What do you guys think about turning a howa action into a standard threaded receiver? Would removing that much material make it to weak and unsafe? The reason I ask is I can only turn standard threads on my lathe.
timbertoes said:Instructor at comm college machine shop course, demonstrating tapping.
"it should'nt be this hard to turn....keep it straight.... SNAP.
lol.
gunsandgunsmithing said:One question...You keep saying 1"-16(tpi). A Remington is 1-1/16"-16tpi. How did you get a Remington barrel to screw in after running a smaller tap in, or is this just an error in stated tap size?
http://forum.accurateshooter.com/index.php?topic=3810853.msg36202302#msg36202302
That makes sense. I was actually thinking that the Howa tenon required a 1-1/16-16 tap to clean it up. Wouldn't really matter if you recut the barrel tenon to fit, though. Thanks.kendog said:gunsandgunsmithing said:One question...You keep saying 1"-16(tpi). A Remington is 1-1/16"-16tpi. How did you get a Remington barrel to screw in after running a smaller tap in, or is this just an error in stated tap size?
http://forum.accurateshooter.com/index.php?topic=3810853.msg36202302#msg36202302
The Rem thread was cut off and barrel tenon re-cut to fit the modified Howa.
gunsandgunsmithing said:One question...You keep saying 1"-16(tpi). A Remington is 1-1/16"-16tpi. How did you get a Remington barrel to screw in after running a smaller tap in, or is this just an error in stated tap size?
http://forum.accurateshooter.com/index.php?topic=3810853.msg36202302#msg36202302
Robert said:gunsandgunsmithing said:One question...You keep saying 1"-16(tpi). A Remington is 1-1/16"-16tpi. How did you get a Remington barrel to screw in after running a smaller tap in, or is this just an error in stated tap size?
http://forum.accurateshooter.com/index.php?topic=3810853.msg36202302#msg36202302
GandG,
Whatever the nominal diameter, running a 16 tpi tap into a M1,50mm threaded bore is a mechanical nonsense:
16 tpi = 1,58mm= .0031inch.
Each thread turn, the difference increase with that amount and that is removed from the thread profile and, at the end, there remain very little of threads profile to maintain the barrel.
And that, even if the threads are cut on the lathe.
Moreover, the thred pitch difference will act such that the tap will engage across at an angle and the tap will follow all the way long and the barrel will never be straight fitted....
The solution of increasing the diameter to cut new full profile threads will result in a severe weakening of the action at this point.
We are used here to cut imperial threads with metric lathes (BTW, standard mean ISO metric countries). A 127 teeth wheel to final drive of the gearbox does the work, and this is a good exercise that we find as easy as cutting an ISO metric threads...just taking a little more time..
I think the best recommendation is to that, if one cannot or does not feel fit to cut metric thread is to find someone who can do instead as deliberately ruin an otherwise good action.
R.G.C