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Post by Charger Fan on May 28, 2009 12:32:19 GMT -5
The thought of trying to figure out the cylinder indexing makes my brain hurt. Plus I know I'd have a stack of trial & error cylinders sitting in a can, before I got one right. LOL! I know how to use a couple of those machines, but I've only done basic stuff with them. This stuff looks fun! Great thread & I'm looking forward to the next installment.
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Post by Lee Martin on May 28, 2009 12:40:59 GMT -5
Ahhh, whe nI worked in a machine shop I had to lug those things around from mill to mill They're not light, are they? -Lee www.singleactions.com
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Post by nobearsyet on May 28, 2009 13:04:54 GMT -5
Not in the least bit, I wish the guy that owned the shop would have bought one for eac hmill and just slid them to the end whe nthey weren't in use.
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shorty500
.327 Meteor
too many dirty harry movies created me!
Posts: 911
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Post by shorty500 on May 28, 2009 19:18:00 GMT -5
what's really a heck of a note is that let's say i was able to "BORROW" the FeatureCam program & 4axis machining center at work for a personnal project and spit out a nice completed finished cylinder, LOL, guess what guys it wouldn't be as good as a linebored cylinder! if did that might as well keep the factory original.
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Post by Lee Martin on May 29, 2009 8:51:32 GMT -5
Line-boring or line-indexing is definitely the way to go. I use the latter because I feel it's more sound to bore the cylinder while locked in an indexing head. Nothing against jigs that hold the entire gun as the pilots are drilled.....just that I've never been convinced it's as rigid as a Hartford Super Spacer. The key is to use oversized bolts that tightly fit the frame and cut the bolt stops to match. As long as you have no side movement of the cylinder when in battery, marking the centerlines using our method is every bit as good as traditional line-boring (and for the reasons noted above, I believe it's an even better technique). -Lee www.singleactions.com
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Post by nobearsyet on May 29, 2009 11:15:57 GMT -5
I see, how about tutorial (with numbers) for us guys that can't quite figure it all out, for that matter is this something that could reasonably be done by the at home smith using things like a cross slide table on the old drill press?
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shorty500
.327 Meteor
too many dirty harry movies created me!
Posts: 911
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Post by shorty500 on May 29, 2009 16:54:10 GMT -5
big heavy mills and spacers are the only way to go when making cylinders. Lee's method is great way. mine is a bit more troublesome to set-up but once i have centered up on the hole in the frame all i have to do is back the hammer to index to the next hole. i made up a neat little rig to keep air from the compressor blowing my chips out in such a manner to keep them from getting into the lockwork, not foolproof but it makes life easier. and i hear that some gunsmiths ream through the bushing to establish the pilot diameter for chambering reamers,no doubt that works extremely well with the blank cylinders from Borchardt but even though the reamer is supportted by the bushing i ain't crazy about the idea because the mass produced cylinders from them or factory could be a touch off and even with the bushing reamer will want to foollow that existing hole! butwhatever method of lineboring or line indexing is used( if done properly) will beat the BEST mass produced cylinders even when the hih volume is done start to finish on a 4axis machine. but i will give S&W and Ruger both credit- the recent guns( when properly dimensioned & fitted) do shoot extremely well but in the end fitting, lack of fitting or tolerance stack and hinder them.
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shorty500
.327 Meteor
too many dirty harry movies created me!
Posts: 911
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Post by shorty500 on May 29, 2009 16:56:30 GMT -5
sorry my typing stinks sometimes!!!! meant to type----- tolerance stack up can hinder them!!!!!
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Post by nobearsyet on May 30, 2009 9:40:07 GMT -5
I was actually contemplating a Borchardt cylinder for a project tat is still way down the road
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Post by Lee Martin on Jun 16, 2009 21:46:06 GMT -5
I finally got down to my dad’s shop and worked some more on my 44 cylinder. Sorry this project is going so slow, but I’m been pretty busy of late. Anyways, here are some more progress photos: Bridgeport #2 with Hartford Super Spacer is used to bore the cylinder: -Lee www.singleactions.com
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Post by Lee Martin on Jun 16, 2009 21:48:56 GMT -5
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Post by Lee Martin on Jun 16, 2009 21:49:23 GMT -5
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Post by Lee Martin on Jun 16, 2009 21:49:58 GMT -5
Pilot holes are then drilled to 0.410” Now my 44 reamer is set-up for rifle (pilot = 0.421”). As such, the throats are then reamed to 0.421”: Next update will involve flipping the cylinder over and reaming the chambers. Final throats will be reamed to 0.428” then honed to 0.430”. Stay tuned….more to come. -Lee www.singleactions.com
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Post by nobearsyet on Jun 17, 2009 3:28:13 GMT -5
Good to see how this goes together when one is getting read yto embark on a couple of projects of their own
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Post by vonfatman on Jun 17, 2009 9:21:40 GMT -5
Sir, I agree with many others...a wonderful thread. Very informative and interesting. Thanks for making time to share your unique skills.
Bob
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