Holding a barrel in a 4 jaw

[LVLAaron]

Copper is soft and can move. I guess it's a matter of preference, do what works for you. I just find a chuck with jaws set up for a pivot point is a lot easier to deal with than a copper ring, a bunch of shims, etc. A lot easier to set up and dial in if there is just a chuck+barrel vs chuck+barrel+a bunch of shims

 

[tac284]

Any opinions on this setup? I wouldn't be opposed to have a dedicated chuck or set of jaws set up like this.

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I personally like it and would do it if I had the need and chuck to give up or had two piece jaws where I could change the top jaw out so I could use the chuck for other purposes.

 

[tobnpr]

Any opinions on this setup? I wouldn't be opposed to having a dedicated chuck or set of jaws set up like this.

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I forget where I saw that- but those are EDM'd into the chuck jaws.
Great idea, just not cheap to do it.

I've got no complaints with the gimbaling V-block setup, everything moves freely as it should.
When I adjust one axis of the outboard spider screws, the breech moves exactly how I expect.

 

[Dusty Stevens]

A surface grinder is what id use if i wanted to do that to a chuck

I forget where I saw that- but those are EDM'd into the chuck jaws.
Great idea, just not cheap to do it.

I've got no complaints with the gimbaling V-block setup, everything moves freely as it should.
When I adjust one axis of the outboard spider screws, the breech moves exactly how I expect.

 

[tobnpr]

A surface grinder is what id use if i wanted to do that to a chuck

How are you going to bore precision holes in hardened chuck jaws with a surface grinder ?

 

[Dusty Stevens]

How are you going to bore precision holes in hardened chuck jaws with a surface grinder ?

Looked like it had each jaw grooved out to hold the round bars. Now i see its actually a hole there

 

[LVLAaron]

The chuck photo I shared with the brass inserts in from an Area419 chambering video for what it's worth.

 

[SKWERLZ]

Any opinions on this setup? I wouldn't be opposed to having a dedicated chuck or set of jaws set up like this.

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I like that.

 

[ridgeway]

How are you going to bore precision holes in hardened chuck jaws with a surface grinder ?

Carbide all day long on a BP. The hard jaws aren't that hard...

 

[Dusty Stevens]

Carbide all day long on a BP. The hard jaws aren't that hard...

I bored some grooves in mine for copper rings. No problem with a carbide insert

 

[Bamban]

After spending a day with Mike Bryant I converted to his workholding scheme on set thru chucks. He uses split steel rings while I use aluminum ones. Have a collection; they are made to fit different sizes. Outboard still have the finger clamps with ball bearings, I have since upgraded the bolts to 12 points. Much easier to adjust than Allen head ones.

 

[Dusty Stevens]

Thats a very nice chuck Nez

 

[LVLAaron]

I like the split ring idea. I'm going to give it a try. I have a Buck 6 jaw that I love but I'm not sold on using it for barrels. Adjusting is kind of an art that I dont quite have yet. I like the 12 point bolts instead of set screws for sure.

 

[Dusty Stevens]

I like the split ring idea. I'm going to give it a try. I have a Buck 6 jaw that I love but I'm not sold on using it for barrels. Adjusting is kind of an art that I dont quite have yet. I like the 12 point bolts instead of set screws for sure.

Send me that buck if you get sick of looking at it

 

[LVLAaron]

It's truly a work of art. I hate using it because it's just so nice to the touch and to the eyes.

 

[Bamban]

It's truly a work of art. I hate using it because it's just so nice to the touch and to the eyes.

Bison set thru chucks are nice (almost as nice as the German made Rohm...lol.. cheers) Here is one in my 30+ yo 1236 lathe, a 3J set thru. The 3J set thru is a utility one, jaws close much smaller than the 6J for other projects besides barrels

 

[Dusty Stevens]

Bison set thru chucks are nice (almost as nice as the German made Rohm...lol.. cheers) Here is one in my 30+ yo 1236 lathe, a 3J set thru. The 3J set thru is a utility one, jaws closes much smaller than the 6J for other projects besides barrels

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Make machining great again

 

[Lucky Shooter]

The pivot just allows the v block to follow the barrel contour. Just use a copper ring...pick them up at Lowe's or home Depot...

Do you have any other info on these copper rings-----have never
seen such while prowling the electrical dept.

I use short copper stubs but the rings sound interesting

 

[WSnyder]

Do you have any other info on these copper rings

I don't think it literally means "copper rings from HD or Lowe's". Most use 4 gauge ground wire and form it into a ring. Go buy a foot or two from Home Depot or Lowe's. It's not hard to wrap a few wraps around a barrel shank or piece of stock and slit the wraps into rings with a hacksaw.

Southwire (By-the-Foot) 4-Gauge Solid SD Bare Copper Grounding Wire 10644390 - The Home Depot

Southwire's Bare Copper is used for residential electrical systems before entering the home, usually at the meter base. It is also used as a residential grounding wire. Solid and stranded bare copper (Classes AA & A) are used for overhead transmission and distribution applications. Solid bare...

www.homedepot.com

 

[Dusty Stevens]

You can also wrap that copper around the jaws- one on each jaw