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#1 |
Senior Member
Join Date: February 26, 2013
Location: on the lam
Posts: 1,736
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Are these holes part of the production process, and
what is their purpose?
I've noticed this on many S&W K frames. In the front lower corner of the cylinder window it looks like a drilled hole was just started, and then stopped. Maybe it's the end of a long hole whiich serves as a reference point of when to stop removing metal...don't know. Does anyone know what the deal is? One is of a 66-2, and the other is a 66 no dash. Last edited by Carmady; May 31, 2020 at 12:42 AM. |
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#2 |
Senior Member
Join Date: May 15, 2012
Location: Texas
Posts: 2,610
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Now i gotta go look at my K frames, never noticed this.
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#3 |
Senior Member
Join Date: February 26, 2013
Location: on the lam
Posts: 1,736
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Here's one on my 10-5 from about 1970.
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#4 |
Senior Member
Join Date: December 10, 2014
Posts: 1,967
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It looks like a point of hardness test to me.
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#5 |
Junior Member
Join Date: January 4, 2017
Posts: 11
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Not a great place to do a hardness test. Hard to get the indenter in there and hard to read. And steel hardness indentors usually make much smaller dents.
Could be a hardness check, but seems like an odd place. The top of the strap would be easier to do and less visible to the user. Sent from my iPhone using Tapatalk |
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#6 | |
Senior Member
Join Date: April 17, 2000
Location: Mesa, Arizona
Posts: 1,458
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Quote:
Dave
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RSVN '69-'71 PCSD Ret |
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#7 |
Senior Member
Join Date: January 22, 2005
Location: Kentucky
Posts: 3,657
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I've got a 66-2, serial number AET xxxx, built in 1984, and it does have the lower hole, or punch mark, but the upper one, may or may not be there as it's obscured by a piece of powder or lead shaving.
The model 60-15, (.357) that I'm wearing as I type has neither hole. A quick check on my model 18-3, serial number: 1K9xxxx, built in 1971 (a .22LR), shows what appears to be a punch mark in the lower location, but again the upper one is obscured if present. HTH's, Rod
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Cherish our flag, honor it, defend it in word and deed, or get the hell out. Our Bill of Rights has been paid for by heros in uniform and shall not be diluted by misguided governmental social experiments. We owe this to our children, anything less is cowardice. USAF FAC, 5th Spl Forces, Vietnam Vet '69-'73. Last edited by rodfac; May 31, 2020 at 08:34 PM. |
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#8 |
Senior Member
Join Date: July 10, 2012
Location: Memphis, Tennessee
Posts: 3,005
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My guess would be a vent hole. This to break the vacuum as the crane is pulled out?
Bob Wright
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#9 |
Member
Join Date: October 2, 2017
Posts: 82
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Nope, not a vent hole, since it's not all the way through. No such thing.
Bubba at work? Nah, it's a machining thing that is common for testing if the hole for the crane is too large or offset by thousands and a through hole will occur with a slight drilling. Part of the tolerances for passing depending on the model and frame size. Shoot away! Last edited by ViperR; June 2, 2020 at 06:26 PM. |
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#10 |
Senior Member
Join Date: October 10, 1998
Location: Ohio USA
Posts: 8,564
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You made me look ----
![]() @ my (bought new last December) S&W M69 - L frame. No holes. Now I'll have to dig through the safe & check out my K-Frames (M19 & M17) (and N frame M29) to see if they have holes. LOL! With all that going on in today's world & I'm going on a hole hunt ![]() |
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#11 |
Senior Member
Join Date: June 10, 2005
Location: SW Florida
Posts: 2,748
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....perhaps a "put your needle oiler tip here" lube point?
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#12 |
Senior Member
Join Date: February 26, 2013
Location: on the lam
Posts: 1,736
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It isn't really a hole. It doesn't go anywhere. Maybe 0.050" deep.
It's like someone started to drill a hole, and stopped. The hole part would have been in the part that was cut out, the cylinder window. Many have it, but not all. Here's a couple more, a 1983 686 and a 686 no dash. |
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