Butch Lambert
Active member
Lee,
I think you would have better luck with Copper tips.
I think you would have better luck with Copper tips.
How long to chamber a barrel ?
- Thread starter Hal
- Start date
JerrySharrett
Senile Member
Stick with the brass. For as small of contact as you will have on the bolt tips, copper is much too soft and malleable. I use pre 1982 copper pennies to chuck with but that contact area is much greater.
As to the workpiece moving, if you are properly set up and have good, free cutting tooling, don't worry about it. You need to rough the tenon then predrill the chamber and rough the end bevel. Then reindicate our setup before doing any finishing. Then finish turning the tenon, then finish the chamber reaming. And finally, cut the threads, and finish the cone.
Some of you guys new to machining would be in horrors to see a CNC lathe like the Haas or Kelblys new Mazak Integrex doing material removal!!
http://www.mazakusa.com/processpage.asp?lngProcessID=3
T
timbertoes
Guest
Jerry, my Brain goes a bit crazy when, the few times I have made deep cuts in milder steels, the Vipers venom is filling the garage with smoke like a green-wood campfire 
Makes me back off.
I guess the real thing is, never having the industry experience seeing these big DOC's performed, and I don't want to destroy tool bits. Also concerned from a safety viewpoint too.
Today, I think I will try some heavier cuts. I have a bit of SS I picked up yesterday, although an unknown SS. its 1.25 and I need 1".
but do I risk a Warner HSS insert or a carbide insert... lol.
also, Jerry your reply had "5hp" was that a typo or did you miss the 1 in front of .5 (1.5hp). my one good book does give the calcs for HP required.
ill run the numbers.
as everything I do take so much longer because of light DOC, I would really like to move up in this respect. it means trying it of course, against the way the lathe or mill behaves I suppose.
Makes me back off. I guess the real thing is, never having the industry experience seeing these big DOC's performed, and I don't want to destroy tool bits. Also concerned from a safety viewpoint too.
Today, I think I will try some heavier cuts. I have a bit of SS I picked up yesterday, although an unknown SS. its 1.25 and I need 1".
but do I risk a Warner HSS insert or a carbide insert... lol.
also, Jerry your reply had "5hp" was that a typo or did you miss the 1 in front of .5 (1.5hp). my one good book does give the calcs for HP required.
ill run the numbers.
as everything I do take so much longer because of light DOC, I would really like to move up in this respect. it means trying it of course, against the way the lathe or mill behaves I suppose.
E
eww1350
Guest
If you are thinking that time to chamber a barrel is relevant...then you are on the wrong track..if you are in business and have a large workload many of the suggestions posted by others will help you reduce your time (time is money)...you will need to have dedicated machines, tool holders, drills, boring bars, documented settings, tools, calculator, specialty fixtures etc,etc,etc..all this preparation will reduce your time to fit a barrel..but if you are just chambering your own barrels what difference does it make...I usually take 2 days (about 3 hours total in one day) gives me time to take a break, answer the phone, eat a snack or lunch, talk to visitors, check the internet...etc.
But if you are in the business to make a living you will need to be able to do 2-4 barrels a day just to pay your bills...cause the equipment and tools will put you in debt for a long time..
But if you are in the business to make a living you will need to be able to do 2-4 barrels a day just to pay your bills...cause the equipment and tools will put you in debt for a long time..
JerrySharrett
Senile Member
No Al, aluminum is fine. The buffer material under the chuck jaws has a much greater contact area than the probably 1/4 to 5/16 bolts,
My point was that using copper vs brass tips on the spider bolts, I would much prefer brass.
Butch Lambert
Active member
If you are thinking that time to chamber a barrel is relevant...then you are on the wrong track..if you are in business and have a large workload many of the suggestions posted by others will help you reduce your time (time is money)...you will need to have dedicated machines, tool holders, drills, boring bars, documented settings, tools, calculator, specialty fixtures etc,etc,etc..all this preparation will reduce your time to fit a barrel..but if you are just chambering your own barrels what difference does it make...I usually take 2 days (about 3 hours total in one day) gives me time to take a break, answer the phone, eat a snack or lunch, talk to visitors, check the internet...etc.
But if you are in the business to make a living you will need to be able to do 2-4 barrels a day just to pay your bills...cause the equipment and tools will put you in debt for a long time..
I agree with you.
I havent had anything move on me while cutting threads or a tenon, but i did have a 30cal barrel spin on me while cutting the chamber. Broke the reamer to. what a mess! That was the third barrel i had ever chambered, and i was using the reamer to cut the hole chamber. i no longer do this on anything bigger than a ppc. After having this single experience, i cant help but think about it! LOL!! I sure dont want this to happen again. taking a little bit smaller cuts at one time is a good trick for my piece of mind.
I also worry about putting to much force on my barrels with the jack screws. We are working on some new set up tools for the new machine and with these new tools i think everything will be rock solid. Ill report more on that after the tool is complete. I think most will find it very interesting. Lee
I also worry about putting to much force on my barrels with the jack screws. We are working on some new set up tools for the new machine and with these new tools i think everything will be rock solid. Ill report more on that after the tool is complete. I think most will find it very interesting. Lee