Author Topic: Hammer face to cone distance?  (Read 257 times)

Offline ssb73q

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Hammer face to cone distance?
« on: January 31, 2018, 05:08:47 AM »
Hi, while inspecting my Uberti 1862 Navy, I noticed that the hammer face is 0.010" from the end of the cones. Therefore without a cap there is no hammer to cone contact. I suspect that is a good condition as long as caps fire on hammer fall.

I took some measurements off a Remington #10 cap:

Cap metal thickness = 0.007"
Primer mix thickness = 0.018"
Distance from rear of the cone increase with cap on = 0.025"

This suggests that the hammer face to cone distance of my 1862 is good to go.

Is there a design optimal hammer to cone distance for C&B revolvers?

Regards,
Richard

There’s nothing better in the morning than the smell of bacon and black powder smoke!

Offline Hawg

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Re: Hammer face to cone distance?
« Reply #1 on: January 31, 2018, 05:50:11 AM »
I don't know if there's an "optimum" distance but .010 sounds pretty good.

Offline 45 Dragoon

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Re: Hammer face to cone distance?
« Reply #2 on: February 26, 2018, 04:54:18 AM »
I would think "optimum" would be "closest with no contact".  I'd rather keep the extra .009" for insurance and be happy with .001" worth of "no contact".

  I set them up using marker on the cone until no transfer to a clean hammer face. No transfer, no contact, stop!! - bang every time!!

Mike
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Offline Yolla Bolly Brad

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Re: Hammer face to cone distance?
« Reply #3 on: February 26, 2018, 11:36:13 AM »


Is there a design optimal hammer to cone distance for C&B revolvers?

Regards,
Richard

For inspection purposes, I would think that a range is what you'd be looking for. Maybe something like .001" to 012" gap and you can leave it alone. Some testing by Richard will tell us if .010" is 100% reliable with the combination of caps, cones and mainspring being used.

Offline Hawg

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Re: Hammer face to cone distance?
« Reply #4 on: February 26, 2018, 11:41:49 AM »
As long as I have reliable ignition and the hammer isn't hitting the nipple I'm good to go. I don't need to know exactly what the gap is.

Offline Yolla Bolly Brad

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Re: Hammer face to cone distance?
« Reply #5 on: February 26, 2018, 04:02:28 PM »
Yes, function testing is the bottom line. A specification would just speed things up for a gunsmith.