I recently started turning barrels and was surprised you didn’t use a follower rest. The chatter must not have been too bad. I almost bought a heavy10 but the ones I seen were worn out. The ways closer to your chuck are probably not the same as near your tail stock and that’s why the finish changed as it got closer to the chuck. The closer to the chuck the more rigidity so your finish should have improved as you got closer to the chuck. Great video man
Wow that's a pretty sophisticated piece of machinery you got there. I just bought an M72 barrel and might need it to be turned down by a gunsmith to the correct journal size. I've been wondering how this process works. Thanks for sharing.
Why do you have the barrel in the chuck instead of having the barrel butt up against a dead center that replaces the chuck so that you "turn between centers " ? Won't this setup of yours have the barrel not run as true to center ?
My lathe only has 20" between centers, and can only reasonably turn an 18" piece of stock between centers if I remove the thread dial. All I'm doing is profiling the outside of the barrel, so 2 to 3 thou of runout doesn't matter for the purposes of the build.
It's a friction thimble micrometer. There's no ratchet and the entire barrel slips when it reaches the correct load. It's my preferred micrometer style.
I assume he accidentally machined the hand guard retainer part of the barrel too thin to fit the M72 retainer and that's why he went with the M76 one? The M72 rear sight is made for the 7.62x39 trajectory, so I have to mount my PSL sight to a tube that is the same size as the M72.
While I'm definitely not above missing my target dimensions, that's not the case in this instance. Since I'm using a PSL front trunnion I'm also using a PSL rear sight block because I didn't want any unsightly gaps/piston length issues that come with mixing Zastava trunnions/RSB's with standard RPK/AKM pattern trunnions/RSB's. The PSL rear sight block journal is slightly smaller than the M72 handguard retainer, so it will not allow the use of an M72 retainer unless I pressed a collar or bushed the retainer. The next largest diameter handguard retainer was the M76 unless I went with a complete custom made one or went with a bolt-on retainer, which I didn't want.
I recently started turning barrels and was surprised you didn’t use a follower rest. The chatter must not have been too bad. I almost bought a heavy10 but the ones I seen were worn out. The ways closer to your chuck are probably not the same as near your tail stock and that’s why the finish changed as it got closer to the chuck. The closer to the chuck the more rigidity so your finish should have improved as you got closer to the chuck. Great video man
nice workaround! make what you got work for you! I like it.
Wow that's a pretty sophisticated piece of machinery you got there. I just bought an M72 barrel and might need it to be turned down by a gunsmith to the correct journal size. I've been wondering how this process works. Thanks for sharing.
Ad a power bank to your GoPro it will last longer on recordings. Nice to see a newcomer to the channel good video thanks
Why do you have the barrel in the chuck instead of having the barrel butt up against a dead center that replaces the chuck so that you "turn between centers " ?
Won't this setup of yours have the barrel not run as true to center ?
My lathe only has 20" between centers, and can only reasonably turn an 18" piece of stock between centers if I remove the thread dial. All I'm doing is profiling the outside of the barrel, so 2 to 3 thou of runout doesn't matter for the purposes of the build.
How are you getting a proper measurement when you aren't using the thumb ratchet at the end of the mic? 🤔
It's a friction thimble micrometer. There's no ratchet and the entire barrel slips when it reaches the correct load. It's my preferred micrometer style.
@@StrongholdArmory you ever finish this build?
They're jamming your video. The TH-cam jammers are on to you.
I assume he accidentally machined the hand guard retainer part of the barrel too thin to fit the M72 retainer and that's why he went with the M76 one?
The M72 rear sight is made for the 7.62x39 trajectory, so I have to mount my PSL sight to a tube that is the same size as the M72.
While I'm definitely not above missing my target dimensions, that's not the case in this instance. Since I'm using a PSL front trunnion I'm also using a PSL rear sight block because I didn't want any unsightly gaps/piston length issues that come with mixing Zastava trunnions/RSB's with standard RPK/AKM pattern trunnions/RSB's. The PSL rear sight block journal is slightly smaller than the M72 handguard retainer, so it will not allow the use of an M72 retainer unless I pressed a collar or bushed the retainer. The next largest diameter handguard retainer was the M76 unless I went with a complete custom made one or went with a bolt-on retainer, which I didn't want.
What Lathe is that?
South Bend 10L, aka Heavy 10.