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Posted: 7/7/2015 11:24:20 AM EDT
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So I'm about to start buying things for my first NFA, which is also my first can, and will be a form 1.
I had been thinking about getting items from SD tactical and then just punching the hole when the stamp comes back, but seeing the $75 price tag on the titanium tube just pissed me off. Google a bit and I find out the same tube without threads can be bought for $48/12" they do custom sizes so I can get better dimensions if needed, but if not, that 12" tube would cost less and make me a 7" tube and a shorter 5" for another build down the line. LGS has a lathe and figured I would ask him if he would give me some lathe time or just thread the tubing for me for some cash or beer. But that leads me to my issue. If I go this route, I'll probably still just buy end caps from SD since I don't have the resources to produce them. So I need to know what to thread my tubing. The 1.31 x 0.082 tube is threaded to be a direct fit to the Gentech LID. Anyone know what that threading is? Am I being stupid? Should I just throw the money at SD for the tube? Price per inch SD is almost $6 an inch more than buying the tube myself. |
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What does shop time run $60-$100+ an hour? If you can get it for free/beers then by all means, go that route.
With the equipment I have, I can assuredly say that I will NEVER build another can with Ti internals and I will happily buy solvent trap parts that are cut and threaded. |
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Quoted:
What does shop time run $60-$100+ an hour? If you can get it for free/beers then by all means, go that route. With the equipment I have, I can assuredly say that I will NEVER build another can with Ti internals and I will happily buy solvent trap parts that are cut and threaded. What does it honestly take to thread a titanium tube? I'm not much of a machinast but I just assumed it would be a 30 min job |
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If your LGS does agree to thread a solvent trap tube, the cost of threading and/or cost of case/beer will put you close to the cost of SDtactical tube anyway, not to mention if the LGS has to purchase any tooling they might need to cut titanium.
What size spindle bore does the LGS have? Do they have a steady rest for the lathe? Coolant system for cutting titanium? IMO, if you choose to have the LGS or yourself cut threads, buy the end caps first, so when you cut the threads in the tube, you can test fit the caps until you reach the best fit. |
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Quoted:
If your LGS does agree to thread a solvent trap tube, the cost of threading and/or cost of case/beer will put you close to the cost of SDtactical tube anyway, not to mention if the LGS has to purchase any tooling they might need to cut titanium. What size spindle bore does the LGS have? Do they have a steady rest for the lathe? Coolant system for cutting titanium? IMO, if you choose to have the LGS or yourself cut threads, buy the end caps first, so when you cut the threads in the tube, you can test fit the caps until you reach the best fit. Hes a full gun shop who really sells guns on the side. I'll have to talk to him about tooling I know he does have coolant on it. Yes pretty cool and I don't think he would have an issue with threading it, but we will see. Even if the cost is a wash, I get an extra 5" tube to make another suppressor out of, and if I thread it at the same time it will save on setup Just my line of thinking. |
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If you do not do metal work, Ti is NOT the first material you want to start with... You will screw up a bit in seconds if you don't know what you are doing. If you are doing this just because of the price of the tube I think it is a bad move. Noted. I'll have him cut it and use it as an observation and learning experience. |
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Quoted:
Hes a full gun shop who really sells guns on the side. I'll have to talk to him about tooling I know he does have coolant on it. Yes pretty cool and I don't think he would have an issue with threading it, but we will see. Even if the cost is a wash, I get an extra 5" tube to make another suppressor out of, and if I thread it at the same time it will save on setup Just my line of thinking. Quoted:
Quoted:
If your LGS does agree to thread a solvent trap tube, the cost of threading and/or cost of case/beer will put you close to the cost of SDtactical tube anyway, not to mention if the LGS has to purchase any tooling they might need to cut titanium. What size spindle bore does the LGS have? Do they have a steady rest for the lathe? Coolant system for cutting titanium? IMO, if you choose to have the LGS or yourself cut threads, buy the end caps first, so when you cut the threads in the tube, you can test fit the caps until you reach the best fit. Hes a full gun shop who really sells guns on the side. I'll have to talk to him about tooling I know he does have coolant on it. Yes pretty cool and I don't think he would have an issue with threading it, but we will see. Even if the cost is a wash, I get an extra 5" tube to make another suppressor out of, and if I thread it at the same time it will save on setup Just my line of thinking. As some one who is a machinist and has access to the equipment, it's less of a headache to just buy the trap. Your 30 minutes of threading will turn into a whole afternoon of re-engineering everything to get it just the way you want it. If I were going to set up and ID thread a tube, face to length, and relieve for an oring, (which is what you will get with an SD tube) I would allow at least 2 hours. It really all depends what your time is worth. Also, if you are able to face and ID thread the tube, you should be able to make your end cap also. Depending on what the guy providing access for you has for gauges, you may need to make a thread gauge before you can thread the tube. ETA: You may also want to double check what tube you are looking at. A little quick math puts the minor diameter for 1.18-20 at 1.13". A 1.31 tube with a .082 wall puts your tubing ID at 1.146". |
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Quoted:
As some one who is a machinist and has access to the equipment, it's less of a headache to just buy the trap. Your 30 minutes of threading will turn into a whole afternoon of re-engineering everything to get it just the way you want it. If I were going to set up and ID thread a tube, face to length, and relieve for an oring, (which is what you will get with an SD tube) I would allow at least 2 hours. It really all depends what your time is worth. Also, if you are able to face and ID thread the tube, you should be able to make your end cap also. Depending on what the guy providing access for you has for gauges, you may need to make a thread gauge before you can thread the tube. ETA: You may also want to double check what tube you are looking at. A little quick math puts the minor diameter for 1.18-20 at 1.13". A 1.31 tube with a .082 wall puts your tubing ID at 1.146". Quoted:
Quoted:
Quoted:
If your LGS does agree to thread a solvent trap tube, the cost of threading and/or cost of case/beer will put you close to the cost of SDtactical tube anyway, not to mention if the LGS has to purchase any tooling they might need to cut titanium. What size spindle bore does the LGS have? Do they have a steady rest for the lathe? Coolant system for cutting titanium? IMO, if you choose to have the LGS or yourself cut threads, buy the end caps first, so when you cut the threads in the tube, you can test fit the caps until you reach the best fit. Hes a full gun shop who really sells guns on the side. I'll have to talk to him about tooling I know he does have coolant on it. Yes pretty cool and I don't think he would have an issue with threading it, but we will see. Even if the cost is a wash, I get an extra 5" tube to make another suppressor out of, and if I thread it at the same time it will save on setup Just my line of thinking. As some one who is a machinist and has access to the equipment, it's less of a headache to just buy the trap. Your 30 minutes of threading will turn into a whole afternoon of re-engineering everything to get it just the way you want it. If I were going to set up and ID thread a tube, face to length, and relieve for an oring, (which is what you will get with an SD tube) I would allow at least 2 hours. It really all depends what your time is worth. Also, if you are able to face and ID thread the tube, you should be able to make your end cap also. Depending on what the guy providing access for you has for gauges, you may need to make a thread gauge before you can thread the tube. ETA: You may also want to double check what tube you are looking at. A little quick math puts the minor diameter for 1.18-20 at 1.13". A 1.31 tube with a .082 wall puts your tubing ID at 1.146". Good to know. I just found a tube that matched what SD had for dimensions. I guess in my mind measurements are measurements, but if it can lead to be that big of a pain maybe I'll just buy theirs. |
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25 to me is not worth the trouble of trying to find a match. SD tubs and stuff are great and fit well together.
I also like being able to buy everything (including engraving the tube@ 25$) at one place Tube engraving at 25 offsets tube price and no sending it back out to be done. |
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