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Post by Lee Martin on Sept 24, 2012 11:38:20 GMT -5
At the airport traveling to Arkansas for work. Should have an update posted by tonight. -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Post by bigboredad on Sept 24, 2012 15:02:55 GMT -5
I think Fermin said it best Very cool. The only way it could be more cool is if I was there to get in the way and see it happen in person.
I'm just guessing but you and your dad seem to get along better than most of the father and son build it teams on tv. I wish my dad and I had your skills
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Post by Lee Martin on Sept 25, 2012 13:41:06 GMT -5
My dad and I do get along very well. We've been close all my life and he's the reason I got sucked into guns. And I should have updates for this thread posted by tonight. -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Post by bigboredad on Sept 25, 2012 21:53:58 GMT -5
My dad and I do get along very well. We've been close all my life and he's the reason I got sucked into guns. And I should have updates for this thread posted by tonight. -Lee www.singleactions.com"Building carpal tunnel one round at a time" that's cool that you are close to your dad. My dad and I are still pretty close after 44 years I'm not sure how I'd get along with out him. I am looking forward to the updates. This a super cool idea you guys had |
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Post by Lee Martin on Sept 26, 2012 11:43:25 GMT -5
OK, more updates. This past weekend we got side-tracked with the cylinder again. When we fit the cylinder to the frame there was absolutely no end-shake. Then we torqued the barrel in and guess what? We got 0.0015” or so worth of play. Now that’s not material but we aim for extremely rigid fit. We scratched our heads a bit because we’ve never experienced this before. It turns out the frame likely was compressed and machine hardened when we milled the window. Then when we fit the barrel it stress relieved the frame (ie, it sprung back by 0.0015” or so). The solution? We decided to bush the cylinder.  Boring the old gas ring:   Lathing the bushing:   I should add that we'll need to repolish the front of the cylinder. 0.0005 so should clean it up so there'll be no impact to the gap. -Lee www.singleactions.com“Building carpal tunnel one round at a time” |
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Post by Lee Martin on Sept 26, 2012 11:50:24 GMT -5
Measuring the bushing depth:  Machining the bushing:  We also added the band to the barrel:   -Lee www.singleactions.com“Building carpal tunnel one round at a time” |
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Post by Lee Martin on Sept 26, 2012 11:52:01 GMT -5
Drilling the center hole on the bushing:   Final reaming for the basepin:  -Lee www.singleactions.com“Building carpal tunnel one round at a time” |
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Post by Lee Martin on Sept 26, 2012 11:54:07 GMT -5
We then moved to a Six Twelve surface grinder for final length. These machines will hold tolerance to 0.0001” so you can really approximate fit to the frame:    -Lee www.singleactions.com“Building carpal tunnel one round at a time” |
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Post by Lee Martin on Sept 26, 2012 12:11:00 GMT -5
We also started working on the front sight. Sawing the band off the No. 1 assembly  Milling the base:   Shortening the ramp length:  Milling to dovetail:  -Lee www.singleactions.com“Building carpal tunnel one round at a time” |
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Post by Lee Martin on Sept 26, 2012 12:23:36 GMT -5
I should add that when we ground the cylinder bushing we went 0.0005" at a time. Basically we fit it so it would seat but exhibit a slight amount of drag when cycling. Then we took another 0.0002". We achieved extremely tight fit on this one with no impact to function. -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Post by whitworth on Sept 26, 2012 12:45:06 GMT -5
Great! Excellent!
We'll be making noise soon! Nice work, Lee!
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Post by Lee Martin on Sept 26, 2012 13:20:49 GMT -5
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Post by Lee Martin on Sept 26, 2012 13:24:25 GMT -5
Hardening the cylinder bushing: Annealing the cylinder bushing: -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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Post by Lee Martin on Sept 26, 2012 13:26:45 GMT -5
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Post by Lee Martin on Sept 26, 2012 14:11:11 GMT -5
A couple of photos of the front sight. We just started to shape it so there's a lot of milling left to do:   It's pretty rough right now but hopefully we'll make progress this weekend. -Lee www.singleactions.com"Building carpal tunnel one round at a time" |
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