zarguy
fully equipped rock polisher
Cedar City, Utah - rockhound heaven!
Member since December 2005
Posts: 1,791
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Post by zarguy on Nov 17, 2017 17:44:35 GMT -5
I'm trying to identify the threads on a Presto-Lite torch handle/hose so I can buy fittings to connect it and a Smith Little torch to a Y adapter on my Acetylene regulator. I know it's Left Hand. Someone said 3/8"-24, Someone else said 1/4"-24. I wish I could just measure the thread & know what it's called, but plumbing/welding threads are often designated, not by the actual size, but by the inside diameter of the pipe that it fits! Lynn
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Post by vegasjames on Nov 17, 2017 18:08:13 GMT -5
Take it to a hardware store and see what nut or bolt fits. That will tell you the size and the thread.
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zarguy
fully equipped rock polisher
Cedar City, Utah - rockhound heaven!
Member since December 2005
Posts: 1,791
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Post by zarguy on Nov 17, 2017 22:27:39 GMT -5
Take it to a hardware store and see what nut or bolt fits. That will tell you the size and the thread. It doesn't work that way. The name of the connector isn't based on its actual size, but on the inside diameter of the pipe that it connects to. I need to buy an obscure adapter by its name, not actual measurement. It will be connecting 2 different threads. They won't have it in a local store, so I'll be buying it online. Lynn
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Post by youp50 on Nov 18, 2017 7:32:06 GMT -5
Head to a welding gas supply store. I believe they are straight pipe threads, likely 1/4 inch. There is a lot to risk with leaking acetylene. The seal is made on an internal o ring. The hose looks ripe, take it with you and have them cut it back and crimp on a new fitting. Your local store should be able to order the wye for you.
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Post by TheRock on Nov 18, 2017 18:26:21 GMT -5
Head to a welding gas supply store. I believe they are straight pipe threads, likely 1/4 inch. There is a lot to risk with leaking acetylene. The seal is made on an internal o ring. The hose looks ripe, take it with you and have them cut it back and crimp on a new fitting. Your local store should be able to order the wye for you. I'm with youp50 on this, that Hose looks like it has a case of TERMITES and Id be replacing it, and I would definitely be going to a welding store like Air Gas, Prax Air or somewhere like that. I have that same torch with a turbo tip on it with a B tank, what size tip do you use on it, and for what purpose? by the way it looks 1/4" to me also.
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zarguy
fully equipped rock polisher
Cedar City, Utah - rockhound heaven!
Member since December 2005
Posts: 1,791
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Post by zarguy on Nov 18, 2017 20:29:38 GMT -5
I have an acetylene B tank with the type of regulator typically used with a Tubotorch, PrestoLite, Uniweld, etc. acetylene/air torch.
The regulator has a male thread coming out of it that's the same thread I showed in the picture.
I want to adapt that to a Smith Little torch which has 9/16 18 LH female, so I need an adapter between those 2 threads.
I live in a small town. There are welding stores an hour away. Closed on Saturday, which is probably when I'd get a chance to go. Since I will probably buy it online, I need to know the correct designation since I won't be able to try it out in the store or ask a salesperson. Probably most salespeople know about welding, not jewelry soldering.
I'm bet Radnor makes an adapter.
And what about the oxygen you ask? I acquired a medical oxygen concentrator to supply the oxy. There are lots of YouTube videos on the subject. Rio Grande even sells a system based on a medical oxy concentrator, although it's got disposable propane bottles instead of acetylene. Lynn
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minerken
Cave Dweller
Member since August 2013
Posts: 466
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Post by minerken on Nov 19, 2017 6:38:31 GMT -5
I'm not sure if I'm getting your question right. All threads as far as I know are designated by the diameter of the part receiving the thread and the pitch of the thread i.e. inside diameter or female and threads per inch(pitch) or male (outside diameter) and pitch. then determine the 2 standards i.e. NPT(C or F)(national pipe thread coarse or fine) or NC or NF(national fine or National Coarse). NPT are a tapered thread and NC/NF are straight. here is a gauge to determine pitch www.amazon.com/Performance-Tool-W8655-Thread-Pitch/dp/B075ZKWH3F/ref=sr_1_12?ie=UTF8&qid=1511089058&sr=8-12&keywords=threading+gaugeIf you are looking for a connector between two parts with female connections it would be for example NPTC 1/4"-20TPI female to female, or male to female etc. If the two ends are different diameters then you will need a reducer from whatever to whatever ie 1/2-20 to 1/4-20. Of coarse it will have to be designated left hand also. If metric well same idea except mm instead of inches.
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Post by TheRock on Nov 20, 2017 2:31:19 GMT -5
I have an acetylene B tank with the type of regulator typically used with a Tubotorch, PrestoLite, Uniweld, etc. acetylene/air torch. The regulator has a male thread coming out of it that's the same thread I showed in the picture. I want to adapt that to a Smith Little torch which has 9/16 18 LH female, so I need an adapter between those 2 threads. I live in a small town. There are welding stores an hour away. Closed on Saturday, which is probably when I'd get a chance to go. Since I will probably buy it online, I need to know the correct designation since I won't be able to try it out in the store or ask a salesperson. Probably most salespeople know about welding, not jewelry soldering. I'm bet Radnor makes an adapter. And what about the oxygen you ask? I acquired a medical oxygen concentrator to supply the oxy. There are lots of YouTube videos on the subject. Rio Grande even sells a system based on a medical oxy concentrator, although it's got disposable propane bottles instead of acetylene. Lynn zarguyLynn so what you are trying to do is hook up a tee or Y right off the B tank regulator then hook your presto-lite torch hose to one side and then your Little Torch Hose to the other side so you can use either as needed is that correct? You perked my interest in this because I have all the same equipment. If this is correct let me know and I will go to my local welding shop and get the skinny on what the parts are. ~Duke
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zarguy
fully equipped rock polisher
Cedar City, Utah - rockhound heaven!
Member since December 2005
Posts: 1,791
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Post by zarguy on Nov 20, 2017 12:39:11 GMT -5
I have an acetylene B tank with the type of regulator typically used with a Tubotorch, PrestoLite, Uniweld, etc. acetylene/air torch. The regulator has a male thread coming out of it that's the same thread I showed in the picture. I want to adapt that to a Smith Little torch which has 9/16 18 LH female, so I need an adapter between those 2 threads. I live in a small town. There are welding stores an hour away. Closed on Saturday, which is probably when I'd get a chance to go. Since I will probably buy it online, I need to know the correct designation since I won't be able to try it out in the store or ask a salesperson. Probably most salespeople know about welding, not jewelry soldering. I'm bet Radnor makes an adapter. And what about the oxygen you ask? I acquired a medical oxygen concentrator to supply the oxy. There are lots of YouTube videos on the subject. Rio Grande even sells a system based on a medical oxy concentrator, although it's got disposable propane bottles instead of acetylene. Lynn zarguy Lynn so what you are trying to do is hook up a tee or Y right off the B tank regulator then hook your presto-lite torch hose to one side and then your Little Torch Hose to the other side so you can use either as needed is that correct? You perked my interest in this because I have all the same equipment. If this is correct let me know and I will go to my local welding shop and get the skinny on what the parts are. ~Duke TheRock - Duke, I was going to do that, but I've acquired a second Acetylene B tank. Now I can have one dedicated to my Turbo torch & the other dedicated to my Smith Little torch. It will be easier to manage always having a full tank now that I have 2. They charge a lot more for acetylene at the car parts store in my town than the welding supply an hour away. So I just need an adapter to go between the threaded nipple from the regulator to the hose on my Smith Little torch. The male thread coming out of the regulator is the same as the thread on the Turbo torch valve in the photo. The female thread of the Smith Little torch is 9/16 18 LH. Lynn
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Post by TheRock on Nov 20, 2017 13:38:14 GMT -5
Well maybe Ill do the same thing. I have a B tank Ill use for the presto-lite setup and I have (2) MC acetylene and (2) R Oxygen's Ill use for the Little Torch Outfit. All my stuff (SMALL TOOLS) are in my cabinets I just hung in my new shop in the boxes yet. Looks like I may need to make a decision If I want to buy New oxy and Act regulators for my little torch instead of taking my HVAC Silver Brazing kit apart. Sounds like I may need the adapter you mentioned.
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minerken
Cave Dweller
Member since August 2013
Posts: 466
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Post by minerken on Nov 20, 2017 16:16:42 GMT -5
click to enlarge
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zarguy
fully equipped rock polisher
Cedar City, Utah - rockhound heaven!
Member since December 2005
Posts: 1,791
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Post by zarguy on Nov 20, 2017 16:41:11 GMT -5
minerken Thanks! It looks like 7919A57 (UNF female 3/8 24 LH to UNF male 9/16 18 LH) is the connector I'm looking for. From Airgas the Radnor version of the part is RAD64003981 $7.20. Lynn
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minerken
Cave Dweller
Member since August 2013
Posts: 466
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Post by minerken on Nov 20, 2017 16:56:11 GMT -5
Glade to help sorry if I may have confused the issue in the OP showing my age NC and NF have been replaced with UNF and UNC but for all practical purposes they are the same
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Post by TheRock on Nov 21, 2017 0:06:14 GMT -5
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