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Barrel Rifiling

Posted: Sun May 21, 2006 12:34 am
by SpudStuff
I just saw a show on how they mave military issue m-16s. when they rifle the barrel they have a small brass piece that they put in one end of the barrel then using a press, push it to the other side. this works for aluminum so it shoufd work for PVC.

Posted: Sun May 21, 2006 2:35 am
by Benny
please give more info.

Posted: Sun May 21, 2006 6:07 am
by jrrdw
Yes it will, as long as the tool stays straight and doesn't tilt sideways.

Posted: Sun May 21, 2006 11:57 am
by sgort87
You guys do know that rifled barrels exist right? Joel from Spudtech makes them. Look at the first four things on the <a href="http://www.spudtech.com/components.asp">Components Page</a> on Spudtech.

Posted: Sun May 21, 2006 1:10 pm
by SpudStuff
yes i know. I don't think it is right to pay $30 for 5 feet of weakenef pvc.

the tool is the exact size of the ID of the barrel. there are small protrusions that rotate the Tap as i guess you could call it.

Posted: Sun May 21, 2006 1:14 pm
by Flinchy
yes, im not sure where you can purchase that tool, probably your local home depot but im not completely sure. if any of you manage to find this tool please send me a message, i am very anxious to purchase one myself.

Posted: Sun May 21, 2006 1:20 pm
by )DEMON(
it is possible to make one of those tools yourself.

SpudStuff,how do you make those animations?(your avitar)

Posted: Sun May 21, 2006 7:03 pm
by jrrdw
A broomstick with screws in the end, turn the screws to adjust the detph.

Posted: Sun May 21, 2006 8:15 pm
by SpudStuff
SpudStuff,how do you make those animations?(your avitar)
use Adobe Image ready. it comes with photoshop

stare with a image. make a new frame copy of that image. change it just a little then make a copy and repeat

there shoul ba moved some where else

Posted: Sun May 21, 2006 8:17 pm
by SpudStuff
as too making the tool
cut diagonal groves in a piece of dowell and insert a rasor blade

Posted: Sun May 21, 2006 11:03 pm
by boilingleadbath
I can garantee that cutting tool isn't brass. Most likely tungsten carbide with a yellow finish - which is like the carbide chips for my lathe.

Anyway, I believe the method is called broaching. It'll end up being allot harder to cut a barrel like that than with a multi-pass system.

Posted: Sun May 21, 2006 11:18 pm
by sgort87
Someone on Spudtech developed a rifling method a while back and was able to do about a foot of it. I believe - but am not certain - that the mothod was far from the performance that Joel's barrels give. And they do not cost $30 and are not so "weakened" as SpudStuff says. These barrels give a very accurate shot. Check out <a href="http://www.burntlatke.com/rifle150.html">Latke's Spudtech rifled barrel test</a> and <a href="http://www.burntlatke.com/riflemore.html">Latke's interview with Joel on his rifled barrels</a>.

Posted: Mon May 22, 2006 2:22 am
by rna_duelers
I have done it,only with small bore barrels but.Some think im lying i did it witha broom stick and nails,but i did. http://www.spudfiles.com/forums/viewtop ... ng+barrels&

Posted: Mon May 22, 2006 10:08 am
by sgort87
Very nice! How are you controling the angle of spin?

Posted: Mon May 22, 2006 4:05 pm
by boilingleadbath
Sgort, you are a moron.
Cutting grooves in the pipe wall means that the hoop stress has to be concentrated into those thin parts - which being maybe .6 times as thick means that the pressure rating of the pipe is now only .6 times normal. (still 200 or so for 2" pipe...)