Machining process for early Sig's.

DJNBig

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I was looking at the close detail of a friends early SIG that was manufactured in 1979 and I'm really wondering how they had the ability to turn out such a quality product back in thoes days. I can't imagine SIG had access to CNC machinery back then as it was just being developed and certainly would have been single axis most likely and was extremely expensive. So were these pistols done on a manual mill? How could they have created these masterpeices back in the day with such quality and accuracy?

It must have involved many many many tooling changes and work peice positions. I mean this nearly 30 year old firearm is a thing of beauty, something you would only expect from recent decades.

Maybe i'm way off base on this, clue me in if so.

thx.
 
NC was very common back then, otherwise you use one step machines. Both turn out the same results. CNC/NC are great because one machine will do many processes, but one step machines are actually better for high volume.

http://en.wikipedia.org/wiki/Numerical_control

Fixed manual machine (looks like 2-4 steps):

slpav8.jpg
 
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