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"Folded"

This is a discussion on "Folded" within the SIG Sauer Gunsmithing forums, part of the SIG Sauer Forum category; I like stamped. Whatever you call it, the point is... the older slides were made from sheet metal, not bar stock....


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Old 09-15-2020, 08:10 PM   #16
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I like stamped. Whatever you call it, the point is... the older slides were made from sheet metal, not bar stock.
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Old 09-15-2020, 08:26 PM   #17
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I would say they are "pressed" as a hydraulic press is surely used.
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Old 09-15-2020, 09:09 PM   #18
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Originally Posted by bblr View Post
I would say they are "pressed" as a hydraulic press is surely used.
In the other thread somewhere there is a pic of one of the presses.
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Old 09-15-2020, 09:23 PM   #19
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Simple really... one is stamped/pressed/folded, tomato tomotto. One is milled from a forged billet. Folded came from somewhere, If thats what Sig calls it then it works for me as all are 3 are correct. We had a press that would punch 1 inch diameter holes thru 1 inch plate. The task I see in the other thread isnt even that complicated from a machine point of view. Some rules are universal no matter if your building a firearm or a locomotive.
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Old 09-16-2020, 01:24 AM   #20
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Originally Posted by ThnkFrst View Post
I think that the triangular flat on the top of the slide is formed when the slide is "folded" (in my experiences it's a stamping). If you look closely at this pic taken after the chin and rear radii are welded but before machining ops, you can make out the flattened area.



I think you are right that it gives the barrel hood something flat to run on.
I was referring to the milling on the inside of the slide, not the flat triangle on the top. If you look inside the slide, you can see the milling swirls just ahead of the breach opening. Even if the barrel hood would lock into place, when it unlocked and tilted under the lip of the breach opening, it would encounter those curved corners, if not milled flat and square.
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Old 09-16-2020, 02:47 AM   #21
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The top is from a P245. The bottom is a P228. You can see where they milled the flat spot for the barrel hood to slide on. On the P245, they used the same head to grind the weld down. Apparently the weld was encroaching into the round barrel space. This may have been necessary on 45acp, because of the wider barrel, and not on the P228. This hole that exists on the P245, where the weld was removed, is much deeper than it needs to be. Makes you wonder why that depth wasn’t controlled. If you look closely, you can see what is left of the interior triangle, which corresponds with the triangle on the top of the slide.
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Old 09-16-2020, 02:47 AM   #22
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buy good guns. pressed, rolled, forged, folded, inverted - if you know the quality is there then get it.

if we are too choosy we'll soon be boycotting brands because they import their steel, import their wood for grips, and so on.
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Old 09-16-2020, 02:57 AM   #23
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Originally Posted by Heavy Industries View Post
Simple really... one is stamped/pressed/folded, tomato tomotto. One is milled from a forged billet. Folded came from somewhere, If thats what Sig calls it then it works for me as all are 3 are correct. We had a press that would punch 1 inch diameter holes thru 1 inch plate. The task I see in the other thread isnt even that complicated from a machine point of view. Some rules are universal no matter if your building a firearm or a locomotive.
These stairs are in my home. We punched holes in 1/2” steel, painted them and then ground the swirls on the top. Heavy rascals to install
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Old 09-16-2020, 04:32 PM   #24
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These stairs are in my home. We punched holes in 1/2” steel, painted them and then ground the swirls on the top. Heavy rascals to install

Those stairs are slippery SOB's w/ a drop of water on them...aren't they!!

My point/start of this thread-
Words have meanings that are NOT always translated from one language to another.

Websters definition of "Folded" differs from the Swiss/DE definition.
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Old 09-17-2020, 02:42 AM   #25
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Those stairs are slippery SOB's w/ a drop of water on them...aren't they!!

My point/start of this thread-
Words have meanings that are NOT always translated from one language to another.

Websters definition of "Folded" differs from the Swiss/DE definition.
I’ve not let them get wet. The oak treads above the landing, are slick in sock feet.
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Old 09-17-2020, 03:14 PM   #26
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I bought my 1992 German made 228 that the slide was formed, welded, then machined and it has preformed flawlessly ever since. I read somewhere that when manufacturing was moved to the US they started machining slides. I remember that the MG 42, with it's formed receiver held up pretty well firing 8X57 rounds at a rather good rate. Of all the things one has to worry about a formed Sig failing is not high on my list.
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Old 09-17-2020, 03:54 PM   #27
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Originally Posted by roland View Post
I read somewhere that when manufacturing was moved to the US they started machining slides.
SIG USA never manufactured folded slides. They have produced milled stainless slides from the very start.
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Old 09-17-2020, 08:01 PM   #28
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Originally Posted by roland View Post
Of all the things one has to worry about a formed Sig failing is not high on my list.

No worries in the least.
My "FORMED" slide SIG P220's,226's,228's have functioned flawlessly also.

Just stating a translation error.....fact.
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