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1911 construction methods

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Post by Froneck Sun Dec 18, 2022 4:32 pm

Some time e ago I found or was given the link to a sight that had numerous drawings/pictures of the tooling used to make the 1911 back in the later 1920s or 30s. It was quite interesting. I probably saved the site on an old computer. I would like to find that site again but can't seem to locate it.
 Anyone have any information as to where I can find that information? Been so long ago I can't remember if there were videos of the tooling doing the cutting of rather difficult machining operations but I seem to think there was.

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Post by Axehandle Sun Dec 18, 2022 9:17 pm

The NGMTU book I've shared numerous times has a lot of that stuff in it.

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Post by Froneck Mon Dec 19, 2022 11:05 am

I'll look for that book, Thanks!!  But what I had was available online and if my memory is correct there was video of the items in operation.

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Post by Wobbley Mon Dec 19, 2022 11:51 am

If it was from the 1930s, would it be much use today?  I say this because manufacturing techniques have change so much even in the last 30 years would such a film be even useful.  The hardest things to machine would be the magazine well and the trigger stirrup recess that goes around the magazine.  But those could be EDM machined now or broached if shove came to push….  The rest is easily done with a well tooled CNC and not a very big one at that.
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Post by Froneck Mon Dec 19, 2022 6:01 pm

Having both CNC and conventional mills there are quite a bit on the 1911 that is very difficult. Though I have to admit my CNC is not the latest 5 axis type. Yes EDM is another way but they didn't have EDM back in the 30's. The disconnector slot in the slide was shown and I was amazed on how easily they cut it but now can't remember how they did it

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Post by troystaten Mon Dec 19, 2022 6:19 pm

I think I remember the film Froneck is talking about.  It was one of those "Arsenal of Democracy" films or some such thing.  I thought it was on Youtube but I can't find it.

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Post by Wobbley Mon Dec 19, 2022 6:58 pm

I did find this one from WW2.  In Periscope Film’s YouTube.

https://youtu.be/Q7XUtgIVo7k
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Post by troystaten Mon Dec 19, 2022 7:41 pm

That's the one, thanks Wobbley.

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Post by WesG Tue Dec 20, 2022 2:10 pm

The magwell would be milled and broached. On a CNC, a single point broach to square up the rear corners would be massively less expensive than a traditional broach. Wire EDM would be cheaper ...

Part of the trigger stirrup cut can be done from the top. Again, the back end of it shaved in from the rear. Trigger shoe cut the same, roughed in with an endmill from the top and a keyseat cutter from inside the trigger guard. An endmill from the rear would be a reach.

Disconnector cut in the slide is a .750 diameter cutter with a .187 shank ... yikes. Maybe if it was a really narrow cutter ... with an outboard support?

However, with my limited assortment of precision radius gauges, penny, dime, nickel, quarter, a bare slide I have looks roughly nickel size, .830. A penny (.750) rolls back and forth in it. Optimum, sourced thru KC.

Sure would be interesting to get a tour of JEM ... just up the road ...

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