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03-26-2024, 10:07 PM
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The word "dished" when applied to screw holes?
I've seen the word "dished" used to describe what I believe is a concavity in a screw hole that may very well indicate some kind of polishing beyond the factory. Am I picturing this correctly or am I completely off base? Does someone have a photo of a screw hole that is very obviously "dished" so I can look at that and see what that term actually means? I want to make sure when I read that word I know what it means and what I'm looking at.
Thanks!
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03-27-2024, 01:33 AM
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I think it's best to view it as a screw hole which has had the sharp edges rounded such that they look like the person was attempting a countersink, only it's not a true countersink.
If you see this on a firearm or really any metal object, it will appear that you can get a fingernail or something very thin, "under the edge" of the screw head. Very unprofessional work.
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03-27-2024, 04:03 AM
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It is caused by incompetence either trying to countersink or the more common culprit of using a too wide of a screw driver and ruining the original, proper size hole.
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03-27-2024, 05:24 AM
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03-27-2024, 08:04 AM
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I think of it as the edge of a hole that should be at a sharp 90 degree angle, with that sharp angle polished away, as the photos show.
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03-27-2024, 09:32 AM
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Quote:
Originally Posted by murphydog
I think of it as the edge of a hole that should be at a sharp 90 degree angle, with that sharp angle polished away, as the photos show.
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That90 degree comment is probably the best description and should be used as the standard.
Best,
RM Vivas
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03-27-2024, 09:45 AM
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Quote:
Originally Posted by murphydog
I think of it as the edge of a hole that should be at a sharp 90 degree angle, with that sharp angle polished away, as the photos show.
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So "dished' and "beveled" are essentially the same thing?
That's actually super helpful thank you.
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03-27-2024, 05:41 PM
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Do these screw holes and the side plate look dished?
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03-27-2024, 07:14 PM
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Dishing of holes is typically caused by using improper polishing equipment, often during a refinish.
Too many refinishers used small diameter, soft polishing buffs and those catch on the hole and round it out.
Due to the small diameter it's near impossible to keep a surface flat.
Correct polishing equipment are large diameter hard wheels with abrasive strips around them.
The larger and harder a polishing tool is, the easier it is to keep surfaces flat.
The best polisher in America was Colt firearms.
In the pre-war days they used huge wooden wheels with walrus hide around them.
After the war they changed to large aluminum wheels with abrasives................
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03-27-2024, 07:15 PM
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Quote:
Originally Posted by SouthNarc
Do these screw holes and the side plate look dished?
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Yes, all three are dished...
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03-27-2024, 07:27 PM
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Doesn't one accomplish said dishing by polishing without the screws inserted? Inquiring minds want to know. As to post #9 caption - seventy barrels a day output? That's like 8-9 barrels per hour!!
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03-27-2024, 07:28 PM
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Quote:
Originally Posted by s&wchad
Yes, all three are dished...
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Thanks that's helpful. At least now I know what I'm looking at when I think of that word.
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