Sometimes I upload things that I find personally useful but expect nobody else to use. This is one of those things.

I wanted a fitting to make it easier to load grease into the 22 spline birfield joint of the front axle of my Suzuki Samurai, so I designed this.

Maybe you have the same problem, or maybe you are just interested in how to do axle splines in CAD. I did this in Autodesk Inventor, and the source file is included.