Mauser rifle threads II
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nononsense;
As the pictures will show, it's a FN receiver, the barrels have good and bad threads, of 12 TPI. The real mystery is I can't see, type or proofread and my keeper was gone.[B)] Being as these are the best four of 16, I have issues with cameras too. I hope to get to the gunshop this week. Thank you for your patience in my education. It is supposed to be large ring to large ring; FN receiver is approx. 1 and 1/64" inside diameter using calipers. Good threaded barrel threads measure approx. 1 and 7/64" O.D. with same calipers.
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nononsense;
As the pictures will show, it's a FN receiver, the barrels have good and bad threads, of 12 TPI. The real mystery is I can't see, type or proofread and my keeper was gone.[B)] Being as these are the best four of 16, I have issues with cameras too. I hope to get to the gunshop this week. Thank you for your patience in my education. It is supposed to be large ring to large ring; FN receiver is approx. 1 and 1/64" inside diameter using calipers. Good threaded barrel threads measure approx. 1 and 7/64" O.D. with same calipers.
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Per your last thread.
quote:Originally posted by slideways Prussian blue shows full face contact and the barrel threads bottom in the receiver after the first thread. Original barrel's filed threads are .027" smaller (o.d.) than the Czech's good one's. Probably more interference than bright sun and cold water will fix. I can imagine some variation given numbers and manufacturer's over the years. Besides if it's that tight headspace, which will probably have to be adjusted, will be a real pia. I think making the threads smaller will probably lose to another barrel that fits better. Are Mauser's metric or SAE or both in threads? My Craftsman thread pitch gauge says 11 tpi on all. Yes indeed, the barrel is 14 tpi. on the Siamese Mauser, whose barrel threads in like I think it should. I assume timing the barrel refers to the extractor slot in it like the Siamese has? is that correct? The only reason I called it an FNC was because that's what is stamped in the receiver; thank you for the differentiation.
Thank you
I'm probably assuming something here but weren't those era FN's small ring and the same Czech VZ-24's large ring? Just guessing but I'm thinking you couldn't get a full turn from a large ring barrel into a small ring receiver.
Edit:
To me it looks like they are different sized. But also, that one may be closer to the camera than the other. The one on top appears to have interrupted threads. Is that correct? Possibly a takedown customized barrel from years ago?0 -
Mausers were made in two basic sizes:
Large Ring = 1.100" tenon diameter/ 12 TPI
Small Ring = 0.980" tenon diameter/12 TPI.
While the angle of your photograph may be a little misleading, it appears that you have one of each diameter. The one with the interrupted threads is wild card to say the least. I'd need to see more this to determine what it's all about. Mauser have been used for switch barrel rifles for decades and the interrupted threads is one method of accomplishing this.
The FN action is a Large Ring as noted by the step down from the front ring to the rails. Great action, build a great rifle with it and whatever you do, don't cobble on it.
Best.0
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