hub have their own set screws. I realize I will need lock tight on set screws. Can I get buy without lock collars. This setup is on a self made 3/4 inch square tubing mini bike (nothing fancy) frame. With a predator 212 motor -governor removed air intake / muffler upgrades. thanks mike

 

[ezcome-ezgo]

You don't need key stock where there is no hub/wheel/etc. Lock collars prevent side-to-side or lateral movement of the components. If you take it easy it would probably be ok, but who takes it easy? I suggest you go ahead and invest in the (2 piece) lock collars for future peace of mind.

 

[mckutzy]

You could also use pipe clamps on both sides with a longer key, to clamp the key of the hub to prevent movement.

 

[bob58o]

I just almost lost a wheel because I think I forget the key in its hub.
The Wheel hub moved over 2 inches and probably would have come off.

I will be investing in lock collars for my axle.

 

[mckutzy]

I had thrown a key for my main tire hub..... Partly welded the shaft to the hub... and thats how I stopped that day before I found the key on the floor....

 

[ezcome-ezgo]

The way I think: the purpose of the key is to enable the axle to transfer it's angular momentum to the wheel/hub/etc., it also happens to play a role in securing the assembly to the axle. However, if the only hardware devise in use to prevent horizontal motion on the axle is a small set screw, this is a weak point that locking collars can overcome.

 

[chancer]

Get the Lock collars. They are cheap. but get the higher priced Split type collars. Well worth the investment to avoid the hassle.

 

[OzFab]

Wait, this is for a mini bike? So, there's a flange or pillow block bearing on each end, correct?If so, the axle won't be too long & is locked at each end so, spacers should do the trick...