What pitch are the threads on a carcano barrel


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ActionYobbo
June 9, 2009, 10:36 PM
whats the thread pitch and is there a die for it

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rcmodel
June 10, 2009, 11:49 AM
1.065" x 14 TPS
.805" long shank, with a 1.135" shoulder.

No, there are no threading dies available.

Rifle barrels are threaded with a lathe in order to keep the threads perfectly square with the receiver & bore.

rc

ActionYobbo
June 10, 2009, 07:50 PM
I thought it would be metric

rcmodel
June 11, 2009, 12:25 PM
It may in fact be metric.
But the information I have is how to cut the threads on an American lathe, with American measuring tools, which doesn't generally cut or measure metric.

The measurements I gave should be close enough to work anyway.

But as always, to be sure, you should take the old barrel out and measure it. That is the best way to insure a good fit on a new barrel anyway.

rc

Jim Watson
June 11, 2009, 12:54 PM
Freank DeHaas says "approximately" 14 tpi.
Maybe metric, but what system of weights and measures was Italy on in 1891?

rcmodel
June 11, 2009, 01:21 PM
IMTP?

Itsa My Thread Pitch.

BTW: I'm also kind of curious as to why the OP wants to re-barrel one?
They are severely limited to what calibers you could change one too due to the necessary charging clip, cartridge head size, and limited pressure the action is capable of holding.

rc

ActionYobbo
June 11, 2009, 10:11 PM
the reasons to rebarrel it are 1) it has no barrel now. 2) I have a barrels sitting around. 3) I need another project. 4)I have nothing better to do. 5) the best of all I need the practice in changing the gears on my lathe.

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