Thread: Rifling thinge upgrade.

Hi all, Had a rethink on my barrel rifling setup as I could only cut rifle a left hand twist, so using the sine bar method I can now get a twist from 1-18 to 1-70" and right hand!!. I had a meter of mild steel 1" round, an old brake cylinder was machined to slide on this and attached to a bit of square ali with a slider setup driving a loop of bike chain to drive the rifling cutter rod," must have bike chain". The round bar is mounted at the back of the lathe and can be raised up and down to give the different twist rate by cranking the sliding head holding the cutter rod. Hope you all under stand this and I don't know if it will work yet, waiting to get in some stock to have a go. There`s no such thing as "Can't do it". Pics of the setup. Homebrew.357.
, The round shaft at the back of the lathe.
, Chian loop that drives cutter rod on ali slider.
, Brake cyl slides along shaft.
, Back of the slider, goes up and down as it slides along the shaft.

Took me a while Doug,reading, looking at the pics then click,should work

Took me a bit to work it out and a few small bearings on the slider got things working, had to make the small sprocket to get the right ratio and now its working a treat. Will have go at doing a few .45 black powder barrels with a 1-48 twist and give them a good lapping to get things smooth.
, using my toolpost grinder head to hold the R/rod.
, A closer look.

once again the prize for most interesting forum content goes to @homebrew.357

brew ya old bugga ya done it again!!ya bloody beauty!listen, gadget and me wanna know can ya machine up a crusaders jersey to fit GSP follower-mild stainless would do -hes got a bit of pork round his midriff and hes prone to bein a bit explosive when we niggle him so yeah i thought id have a yarn to you.
Bites-like a geriatric fox terrier when the religious mob knock on ya front door.,might pay to weld up a nosebag while youre at it!!!
oh yeah while youre on the lathe-can ya mill up a .50 cal barrel for his 20g remington shotty-reason being he hits more geese than me and this way at least I get the chance to loose off all 8rounds in my mighty escort semi before it impales itself on me bloody barrel!
I reckon with a single slug hed have only 99%chance of hitting the bloody thing!! before me

I know it`s all sorts of bits and pieces, but I just use comeinhandy bits like an old tap handle to adjust the shaft up and down to change the twist rate at the back of my lathe.
Hi Kotuku old mate, I through you were practicing with a shovel on a cows rear end, look don`t worry mate, I've just knocked you up the absolute can't miss all time goose buster and a sneaky hide out blunderbuss to finish them off. Just save up all your bottle tops for loading!!, keeps the cost down.
, Adjustment thingei for twist changing.
Kotuku, shes good to go. , Yar ca`t miss!!.
, The bottle cap busting boot gun, don`t shoot your foot off.

Handy things those clothes pegs

Well bugger me days, obviously Chop3r you know your top off the line measuring stuff, those pegs are my twist ratio guides. One is touching the one on the rifling shaft , the crank handle is turned till it`s not touching, this gives me how much slack movement there is before the r/rod moves, it`s .010mm. To get a 1-48" twist I just go half a turn of the r/rod = 1-24", or .61.20mm and _ .010mm for the slake, so you end up with a twist of 1-48". A peg is set straight up on the r/rod and cranked along till it`s pointing straight down, at .61.20mm I`v got it, will very close to it. In a 27" barrel it would not be a full turn , this is very teko stuff.
, Pegs touching, a frogs hair gap!, stop, that's your slack.
, Half turn down is half the twist.

Now here`s something you don`t see very often, I had to have a go at rifling a home made barrel on my lathe with my new teko sine bar setup. Ok, yes I had to drill the hole, consider it done, bore came out at .448" and with a good lapping .450" , set the barrel up for the new and improved cut rifling job and it worked a treat, now have a .450" bore, six groves single point cut rifling x 1-48" right hand twist to .459". This is made from 1" dia asis 12-15 steel shaft and is for a muzzle loading black powder rifle only, but hey, it works, there`s no such thing as "Can't do it", The pic`s.
, The rifled tube of steel.
, End trimmed, crowned, blank barrel.

now make six more and wield them together then add a bike seat and pedals and you have a black powder Gatling gun
Come on Cahill if you use letters instead of numbers that should throw him off the sent

Pedals, I think I`v got a electric motor around here some where!!.

so a cleaver fella like yourself could now turn the outside of that to slide neatly inside a .12ga and have end same dimentions as a case so it holds in place .two of them say 20" long and you would have a heavy as shit .45/70 double by sliding them into old betsy...... as to how accurate the setup would be??? could see it being great for grins and giggles and if you can get em to print where you want them,plurry handy as bush rifle....now somewhere in back of cabinet is a single barrel .12ga gathering dust just screaming out for one.........

mate ya next assignment is to machine up a cahill butt plug-rifling is entirely up to you.make it shiny so itll take a goodcoat of lubricant and make it long so when its inserted it comes to rest between his ears. calibre -again your choice.

Na, slipping in a couple of SSK.950 JDT barrels would be the go, I`ll let micky duck have first shot!!, at a flock of them.
, there you go, just loaded up a few, 500gs 3f.

That sort of stuff is above my pay level , I`m not into the high power stuff only black powder load pressures. I think a .444 marlin would be better than a .410 slug in the bush, think of a .44mag on steroids and you would need a much better barrel for copper jacket bullets than I can make, definitely a job for a gunsmith.