Thread indexing on Luger Barrels Question

[Vlim]

In post war production, Mauser used a specialized threading machine or 'Gewindeschneidmaschine' as they called it on paper.

It was one of the later steps, after shaping the barrel and sight base. After threading, the ejector slot was cut, followed by milling the feeding ramp and cutting out the dovetail area of the front sight base.

[sheepherder]

Originally Posted by Vlim

In post war production, Mauser used a specialized threading machine or 'Gewindeschneidmaschine' as they called it on paper...

I would guess it used a rotary cutter to mill the threads...I'm looking at two Luger barrels and the cutter marks (and end of cut) are distinctive...

Also a 60º (or whatever angle the Germans used - 55º?) thread cutter, this one is for a vertical mill...I would further guess that the Gewindeschneidmaschine used a horizontal cutter, probably on an arbor, with a much larger diameter & number of teeth...