Making a Gear Cutter Arbor for a Proxxon Milling Machine

I made this arbor on the Proxxon lathe specifically to fit the Proxxon milling machine. This is a better design than my previous arbor project for maintaining good runout, which is important when cutting gears.

OnShape CAD model:
https://cad.onshape.com/documents/94c...

Materials:
42CrMo4 Hot Rolled Engineering Steel 30mm round bar

Machines:
Proxxon PD 250/e Lathe
Proxxon FF 230 Milling machine

Music:
Divertimento D dur für Violine, Viola und Violoncell, Op. 22 by Joseph Haas, performed by Steve's Bedroom Band
Licensed under Creative Commons Attribution 3.0 Unported license
https://creativecommons.org/licenses/...

Easy Lemon 30 Second by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...)
Source: http://incompetech.com/music/royalty-...
Artist: http://incompetech.com/