Can a Left Hand Thread be Changed?

ridgearms

ridgearms

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I found a really cool muzzle break / Flash Hider for an AK and I have the CZ 858. I want to know if the left hand 14 pitch thread on the flash hider can be rethreaded as a right hand 14 pitch thread to fit the CZ? If it can be done and it's expensive, I'd still like to know. If it requires cutting and welding, I'd still like to know. No idea or suggestion is too far out for me. I really like the design and length on this Muzzle Break. Check it out.
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depends on the muzzle od on both rifles.

one could cut the threads out on a lathe , bush it and recut the threads

or have someone make you one brandy new just like it.
 
That would depend on the dia of each piece, if the ID of the flash hider is smaller than the OD of the barrel, you might get away with it. If not I imagine the work involved would amount to more $$ than the hider in the first place.
 
This is quite a common fix, you buy or maked a short thread adapter. One end od the adapter fits the barrel thread and the other end the muzzel break thread. Adapters are often used to fit newer sound moderator (with modern thread fittings) to older military rifles with non-standard fittings. As for cost, I have no idea, But a local machine shop should be able to make one.
 
Bookworm said:
Simplest method would be to drill the muzzle break out on a lathe ---- insert a sleeve and silver solder/weld it in place and then thread the sleeve.

Dave
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Sounds, simple enough. I talked to the manufacturing department at BCIT and the lab assistant said he would have to see it. Sounds like you have a better idea, bookworm. I'm in the GVA, do you know of any shops that would be able to carry that work out. Plus, I can get the Brake for about $30, so I think the work involved would be worth it, if it can be done properly.
 
Reliable Gun of Fraser can probably do the job as well. Do you know the diameter of the thread as well as the pitch? If it is a standard thread (ie 7/16-14). They have that tap. If it is a non-standard diameter then the threads have to be cut with an internal threading tool in the lathe which is more time consuming.
 
"...local machine shop..." Machine shop hourly rates are running over $100 per hour these days. Lot of money for a one time piece.
 
I hear you, on the cost of having the part converted. I am going to search for the most price effective way possible. If it doesn't work, then I think I might be able to sell it to someone as is. It's for an AK.
 
Actually, although it reduces the strength of the threaded attachment, just re-cut the thread. I've done it on 10mm threads many times.
Just run the tap down the hole.
 
And if it isn't strong enough and strips the threads, it'll be the threads you've cut so it won't hurt the barrel, so you are no further behind.

You could still do the bushing thing.
 
14x1.0 is not a standard size, unless it's buried somewhere in the assorted "special" kits available for spark plugs an the like. The normally available metric helicoils are 14x1.5mm and 14x2.0mm.

Is it a 14 mm diameter required, or did the original poster ever say the diameter?

All I see is a statement of the thread being "14 pitch" which normally would mean a 14 tooth per inch thread. In turn, that seems a bit coarse. ???

Cheers
Trev
 
Very simple mathematics. Unwind the threads on the barrel and wined em back on the other way ;o). Or simpler still. Cut .400 inch off the end of the barrel and rethread it to fit the break.
 
Suputin said:
Please include a :) smilie so that everyone knows you are joking.
Do they make a 14x1.0mm helicoil? Because if they do, that's a really good fix.
Click to expand...

Same goes for you.
Click to expand...

Actually I was being serious. I think it would be an ideal solution.
The helicoils are very strong.
Or is the problem with the size? They really don't make a 14x1mm helicoil?
 
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