Gunsmithing Custom diameter thread protector

[Jeremybj]

Hello,

I have done a little scouring of the interweb and haven't found what I'm looking for.

I am looking for a 5/8x24 ID thread protector with a .850 OD diameter.

Anyone know of a guy who might be able to help me out with it?

Thanks,
Jeremy

 

[jonaddis84]

I assume 850 is your muzzle od? If so, the issue you'll have is that your bore is likely not centered perfectly in the barrel, so if you screw on the thread protector (that the od is concentric with the threads) you may end up with it offset on the barrel.

That being said, if you're ok with it I have some blanks I could turn one down for you, pm me if interested.

Galaxy S3 on tapatalk

 

[jonaddis84]

Couldn't post a picture in pm, so here it is. This is obviously exaggerated, but it shows what I'm talking about. Assuming the threads were done properly, they will always be centered around the BORE. If the bore happens to be NOT in the center of the outside diameter of barrel, which it's rarely perfect. When you thread on a protector that has had the OD turned concentric to the threads, you will end up with a step at the shoulder.

Picture if you were to thread on something that the id and od were concentric to this... (excuse my beautiful art)

It's always ideal to have a thread protector installed at time of threading, there is literally no possible way to make it blend perfect without the barrel also dialed in to the OD on the lathe.

Galaxy S3 on tapatalk

 

[xringaccuracy]

To make your thread protector seamless is easy. Screw your thread protector on the barrel, chuck the barrel in the lathe and indicate the outside of the barrel. Once zeroed on the barrel, cut thread protector to match. Remember, start with an oversized protector. If you don't have a lathe, let us know, we can fix you up. To add, as stated above, at the time of threading is ideal. If the bore is offset, you thread the muzzle to the bore, then reset zero to the outside of the barrel then cut the protector.

 

[300sniper]

It's always ideal to have a thread protector installed at time of threading, there is literally no possible way to make it blend perfect any other way.

Galaxy S3 on tapatalk

It is always ideal to have the barrel in hand when making a "seamless" looking thread protector or brake. It doesn't have to be done at the same time as the barrel is threaded because it will be done with an altered setup anyways. It'll cost you more in shipping and machine time if you do it at a later time but it is possible.

 

[jonaddis84]

It is always ideal to have the barrel in hand when making a "seamless" looking thread protector or brake. It doesn't have to be done at the same time as the barrel is threaded because it will be done with an altered setup anyways. It'll cost you more in shipping and machine time if you do it at a later time but it is possible.

I guess what I should have said was its impossible to make a seamless thread protector without the barrel in hand. Unless the barrel was threaded improperly (concentric to OD).