Deez Nuts wrote:

John Doe wrote:

What is it called? Part beveled rod? Part double beveled rod?

https://farm1.staticflickr.com/604/2...6d1618cf_b.jpg

It's the inner part of a cordless drill spindle, the part that slides
into the gearbox. The shiny area is ordinary round rod. The dark area
is beveled on both sides.

Details...

9.0 mm, diameter of the shiny round rod part.
6.8 mm, from one beveled side to the other. It's beveled 1 mm on each side.

I might use it, but there's not much to work with.

Not sure you will find the exact thing you want. Perhaps he

http://www.sdp-si.com

Yep, that's the ideas. I can get some keywords from the couplings pages.