Part two of the multi part interview with Bartlein Barrels Sniper's Hide Online Video Visit www.snipershide.com Or chat in our forum at forum.snipershide.com
It's amazing that you're able to take off a tenth and a half with carbide. I've never been able to take a proper cut on anything but delrin with that kind of depth.
You made your own barrel? Was it a rifle barrel or a handgun barrel? And can you tell me more how you did that? I'm always intrigued by this because to me barrel making has always seemed like 50% skill and science, and 50% dark magic. How to accurately drill such a long hole without veering off course, and after that the reaming and de-stressing the drilled blank. Then of course the most difficult part, the actual rifling of the barrel itself, followed by lapping and a final de-stressing before its a usable and rifled barrel blank, ready to be turned to it's final dimensions.
I’m scratching my head over gain twist. The bullet accelerates from 0 to 3,000 fps in 2 feet and not in a linear acceleration, ie- mostly in the first foot or so. In a normal barrel the bullet leaves the muzzle spinning at 200,000 rpm. Are we trying to stabilize the acceleration of the spin with a gain twist? Or what is the reasoning?
It's so you can push it harder at the beginning without as much pressure and then spin it up to the desired twist at the end of the barrel. It gives you some velocity.
I wonder how at Bartlein they test their barrels Amazing products from what i understand I would imagine a special bench to avoid rifle impact on final accuracy
I realize that the chucks used to hold the barrels as they are being rifled don't spin and are used just to hold the blank but it still kinda triggers my ocd to see the chuck key left in them as doing that on a lathe will get you kicked out of most machine shops I know. amazing process though
It's still a bad practice. A bump of a key and the chuck tension might change. If a company isn't doing 100% to remove the possibility of any error, then they shouldn't use the word precision.
99% of the rifle process is done without the hands of the operator touching the machine. It is setup and run and checked for specs at the end and then removed from the machine. Very little chance of the chuck key being moved......but I do understand your OCD point of always removing it.
@@arrowandrew2613 and like I said I completely understand each shop will have there own processes and even understand the reason they leave the key in the chuck but it just looks weird and feels uncomfortable to see a machine operating with the key left in the chuck.
Me too, I literally FLINCH the second I see it. As an apprentice, I once saw someone "accidentally" start up with the chuck key in it, and still remember the frigging solid THUMP as it flew across the shop and took a lump out of the wall
ah well digital readouts, its something that we have been doing a long time milling and cutting metal, but the set up looks clean for a machine shop, well more then I am used to seeing with oil all over and dirt dirty clothing of the workers. mostly automatic but you still need someone that can make sure the machine is doing what it is supposed to, and know how to set the machine, with as hes said the push of the button on the screen. I guess Bartlein makes some of the top for precision shooters at least that seems to be the jest of what I read on the internet on the issue, and they use cut rifleing like kreiger does as well, cant belive how clean the whole operation is though.
im a machinist and i noticed the same thing...i work in a aerospace shop that is way dirtier and run down....0 maintenance its just so stupid i laugh every time something breaks.... the owner comes from a lot of money and doesnt take care of his toys......this shop looks very professional and nice modern machines....im getting one of those gain twist barrels
They can't even be bothered to answer questions. This company is terible, get your barrel from some that actually wants to sell to the public. These clowns only want to deal with the government or professionals. If you are just a regular person trying to upgrade forget about it. You are not worthy of their time. Just look at the posts. They didn't respond to 1. Buyer beware with this company.
ah welcome to the world of machining lol. After you get the groove started the tool will want to follow it after each pass though, same reason you use a spot drill to keep a long drill from walking off center.
In this operation the chucks are used as holding devices only. They do not spin during the rifling procedure. The precision and accuracy of the rifling operation has nothing to do with the run out of these chucks.
in barrel manufacturing.... you order a rifled blank... the bore and rifling are true to each other... but not necessarily the blank... the blank is a cylinder of steel... the bore cut in that cylinder and rifeling put in to the bore are cut true to each other... but not necessarily true to the outside of the original cylinder... the outside is considered expendable material when a gun smith receives the rifled blank... he must cut off the end of the blank where the tooling entered the bore... and use his tools to align the rifled bore true to his lathe.. and then cut the outside of the blank true to bore...a very highly skilled gunsmith can do all operations from finish contouring, threading, chambering, crowning and installing muzzle breaks and much more very very accurately and with machining techniques that do not introduce stresses that may harm the harmonics of the barrel as it whips in use. a proper barreling job also involves timing and head-spacing; and can require modifications to the bolt face, extractor and other components including the stock of course.. Gunsmiths biggest pay seems to be the honor of being the town gunsmith... and of course being close to the industry and people who remind of some of those better parts of life; that said... if you can...please take care of a good gunsmith if you find one... don't be cheap on him and compare what he does to what you can buy off of a shelf for a few hundred bucks. Some get into additional heat treatment and stress relief after all is said and done.. .which should not be necessary...if all was carefully machined in normal circumstances... some though... as you know get ultra high tech... far beyond my pay grade. is a good question... you must be a machinist
One of, if not the finest precision rifle barrel manufacturers in the world.
very clearly a great company to work for... and be a part of... you guys are blessed and a half... thanks for the video.
Amazing work! Love the high degree of precision!
It's amazing that you're able to take off a tenth and a half with carbide. I've never been able to take a proper cut on anything but delrin with that kind of depth.
He means 0.00015 inch per cut. That is shallow.
@@rickoshea8138 exactly. normally that would just cause rubbing
Been there, they truly do great work.
Not only do they make a great product, Im sure these are great American Jobs. Hell yea, I love seeing videos like this!!
Dude: "This machine has over 2 million strokes!"
Me: ....giggity...
Beautiful, I love rifling, done my first with a hand made button.
You made your own barrel? Was it a rifle barrel or a handgun barrel? And can you tell me more how you did that? I'm always intrigued by this because to me barrel making has always seemed like 50% skill and science, and 50% dark magic. How to accurately drill such a long hole without veering off course, and after that the reaming and de-stressing the drilled blank. Then of course the most difficult part, the actual rifling of the barrel itself, followed by lapping and a final de-stressing before its a usable and rifled barrel blank, ready to be turned to it's final dimensions.
I’m scratching my head over gain twist.
The bullet accelerates from 0 to 3,000 fps in 2 feet and not in a linear acceleration, ie- mostly in the first foot or so.
In a normal barrel the bullet leaves the muzzle spinning at 200,000 rpm.
Are we trying to stabilize the acceleration of the spin with a gain twist?
Or what is the reasoning?
It's so you can push it harder at the beginning without as much pressure and then spin it up to the desired twist at the end of the barrel. It gives you some velocity.
I wonder how at Bartlein they test their barrels Amazing products from what i understand I would imagine a special bench to avoid rifle impact on final accuracy
Great video
Cool machines.
I realize that the chucks used to hold the barrels as they are being rifled don't spin and are used just to hold the blank but it still kinda triggers my ocd to see the chuck key left in them as doing that on a lathe will get you kicked out of most machine shops I know. amazing process though
It's still a bad practice. A bump of a key and the chuck tension might change. If a company isn't doing 100% to remove the possibility of any error, then they shouldn't use the word precision.
99% of the rifle process is done without the hands of the operator touching the machine. It is setup and run and checked for specs at the end and then removed from the machine. Very little chance of the chuck key being moved......but I do understand your OCD point of always removing it.
@@arrowandrew2613 and like I said I completely understand each shop will have there own processes and even understand the reason they leave the key in the chuck but it just looks weird and feels uncomfortable to see a machine operating with the key left in the chuck.
Me too, I literally FLINCH the second I see it. As an apprentice, I once saw someone "accidentally" start up with the chuck key in it, and still remember the frigging solid THUMP as it flew across the shop and took a lump out of the wall
Thats amazing
Either that guy is a giant or the other one is standing in a hole.
I heard Bartlien use to be partners with Krieger. Both cut rifling.
They worked at Krieger. They left and started Bartlein
How do they hand lap gain twist barrels? Uniform rifling hand lapping makes sense, but progressive would bind up, right?
No it is subtle, it does not bind anything up, it's not like it lays over itself
By "2007 tenths" did the operator mean "2007 ten thousandths of an inch?"
.0027" so 2 thousands and 7 tenths of a thou left to cut you fucking mongoloid
He said," 2 thousandths and 7 tenths (meaning 7 tenths of a thousandth) .0027"
Easily misunderstood if you never worked in a machine shop. ;)
Badass
ah well digital readouts, its something that we have been doing a long time milling and cutting metal, but the set up looks clean for a machine shop, well more then I am used to seeing with oil all over and dirt dirty clothing of the workers. mostly automatic but you still need someone that can make sure the machine is doing what it is supposed to, and know how to set the machine, with as hes said the push of the button on the screen.
I guess Bartlein makes some of the top for precision shooters at least that seems to be the jest of what I read on the internet on the issue, and they use cut rifleing like kreiger does as well, cant belive how clean the whole operation is though.
a clean shop is a very special thing for sure.
im a machinist and i noticed the same thing...i work in a aerospace shop that is way dirtier and run down....0 maintenance its just so stupid i laugh every time something breaks.... the owner comes from a lot of money and doesnt take care of his toys......this shop looks very professional and nice modern machines....im getting one of those gain twist barrels
What type of lube is it?
They can't even be bothered to answer questions. This company is terible, get your barrel from some that actually wants to sell to the public. These clowns only want to deal with the government or professionals. If you are just a regular person trying to upgrade forget about it. You are not worthy of their time. Just look at the posts. They didn't respond to 1. Buyer beware with this company.
And im stuck rebuilding industrial water pumps for a living. Shit.
How do you cut 5 grooves with 46 passes and not end up with some dimensional differences along the way?
ah welcome to the world of machining lol. After you get the groove started the tool will want to follow it after each pass though, same reason you use a spot drill to keep a long drill from walking off center.
Where are your “” I’ll stop now. It was in good fun. Light hearted not meant to offend
Damn
Top
I'm at a loss as to why they would use 3 jaw chucks, and large ones at that.
In this operation the chucks are used as holding devices only. They do not spin during the rifling procedure. The precision and accuracy of the rifling operation has nothing to do with the run out of these chucks.
in barrel manufacturing.... you order a rifled blank... the bore and rifling are true to each other... but not necessarily the blank...
the blank is a cylinder of steel... the bore cut in that cylinder and rifeling put in to the bore are cut true to each other... but not necessarily true to the outside of the original cylinder... the outside is considered expendable material
when a gun smith receives the rifled blank... he must cut off the end of the blank where the tooling entered the bore... and use his tools to align the rifled bore true to his lathe.. and then cut the outside of the blank true to bore...a very highly skilled gunsmith can do all operations from finish contouring, threading, chambering, crowning and installing muzzle breaks and much more very very accurately and with machining techniques that do not introduce stresses that may harm the harmonics of the barrel as it whips in use.
a proper barreling job also involves timing and head-spacing; and can require modifications to the bolt face, extractor and other components including the stock of course.. Gunsmiths biggest pay seems to be the honor of being the town gunsmith... and of course being close to the industry and people who remind of some of those better parts of life; that said... if you can...please take care of a good gunsmith if you find one... don't be cheap on him and compare what he does to what you can buy off of a shelf for a few hundred bucks.
Some get into additional heat treatment and stress relief after all is said and done.. .which should not be necessary...if all was carefully machined in normal circumstances... some though... as you know get ultra high tech... far beyond my pay grade.
is a good question... you must be a machinist
3 jaw chucks are self centering, less setup time than 4 jaw, and also why would you use a 4 jaw if every workpiece is going to be round?
Ammunition test barrels can have a very large outside breech diameter. Some as large as 2.5"
the cutting tool is self guiding, the chuck concentricity has no effect on it. Much like honing.
Hammer forged barrels are better.
Lol tell that to the scores
Cringing a little at a "gauge" being on the shop floor and handheld.
These guys have it figured out