Re A Myth is A Myth, Stock Lug, Of "NO USE" for Machining !!
Folks;
Here I go sticking my neck out again.
I have long experience in Machining Technology as:
Machinest Tool Maker, Die Maker, Product Designer, Engineer,
and Supervisor In the worlds largest Research Machine Shop at "NASA Langley Research Center". ( 36 Years )
And I feel that gives me a good basis for this opinion.
Due to the very thin and weak nature of the material at the position of the Shoulder stock lug, it lays to reason that the lug could serve no useful purpose as a supporting device for machining purposes, and further for the same reasons it would have no useful application as a locating fixture for Quality Control Inspection purposes.
Experience tells me that if the frame is held firmly by the lug that one could easily deflect the forward end of the frame by as much as .015" or 1/64" as you may.
And this by simply applying the necessary force with only one finger.
Using the weakest portion of the frame as a solid base for all precision machining operations gives rise to the ability of the designer,(GL), to think clearly, I think NOT!
I rather think that The expensive process of producing hot piercing and Forging dies and as many before have said the ability to use any frame with a stock is the most probable reason for applying the lug to all frames.
This would require only a single forging design for all frames.
IMO,
ViggoG
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