So a while back a guy brought some stuff into the field to sell. Among that stuff was an ION that we really had no interest in. Well a deal was made, and the ION was thrown in for the hell of it. Anyway, the ION got put aside to salvage for parts, but the barrel for whatever reason got mistreated. We were throwing it around and just generally beating the crap out of it (mainly the thread side for whatever reason). At one point the threaded side ended up in a vice to see how much effort it would take to crush. Needless to say, the threads were totally borked, and we hacksawed off what remained of them.
Then I got the brilliant(?) idea to take it home, stick it on the lathe, and cut it for Cocker threads. Why? Just to see if I could. Though my Chinese 8x16 lathe can in theory be setup to single point threads, I not ready to try that yet, so I got a 15/16-20 die (I also got a tap, as I figured I could maybe use both in the future, however it took about a month for them to get here). Mind you, I am no machinist (the real machinist on the forum will be justifiably laughing at my results), nor do I aspire to be one. Hell, I didn't even stay in a Holiday Inn Express last night (I'm too poor for that, it was an Econo Lodge beside the strip club).
I grabbed the Cocker thread specs from ZDSPB, and started cutting on the barrel yesterday. I got it down to ~0.930, and the stopped to go help someone with their plumbing. Today I finished it up, cutting the non-threaded portions down to ~0.865. I decided I wanted more threads than the drawing, just because I wasn't sure how good my threads would end up, so I figured more would be better. After getting that done, it was time to cut the threads, and that's where things went a bit south. While cutting the threads the barrel slipped in the chuck. The threads were a pain to cut, in part due to the size (largest I've ever cut), and I feel like the die was pretty aggressive and didn't have a lot of taper before I started cutting threads at full depth (this wasn't actually the die I'd ordered, it was the correct 15/16-20, but everything else was wrong). Anyway, cosmetic damage aside, I got the project finished, and here is the final result.
Bonus points if you read the subject in Jeremy Clarkson's voice.
Then I got the brilliant(?) idea to take it home, stick it on the lathe, and cut it for Cocker threads. Why? Just to see if I could. Though my Chinese 8x16 lathe can in theory be setup to single point threads, I not ready to try that yet, so I got a 15/16-20 die (I also got a tap, as I figured I could maybe use both in the future, however it took about a month for them to get here). Mind you, I am no machinist (the real machinist on the forum will be justifiably laughing at my results), nor do I aspire to be one. Hell, I didn't even stay in a Holiday Inn Express last night (I'm too poor for that, it was an Econo Lodge beside the strip club).
I grabbed the Cocker thread specs from ZDSPB, and started cutting on the barrel yesterday. I got it down to ~0.930, and the stopped to go help someone with their plumbing. Today I finished it up, cutting the non-threaded portions down to ~0.865. I decided I wanted more threads than the drawing, just because I wasn't sure how good my threads would end up, so I figured more would be better. After getting that done, it was time to cut the threads, and that's where things went a bit south. While cutting the threads the barrel slipped in the chuck. The threads were a pain to cut, in part due to the size (largest I've ever cut), and I feel like the die was pretty aggressive and didn't have a lot of taper before I started cutting threads at full depth (this wasn't actually the die I'd ordered, it was the correct 15/16-20, but everything else was wrong). Anyway, cosmetic damage aside, I got the project finished, and here is the final result.
Bonus points if you read the subject in Jeremy Clarkson's voice.
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