Hey there, I have a unthreaded barrel that measures 5/8 inches . Would a 1/2 inch brake be good to go ? If I have to have the barrel turned down from 5/8 to 1/2 inch , will this have any negative effect on anything? Thanks for any opinions. The brake is a Holland 1/2x28.
Will a 1/2-28 brake be good for a unthreaded 5/8 muzzle.
- Thread starter Brianma65
- Start date
You're good. But you will need to have the barrel done on a lathe. It will need to have the end turned down to a couple of thou less than 1/2 and then threaded. You can't just jam the 5/8's end into a 1/2 inch die.
The need for the thread to be truly axial and centered with the bore also says that it needs to go in a lathe. Especially with the need to remove that 1/16 inch of metal per side.
The good news for you is that the shoulder produced by turning the barrel down to the thread size is nigh on perfect.
The need for the thread to be truly axial and centered with the bore also says that it needs to go in a lathe. Especially with the need to remove that 1/16 inch of metal per side.
The good news for you is that the shoulder produced by turning the barrel down to the thread size is nigh on perfect.
View attachment 41377
so fiction wise it's ok, the muzzle being turned down from 5/8 to a 1/2? I know you can't jam a 5/8 into a 1/2. Not steel anyway
Maybe I explained it wrong or I'm understanding it wrong. The Brake has a 1/2 inch thread , so I'm assuming it's meant for a 1/2 threaded barrel? My barrel, which is unthreaded measures 5/8 inches. So I'm assuming (again) that a 5/8 brake would fit . But if I have the smith turn my barrel down from 5/8 to 1/2 will this have any negative effects on the barrel? Or should get a brake that measures 5/8? Thanks
Your could bore and thread the brake to 5/8-18 and thread the barrel to suit. Or get a brake with a 5/8-18 thread, thread the barrel to match.
Or you could turn the barrel and thread it 1/2-28 and install the brake that you have.
Best practice is to set the barrel up in the lathe, centered on the bore. Do the threading. Install the brake. Bore the brake to the proper diameter while it is on the barrel. This way, the bore and brake will be truly coaxial.
If the barrel were mine, I would thread it for 5/8, and install a matching brake.
I assume that the Holland brake you have is for an AR, if it was made with 1/2-28 threads.
Or you could turn the barrel and thread it 1/2-28 and install the brake that you have.
Best practice is to set the barrel up in the lathe, centered on the bore. Do the threading. Install the brake. Bore the brake to the proper diameter while it is on the barrel. This way, the bore and brake will be truly coaxial.
If the barrel were mine, I would thread it for 5/8, and install a matching brake.
I assume that the Holland brake you have is for an AR, if it was made with 1/2-28 threads.
A Holland brake is a good brake. When I mentioned AR use, I was thinking about the diameter of the bullet passageway.
As Robert has pointed out, 5/8-18 is more common for .30 rifles. You could easily sell the 1/2-28 Holland, and get a 5/8" .30 brake.
As Robert has pointed out, 5/8-18 is more common for .30 rifles. You could easily sell the 1/2-28 Holland, and get a 5/8" .30 brake.
Yep, me too.
IMO, .500" makes a thin muzzle for a .308 bore.
Yes, you can do it, but you have a .625" muzzle then a much bigger shoulder in that pic you posted.
