Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Class of Threads?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Canadian Bushman" data-source="post: 933096" data-attributes="member: 41122"><p>Tricky pretty much nailed it. </p><p></p><p>A class of thread basically is just a spec for tolerances, 1 being the loosest ascending to tighter tolerances. IMHO even a class 3 thread allows for more slop than i would prefer for a gun barrel. </p><p></p><p>Re-iterating what tricky said, class of thread has no bearing if you cut your receiver oversize truing the factory threads. This is only remedied by cutting the barrel threads to match the receiver. Which is S.O.P. for most gunsmiths. </p><p></p><p>Ive heard of smithy's cutting threads oversize and lapping them in, but ive never seen any actually do it. I would focus on getting the back wall of the barrel tenon perpendicular to the barrels bore, and the actions lugs and face perpendicular to its bore. The actions face and the barrel tenon's back wall will ultimately determine the direction the slop in the threads is removed when the barrel is torqued. Assuming the faces of the recoil lug are parallel.</p><p></p><p>+1 on machinist handbook. </p><p>More than you ever wanted to know about threads in there.</p></blockquote><p></p>
[QUOTE="Canadian Bushman, post: 933096, member: 41122"] Tricky pretty much nailed it. A class of thread basically is just a spec for tolerances, 1 being the loosest ascending to tighter tolerances. IMHO even a class 3 thread allows for more slop than i would prefer for a gun barrel. Re-iterating what tricky said, class of thread has no bearing if you cut your receiver oversize truing the factory threads. This is only remedied by cutting the barrel threads to match the receiver. Which is S.O.P. for most gunsmiths. Ive heard of smithy's cutting threads oversize and lapping them in, but ive never seen any actually do it. I would focus on getting the back wall of the barrel tenon perpendicular to the barrels bore, and the actions lugs and face perpendicular to its bore. The actions face and the barrel tenon's back wall will ultimately determine the direction the slop in the threads is removed when the barrel is torqued. Assuming the faces of the recoil lug are parallel. +1 on machinist handbook. More than you ever wanted to know about threads in there. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Class of Threads?
Top