tapping CIM axles?

[JamesCH95]

Originally Posted by Ether

I wonder if this would work:

Put the CIM in the freezer for 10 minutes, drill a hole in the piece you want to connect the CIM shaft to, heat that piece nice and hot, and shrink fit it over the CIM shaft.

It's potentially easier to heat up the part you're installing on the CIM with a torch. Raising the temperature by 300-600 degrees with heat will get a bigger dimensional change than cooling by 100 deg.

When this sort of thing is done IRL (bearing races, for example) one part is usually put in an oven and heated to 300-500F and the other part is put in an alcohol bath with dry ice at -109F.

As for actually retaining something on a CIM shaft, check out the normal pinion retainer rings available from AndyMark and/or VEXPro. They may seem a little flimsy, but do a pretty great job holding on.