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Posted: 6/11/2011 4:55:35 AM EDT
| I am getting ready to thread my .920 dia 10/22 bull barrel for a suppressor, I will be doing this on a Haas toolroom lathe. I need a 1/2-28 thread .400 long, my question is since the crown on the end is concave should i face the end of the barrel first? Or can i just turn it down thread it and go? Threading is not new to me I do it almost daily just never done a gun barrel before. Anything else I need to know before I do this? |
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Quoted:
I am getting ready to thread my .920 dia 10/22 bull barrel for a suppressor, I will be doing this on a Haas toolroom lathe. I need a 1/2-28 thread .400 long, my question is since the crown on the end is concave should i face the end of the barrel first? Or can i just turn it down thread it and go? Threading is not new to me I do it almost daily just never done a gun barrel before. Anything else I need to know before I do this? Facing the muzzle is probably not necessary unless there is a reason the live center won't fit. You should re-crown the barrel after it is threaded to remove any damage caused by the live center. |
| don't put a live center or anything else in your bore except a range rod to indicate from......you indicate the barrel in from the bore, not the outside diameter. you really need a spider/cathead at the front/headstock and back of your lathe to do the threading properly. i don't have pictures of the last set we built, but check over on snipers hide in the gunsmithing section,there's lots of info/pictures there |
Well I did it today, the turning went good then I found I didnt have an insert that would do that fine of a thread So one of my co-workers and I set it up in a mill and thread milled it. I dont do much with the mills, turning is more my area of expertise. It looks good and I should know in a few weeks how it works. Thanks for the help and suggestions.
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Quoted:
While you're making stuff, make a dummy suppressor to find out if your threading job is good enough to avoid baffle strikes. In my suppressor making experience boring/thread the suppressor is much harder to get straight than the OD thread on barrel. I center a barrel in a cathead held in the chuck, a suppressor (I have only made monolithic) is done in a 4jaw and steady. I want the OD threads concentric to the last inch of the rifling, but the average of the suppressor ID concentric to the rifling as the bullet is going in a straight line as soon as it leaves the barrel. |
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