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Author Topic: Under rib attachment  (Read 3695 times)

Offline b bogart

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Under rib attachment
« on: October 24, 2008, 09:44:08 PM »
How many screws are necessary to hold a rib on? 3 sound right?? How deep do the holes have to be? 3 threads gives max holding power right?
Full stocks are less confusing.  ???
Thanks in advance!
Bruce
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Offline David Rase

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Re: Under rib attachment
« Reply #1 on: October 24, 2008, 10:14:25 PM »
Bruce,  Max holding power on a thread is on diameter.  If you have a 1/4" diameter bolt once 1/4" length of the threads have been engaged you have met max thread strength.  I would think you would want 4 screws to hold a rib down.
DMR
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Offline Paddlefoot

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Re: Under rib attachment
« Reply #2 on: October 25, 2008, 07:25:58 AM »
Would anyone say it was a bad idea to just solder it?
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R. Hare

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Re: Under rib attachment
« Reply #3 on: October 25, 2008, 09:36:03 AM »
Paddlefoot,

Only originals I've seen were soldered, so that'd be my way to go.
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Offline b bogart

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Re: Under rib attachment
« Reply #4 on: October 25, 2008, 04:10:41 PM »
It's going to be a copy of a Vincent and they were screwed (underrib that is). Thanks dave.
Bruce
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HistoricalArmsMaker

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Re: Under rib attachment
« Reply #5 on: October 25, 2008, 05:09:14 PM »
Bruce
They were also "staked" meaning instead of the screws they had a nice soft piece of iron or brass staked into the barrel then peened into countersunk holes in the rib.
Susie
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Offline Paddlefoot

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Re: Under rib attachment
« Reply #6 on: October 25, 2008, 07:29:07 PM »
These old timers knew all the ways to "skin a cat"
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The nation that makes great distinction between it's warriors and it's scholars will have it's thinking done by cowards and it's fighting done by fools. King Leonidas of Sparta

max

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Re: Under rib attachment
« Reply #7 on: October 25, 2008, 11:56:53 PM »
I'm also building a Vincent and wasn't sure how to attach the rib. Decided to screw it on as the heat might cause the match barrel that I'm using to bend  slightly from uneven heating and then be "frozen" in that position when the solder cools. Since it's a .40 cal 7/8" barrel there's lots of "meat" for the screws.
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