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howa re-thread

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.
 
Not sure how to post links, but on 3/31 someone posted in this section about a PTG reamer made to convert Howa actions to standard threads.
 
Thanks guys, some how I didn't find that when I was searching. Looks like it will work without a problem. I think I am going to put a mullerworks barrel on it and chamber it in 222.

P.S. nice work by the way kendog.
 
To mod the receiver, simply chase out the metric threads with a 1"-16 tpi tap. To all the lathe spider 50 millionths purists out there, lay off.
It worked fine. ;)

The M14 mag conversion was done by my good friend,Frank, and we found out what everyone else discovers when this is done. The double stack mag with the stock spring is WAY to strong for a bolt rifle. Have to cut the spring and use a full length mag body to get 5 rounds to feed easily. The M14 has a MUCH stronger cycling system and can overcome the powerful mag spring.
Much better to go with the newfangled bottom metal and AICS single stack magazines.

Legacy sports has bottom metal plastic and mags that fit in the Howa cutout for around a hundred bucks.
 
Instructor at comm college machine shop course, demonstrating tapping.
"it should'nt be this hard to turn....keep it straight.... SNAP.

lol.
 
timbertoes said:
Instructor at comm college machine shop course, demonstrating tapping.
"it should'nt be this hard to turn....keep it straight.... SNAP.

lol.

If you can break a HSS 1 inch tap by hand without a cheater, you're tough!

Actually, 2/3rds of the thread is supporting the tap when it starts to cut. And you have to take it easy.
Put some high sulpher juice on it and run it in. It ain't rocket surgery.
 
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
 
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.
 
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.
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.
 
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
 
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

I knew sooner or later someone would throw a turd in the well.
 

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