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Cas City Forum Hall & CAS-L  |  CAS TOPICS  |  Gunsmithing  |  Topic: Why? 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Why?  (Read 400 times)
willy
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« on: October 23, 2017, 01:26:17 pm »


Was wondering why Uberti would put a hole on the rear of the hammer on the Cattleman revolvers without the safety??
Is there a reason for it?
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Coal Creek Griff
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« Reply #1 on: October 23, 2017, 01:41:18 pm »

Do you mean this hole?  (This is a photo of an 1880's Colt Frontier.)


* Colt Frontier.jpg (125.61 KB, 1024x791 - viewed 32 times.)
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willy
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« Reply #2 on: October 23, 2017, 01:50:24 pm »

YEP, I didn't know colt had the same hole
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Coal Creek Griff
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« Reply #3 on: October 23, 2017, 02:37:27 pm »

It's related to the mounting of the firing pin.  No doubt an expert here can give more details.

CC Griff
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« Reply #4 on: October 23, 2017, 09:43:09 pm »

According to Kuhnhausen on Page 239 of The Colt Single Action Revolvers, the hole was used for selecting hammers with respect to correct firing pin alignment to firing pin port (frame).  A rod was inserted through the .10" hole and a hammer was tested in a frame.  In this way, the stacking of dimensional errors for hammer manufacture and, separately, frame manufacture could be aligned so a selected hammer would work with a given frame.  In other words, to make sure a hammer will work before fitting it to a gun.

Secondarily, the alignment port could be used with the old style (first and second generation) fixed firing pin guns for driving a broken pin out of the hammer for replacement.
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Sagebrush Burns
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« Reply #5 on: October 23, 2017, 11:12:36 pm »

According to Kuhnhausen on Page 239 of The Colt Single Action Revolvers, the hole was used for selecting hammers with respect to correct firing pin alignment to firing pin port (frame).  A rod was inserted through the .01" hole and a hammer was tested in a frame.  In this way, the stacking of dimensional errors for hammer manufacture and, separately, frame manufacture could be aligned so a selected hammer would work with a given frame.  In other words, to make sure a hammer will work before fitting it to a gun.

Secondarily, the alignment port could be used with the old style (first and second generation) fixed firing pin guns for driving a broken pin out of the hammer for replacement.

Very interesting piece of information - thank you.
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willy
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« Reply #6 on: October 24, 2017, 05:34:16 am »

WOW!..Thanks for the info,,
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