Chris Mackey
Site $$ Sponsor
The two and two design, makes indicating 5 groove Bartlein ppc barrels interesting
Set-tru chuck?
- Thread starter Chris Mackey
- Start date
WSnyder
Silver $$ Contributor
It must be a spatial thinking thing but when I used to use my 6 jaw Bison set-tru with copper wire I didn’t have any thought or trouble at all when dialing in 5R’s. I just did it??? Same with front and rear spiders that aren’t indexed/aligned together.
Might also be that I had done plenty of machining well before I did any gunsmithing so already had my head wrapped around the concepts?
Chris Mackey
Site $$ Sponsor
It seems where I need to make an adjustment is in the larger gap, sometime it takes a while and sometimes it doesn’t, my frustrations is the fine adjustments are not quiet enough to get that extra .0001-.0003, sometimes it just won’t go that extra little bit.
lots of good info guys, thanks a bunch, I can feel my groups shrinking, lol.
lots of good info guys, thanks a bunch, I can feel my groups shrinking, lol.
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Oh man!With swivel tips!
(I sure wish these were available in fine thread)
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.www.mcmaster.com
Those are neat!
I considered a ball/sockets arrangement with a set screw and brass end.
Would not be too difficult to make.
LVLAaron
Gold $$ Contributor
Yeah. I found these too late. All of my jigs and chucks are fine thread... if I were starting fresh I'd plan on using these.
Certainly can be a bit of a merry go round to indicate.
Once you have indicated in 4-500 barrels you won't even notice how many grooves there are. It becomes some what automatic.
WSnyder
Silver $$ Contributor
I never even thought about trying to align grooves with jaws. I just put the barrel in and go to work dialing it in. Even though it is individual lands and grooves I still treat it as a circle, an interrupted circle but still a circle.
Chris Mackey
Site $$ Sponsor
I just pulled a 13.75 Hawk Hill out of the lathe two days ago, that was my number 18, so I got a little to go yet.
Those swivel tips look sweet, should be an easy swap and stronger than my brass screws, for the tail stock. That HH barrel was 22” and could run with my jaws on but I’ve had best luck out of 20.25-20.5”, that’s where I gotta trim the fat. I only do ppc barrels, that’s all I shoot.
Those swivel tips look sweet, should be an easy swap and stronger than my brass screws, for the tail stock. That HH barrel was 22” and could run with my jaws on but I’ve had best luck out of 20.25-20.5”, that’s where I gotta trim the fat. I only do ppc barrels, that’s all I shoot.
GT Accuracy
Site $$ Sponsor
For those of you looking at swivel screws....these are the true center grip
www.jergensinc.com
Socket Toggle Screws | Jergens Workholding | Jergens Inc
Socket Toggle Screws by Jergens, Inc. 80 Years Manufacturing Efficiency in Cleveland, Ohio
www.jergensinc.com
LVLAaron
Gold $$ Contributor
For those of you looking at swivel screws....these are the true center grip
Socket Toggle Screws | Jergens Workholding | Jergens Inc
Socket Toggle Screws by Jergens, Inc. 80 Years Manufacturing Efficiency in Cleveland, Ohio
Darn... still no fine thread.
GT Accuracy
Site $$ Sponsor
you won't find a fine thread in this size anywhere...i don't believe.Darn... still no fine thread.
luckyshot52
Gold $$ Contributor
luckyshot52
Gold $$ Contributor
Chris, consider a chuck adaptor plate and drill 4 holes around periphery. Then tap them for the swivel tip screws. 3/8 should be large enough.
Dusty Stevens
Shiner
Start fresh. Its good practice
LVLAaron
Gold $$ Contributor
Not a chance. I could put a second set of holes 45' apart from my current ones, though.
LVLAaron
Gold $$ Contributor
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