Making a sharps barrel in my lathe.

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homebrew .357
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Joined: Thu Aug 11, 2011 2:32 am

Re: Making a sharps barrel in my lathe.

Post by homebrew .357 » Sun Nov 09, 2014 2:05 am

More pic`s, Homebrew.357. 8)
Attachments
P1010935.JPG
The drive chain assy on brackets.
P1010936.JPG
G/box on and backend crank assy drive.
P1010937.JPG
Rifling rod fitted to drive shaft.
P1010938.JPG
G/box clamped to vice base, rifling rod through barrel for start.

Msalm
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Joined: Tue Jan 07, 2014 10:02 pm

Re: Making a sharps barrel in my lathe.

Post by Msalm » Sun Nov 09, 2014 5:28 pm

That is pretty danged ingenious and keep em coming! I have two riflers, both hand pulled jobs, one with the old wooden guides/drums and the other is a home built sine bar rifler with linear bearings and shafting for ways. Slow twist only on these though.

redneckalbertan
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Location: South Central Alberta

Re: Making a sharps barrel in my lathe.

Post by redneckalbertan » Sun Nov 09, 2014 11:20 pm

Do you push and pull the cutter through the barrel? Or just pull?

homebrew .357
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Re: Making a sharps barrel in my lathe.

Post by homebrew .357 » Mon Nov 10, 2014 2:54 am

Hi, The cutter head is pulled through with the cutter raised from the breech end and down when cutter is returned back to start, so you are only cutting when it is pulled through. Because of slack take up with the gear box and drive train , It`s going back in a different position, so must be down or could stuff up your rifling. When I did this I did not realise I could get a smaller sprocket for a faster twist, but at the time I was only looking at making one gun. I was quite pleased that the new small sprocket gave a twist of 1-18", just what I wanted for this 1874 Sharps and now the barrel is set up and being rifled, the finale length is 27", had to cut off 2" to fit the rifling rod.
O well, it will be a KIWI Sharps carbine, :lol: Homebrew.357.
Attachments
P1010939.JPG
Cutter head at breech end to start.
P1010942.JPG
First cut, pulled through.
P1010944.JPG
T/C cutter working, fine chips.
P1010946.JPG
Adjustment is big nut, screwed out so ramp goes in more, just a bit.

homebrew .357
Posts: 213
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Re: Making a sharps barrel in my lathe.

Post by homebrew .357 » Wed Nov 12, 2014 3:34 pm

Thought you all would be hanging out for the end results of all this rifling and stuff, yep she`s done ,in the ruff stage, but with a bit of lapping and polishing should be good to go, but have figger out a way to bore out to .450", cast iron lap?, or something like that. 8) Homebrew.357.
Attachments
P1010947.JPG
In the raw, still on the lathe.
P1010948.JPG
Bit of elbow grease will see it right.

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GeorgeGaskill
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Re: Making a sharps barrel in my lathe.

Post by GeorgeGaskill » Wed Nov 12, 2014 3:48 pm

Maybe a piloted spiral reamer so it won't catch in the grooves?

homebrew .357
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Re: Making a sharps barrel in my lathe.

Post by homebrew .357 » Thu Nov 13, 2014 2:34 am

Well if I could get one, and just for a one off job,$$$. I will just have to lap it out , make up a brass lap with slot cut across dia at .445" with a small wedge for slot. Fine grinding past and lots of oil, a tap on the wedge to expand lap, keep going to .449" ID, then polish with 1200 grt paper, that's my thinking. Could even get a slight taper in the barrel. 8) . Homebrew.357.

hammermill
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Re: Making a sharps barrel in my lathe.

Post by hammermill » Thu Nov 13, 2014 5:02 pm

which ever way you lap it, I would suggest leather rings impregnated with polishing /lapping medium the shoulders should get a work out for sure

hammermill
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Re: Making a sharps barrel in my lathe.

Post by hammermill » Thu Nov 13, 2014 5:17 pm

I would vote for a stack of leather washers impregnated with polishing compound and lube going the same direction each time. cut the rings with a punch.??

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GeorgeGaskill
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Re: Making a sharps barrel in my lathe.

Post by GeorgeGaskill » Fri Nov 14, 2014 4:55 pm

I think you should stay with a hard lap to control where the lapping occurs. A soft one will end up lapping everywhere.

homebrew .357
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Re: Making a sharps barrel in my lathe.

Post by homebrew .357 » Fri Nov 14, 2014 5:52 pm

That's my thinking to, I only want to take .002" off the top of the lands, so something ridged so as not to round off the lands. But once that's done the leather polishing idea sounds good. At the moment I`m lapping the grove bottoms, made up a cast iron bit to fit in where the cutter goes and rubs instead of cutting, Ajax mixed with a bit of oil to clean up the cutter marks . Thanks guys, Homebrew.357. 8)
Attachments
P1010951.JPG
Just rubs away the scratch marks.

homebrew .357
Posts: 213
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Re: Making a sharps barrel in my lathe.

Post by homebrew .357 » Mon Nov 17, 2014 3:08 pm

At the end of the day it pays to keep it simple, so a slot cut in a length of wooden dowel with a bit of 600grt paper and thin plastic packer ,clamped in vicegrips and lathe spinning plenty of fluid, done. Lead slugged it, bore now .457"/.458" taper to the front.
Just have to set up to cut the barrel profile, looking at .800" at the muzzle and 1.120' at the breech. I would like to make octagonal , will just have to work out how to do it. :? Cheers, Homebrew.357. 8)
Attachments
P1010952.JPG
Keeping it simple.
P1010953.JPG
Set up for cutting barrel profile, you move the tailstock.

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