awesome results ! i guess the next challenge would be to make a new main tube for it to handle even more pressure.. Id be curious to see the numbers on bulk co2 also.. nice job
Id be curious to see the numbers on bulk co2 also.. nice job
Quote from: Rob M on July 25, 2019, 09:28:02 AMawesome results ! i guess the next challenge would be to make a new main tube for it to handle even more pressure.. Id be curious to see the numbers on bulk co2 also.. nice jobThanks. A new tube would make more sense than adding an extension tube onto the existing tube. For an extension there would have to be a lot of metal taking up space for the connection and at least 4 pins (haven't done math on it). I'm not even sure it could be done. I have safety concerns too a it opens up room for error and creating a powerful/deadly rocket... For a new tube the only issue is my lathe is 7×14 with a 22mm spindle bore. I think I'd be using my steady rest and a file or farm it out. That discussion however might be better for the machining forum.
one of these days a motivated guy with a cnc lathe will roll out a a new spindle upgrade for the 7 inch lathes.. the machines would be soo much better with a 1.0 inch spindle bore it would be crazy..The issue there is the new spindle would not only need new bearings , it would also need a new drivetrain and possibly new hi-low gears on most models.
Quote from: Rob M on July 26, 2019, 08:32:56 AMone of these days a motivated guy with a cnc lathe will roll out a a new spindle upgrade for the 7 inch lathes.. the machines would be soo much better with a 1.0 inch spindle bore it would be crazy..The issue there is the new spindle would not only need new bearings , it would also need a new drivetrain and possibly new hi-low gears on most models. Hmph. There's easier ways to turn a 1" tube then that in the 7" lathes.
still not as easy as having the spindle bore to do it though..
Quote from: Rob M on July 26, 2019, 05:46:06 PMstill not as easy as having the spindle bore to do it though..Maybe not but the Pyramids were built without modern cranes.Necessity is the tool of invention! You can invent or pay through the nose to those that will.
Quote from: Jeff aka Privateer on July 26, 2019, 06:06:44 PMQuote from: Rob M hlink=topic=160665.msg155788683#msg155788683 date=1564173966still not as easy as having the spindle bore to do it though..Maybe not but the Pyramids were built without modern cranes.Necessity is the tool of invention! You can invent or pay through the nose to those that will. I thought you were talking about an add on device. I thought about securing the lathe and putting my drill press on the end where a future 1-1/8x.095 tube might be. I think minimal end work would be needed for a pinned fill cap.I'm still not finished with my 1" 45 cal barrel for the next project. It happens to be 1" at the breech and I was reducing the muzzle end to 3/4 using my steady rest. It was fluted and the bits don't like cutting over that. I still have some work left on it for both ends and starting on the breech side. Then I thought about making a barrel spinner somehow to finish it off. My lathe motor crapped out on me and I'm working with less RPMs on a replacement. Not ideal even for smaller diameter.
Quote from: Rob M hlink=topic=160665.msg155788683#msg155788683 date=1564173966still not as easy as having the spindle bore to do it though..Maybe not but the Pyramids were built without modern cranes.Necessity is the tool of invention! You can invent or pay through the nose to those that will.
referring to valve material ?? generally speaking people go overkill for valve materials .. aluminum 6061 or brass work fine for valve construction , they just need to be properly pinned like any other material. 7075 and 2024 are also good options.. As for the tube , that needs to be critiqued way more .. dom513, alum 2024 , 7075, a few variants of stainless , all depends on diameter and material , oring placement , thread depth , wall thickness at thread root. etc etc
Quote from: Rob M on July 27, 2019, 02:29:48 PMreferring to valve material ?? generally speaking people go overkill for valve materials .. aluminum 6061 or brass work fine for valve construction , they just need to be properly pinned like any other material. 7075 and 2024 are also good options.. As for the tube , that needs to be critiqued way more .. dom513, alum 2024 , 7075, a few variants of stainless , all depends on diameter and material , oring placement , thread depth , wall thickness at thread root. etc etcYeah I was thinking of valve and ends 15/16" diameter. I have 1" 6061 not being used that I can repurpose. I think I'd use caution using it for a threaded fill end though. Just me...Tube would be DOM 1026 - a513.Thanks