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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

Waidmannsheil
.400 member

Reged: 19/04/13
Posts: 2390
Loc: Melbourne Australia

Re: Monoblock/barrel thread size
30/09/14 07:00 AM

Fine threads can be torqued to a greater amount than course threads when good material is used. They also have a greater ability to stay tight when subject to vibration or shock loads. The automotive industry uses mostly fine threads for these reasons. In soft materials however, fine threads will pull out and therefore a course thread must be used. Older bolt action rifles such as a Mauser use course threads as they are case hardened all over. If you case harden a fine thread, the thread will be all case and no tough core and will tear out. A course thread will have a hard skin but still have a tough core. Modern bolt action rifle designs such as the Browning A-Bolt (Howa) have a fine thread as they are not case hardened but locally heat treated where required.

Waidmannsheil.

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Post Extras

Entire topic
Subject	Posted by	Posted on
Monoblock/barrel thread size	Crusader68	29/09/14 08:43 PM
Re: Monoblock/barrel thread size	aromakr	30/09/14 12:02 AM
Re: Monoblock/barrel thread size	Dumprat	30/09/14 03:12 AM
Re: Monoblock/barrel thread size	Waidmannsheil	30/09/14 07:00 AM
Re: Monoblock/barrel thread size	Shotgunlover	30/09/14 07:43 PM
Re: Monoblock/barrel thread size	Dumprat	30/09/14 11:28 PM
Re: Monoblock/barrel thread size	Crusader68	01/10/14 02:35 AM
Re: Monoblock/barrel thread size	Waidmannsheil	01/10/14 06:52 AM
Re: Monoblock/barrel thread size	Shotgunlover	03/10/14 06:02 AM
Re: Monoblock/barrel thread size	dpcd67	03/11/14 05:54 AM
Re: Monoblock/barrel thread size	Crusader68	17/11/14 11:57 AM
Re: Monoblock/barrel thread size	Ron_Vella	20/11/14 12:25 PM
Re: Monoblock/barrel thread size	Shotgunlover	21/11/14 10:04 PM
Re: Monoblock/barrel thread size	Ron_Vella	22/11/14 03:42 AM

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