Securing Machine Keys

[tsaksa]

I have at times cross drilled a shaft starting right in the key-way. A cotter pin then can be used to secure both the gear and the key. But of course this assumes that you have clearance for the cotter pin, and are able to cross drill the shaft, which are sometimes hardened to the point where drilling is extremely difficult. In this case a small diameter carbide tipped concrete drill (one that has never been used even once on concrete) can be effective in drilling some of the hardest materials. But always exercise extreme caution when working with such hard materials.

[Taylor]

If you need an 1/8" key, the VEX axles work great.

[pfreivald]

You can put a small tack from a welder on either side of the key in certain applications (but cover the keyway to avoid spatter).

We have in times past mangled the keyway with a chisel on either side of the key, thus preventing the key from sliding loose. It never failed us, but there are generally better ways to do things.

[Nick Lawrence]

We just use a bit of crazy glue, and glue the key to the gear/wheel/vial of winsauce.

-Nick

[pfreivald]

Originally Posted by Nick Lawrence

We just use a bit of crazy glue, and glue the key to the gear/wheel/vial of winsauce.

-Nick

I don't believe winsauce is COTS!

[Nick Lawrence]

Originally Posted by pfreivald

I don't believe winsauce is COTS!

It's a custom component.

-Nick