The word "dished" when applied to screw holes?

[SouthNarc]

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!

 

[Llance]

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.

 

[sbrmike]

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.

 

[s&wchad]

Here are some photos of "dished" sideplate holes.

 

[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.

 

[RM Vivas]

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.

That90 degree comment is probably the best description and should be used as the standard.

Best,
RM Vivas

 

[SouthNarc]

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.

So "dished' and "beveled" are essentially the same thing?

That's actually super helpful thank you.

 

[SouthNarc]

Do these screw holes and the side plate look dished?

 

[dfariswheel]

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................

 

[s&wchad]

Do these screw holes and the side plate look dished?

Yes, all three are dished...

 

[Peak53]

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!!

 

[SouthNarc]

Yes, all three are dished...

Thanks that's helpful. At least now I know what I'm looking at when I think of that word.