Shop made Rotary broach holder and broaches.

[randyc]

I love the simplicity of your design. I wish I would have seen it before I made mine.

Many thanks.

You know, I'd thought about these broaches for several years and likely would have built something similar to yours. But I wanted to adapt an old Jacobs 18N chuck and make it a live tailstock chuck. I used a long oilite bearing for alignment and a 1/2 inch hard ball for thrust. I was quite satisfied with the way that it worked. Thinking about it later that night a tiny little light went on upstairs, LOL.

Next day I made the sketch and that evening made the broach. I colored the parts on my gas range and dunked them in oil, as usual

 

[magu]

Wow Marcel, thanks for sharing! I never new such a tool existed before tonight. Onto the "someday" list it goes. Your progress looks great so far, I look forward to watching the rest of the build.