Dry lube?
On Sun, 29 Apr 2018 16:03:10 -0700, sms
wrote: On 4/29/2018 10:41 AM, Jeff Liebermann wrote: On Sun, 29 Apr 2018 09:24:45 -0700, sms wrote: 1. Ensure that the lubricant doesn't just remain on the surface but penetrates into the pins and rollers. It needs to be thin to do this. Again, oil does not penetrate steel unless it is porous. Please adjust your terminology accordingly. I suspect that you're not a lot of fun at parties. Fine, "it penetrates into the spaces between the pins and rollers." You must be talking about some sort of archaic chain as modern bicycle chains have no contact between the pins and the rollers. http://www.sheldonbrown.com/chains.html -- Cheers, John B. |
Dry lube?
On Sun, 29 Apr 2018 18:20:29 -0700, Jeff Liebermann
wrote: On Sun, 29 Apr 2018 16:01:33 -0700, sms wrote: On 4/29/2018 10:03 AM, Jeff Liebermann wrote: snip Sounds great, except when I tried various home brew solvent carriers last summer, it didn't quite work. Of course you also believed that I could glue two halves of a broken brake lever together. Nice change of subject. However, I'm bored so I'll lecture you on the fine art of electrolysis generated hydrogen torch welding, also known as an "oxygen hydrogen water welder": https://www.ebay.com/sch/i.html?_nkw=oxygen+hydrogen+water+welder It use electricity to break down water into hydrogen and oxygen, feed them to an oxygen-hydrogen torch or "HHO torch": https://www.ebay.com/sch/i.html?_nkw=hho+torch which is then used to weld the aluminum. This is mostly about oxy-fuel welding, but oxy-hydrogen is similar: https://www.tinmantech.com/education/articles/aluminum-welding-using-oxy-fuel-welding-on-aircraft-aluminum-sheet.php (4 parts). I don't currently own one of these welders. I practice with a friends water welder, currently learning to butt weld two pieces of 0.040" aluminum sheet metal together. At this point, I'm not very skilled at this style of welding, but am getting better. Had you elected not to throw away the broken brake lever, and sent it to me, I'm quite sure I could have welded it back together or had my friend do the work. Off topic question here. How much heat do these water based systems develop. You talk about welding .040" aluminum but could the same torch be used as a replacement for a small oxy-acetylene system for general use. Welding, brazing, etc? Sometimes homebrew solutions are just not going to work and are more costly then purchasing a mass produced product specifically designed for a particular use. I see that you only favor ecologically correct solutions when they are economically advantageous. Well, that's a common attitude today and probably will be for at least few more decades. Eventually, aluminum prices will rise and you might find repair more appealing than replace. Meanwhile, I continue to repair things at a loss for the simple pleasure of keeping them out of the municipal dump. https://www.ifixit.com/Manifesto In the unlikely event that you find my point of view compelling, start he https://ifixit.org/pledge -- Cheers, John B. |
Dry lube?
On Sun, 29 Apr 2018 16:03:10 -0700, sms
wrote: On 4/29/2018 10:41 AM, Jeff Liebermann wrote: On Sun, 29 Apr 2018 09:24:45 -0700, sms wrote: 1. Ensure that the lubricant doesn't just remain on the surface but penetrates into the pins and rollers. It needs to be thin to do this. Again, oil does not penetrate steel unless it is porous. Please adjust your terminology accordingly. I suspect that you're not a lot of fun at parties. Probably true, but difficult to tell because nobody invites me to parties any more. I probably wouldn't go because I usually spend the evening cornered by people asking questions on how to fix their computahs, cars, appliances, etc. Fine, "it penetrates into the spaces between the pins and rollers." Thank you. For a fleeting moment, I was wondering if your bicycle chain was made from metal foam: https://www.google.com/search?tbm=isch&q=metal+foam https://en.wikipedia.org/wiki/Metal_foam Incidentally, if you want a better passive cooled heat sink, try copper foam: http://www.versarien-technologies.co.uk https://www.mouser.com/new/versarien-technologies/versarien-lph-heat-sink/ -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Dry lube?
On Mon, 30 Apr 2018 09:00:02 +0700, John B.
wrote: How much heat do these water based systems develop. You talk about welding .040" aluminum but could the same torch be used as a replacement for a small oxy-acetylene system for general use. Welding, brazing, etc? Disclaimer: I are not an expert on hydrogen welding and have limited experience in using a hydrogen-oxygen torch. No, or at least not for welding anything big. The typical electrolysis generator does not have the capacity to produce enough gas volume to maintain the required flow rate. Worse, the theoretical hydrogen:oxygen 2:1 ratio doesn't quite work because the torch works best at 4:1. It's difficult to store enough gases for instant availability because the hydrogen leaks rather badly and the oxygen rots everything it touches. At best, it's good for running the tiny torches that I mentioned: https://www.ebay.com/sch/i.html?_nkw=hho+torch Also, you can get more heat out of an acetylene oxygen mix than a hydrogen and oxygen mix. That's beneficial when working with thin aluminum and a tiny torch because it reduces the heat affected zone. I've tried aluminum welding with my big oxy-acetylene torch on thick aluminum cross sections. Thick pieces work, but I often destroy anything that looks like aluminum sheet metal. I usually blow a hole at the beginning of the bead, or produce something useless that looks like corrugated metal roofing. Learn by Destroying(tm). I forgot to mumble that you need to add NaOH (sodium hydroxide or lye) to the (demineralized) water to make it sufficiently conductive so that the electrolysis works. Also, a backfire arrestor is probably a good idea. HHO Welder video worth watching: https://www.youtube.com/watch?v=eGz5X1hB3Nw (5:52) If you want to go cheap with a very fine torch tip (using a syringe tip), there's the ER50 Electrolyzer for about $400. http://www.eagle-research.com/cms/store/browns-gas/er50-assembled-mini-browns-gas-electrolyzer Video on how it's used: https://www.youtube.com/watch?v=VwPZoowQ-Rs Small backfire at 28:30. Note that the maximum indicated torch pressure on the gauge is 3 psi. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Dry lube?
On 30/04/18 04:00, John B. wrote:
On Sun, 29 Apr 2018 16:03:10 -0700, sms wrote: On 4/29/2018 10:41 AM, Jeff Liebermann wrote: On Sun, 29 Apr 2018 09:24:45 -0700, sms wrote: 1. Ensure that the lubricant doesn't just remain on the surface but penetrates into the pins and rollers. It needs to be thin to do this. Again, oil does not penetrate steel unless it is porous. Please adjust your terminology accordingly. I suspect that you're not a lot of fun at parties. Fine, "it penetrates into the spaces between the pins and rollers." You must be talking about some sort of archaic chain as modern bicycle chains have no contact between the pins and the rollers. http://www.sheldonbrown.com/chains.html I thought that was the bit that wore? |
Dry lube?
On Sun, 29 Apr 2018 20:47:50 -0700, Jeff Liebermann
wrote: On Mon, 30 Apr 2018 09:00:02 +0700, John B. wrote: How much heat do these water based systems develop. You talk about welding .040" aluminum but could the same torch be used as a replacement for a small oxy-acetylene system for general use. Welding, brazing, etc? Disclaimer: I are not an expert on hydrogen welding and have limited experience in using a hydrogen-oxygen torch. No, or at least not for welding anything big. The typical electrolysis generator does not have the capacity to produce enough gas volume to maintain the required flow rate. Worse, the theoretical hydrogen:oxygen 2:1 ratio doesn't quite work because the torch works best at 4:1. It's difficult to store enough gases for instant availability because the hydrogen leaks rather badly and the oxygen rots everything it touches. At best, it's good for running the tiny torches that I mentioned: https://www.ebay.com/sch/i.html?_nkw=hho+torch Also, you can get more heat out of an acetylene oxygen mix than a hydrogen and oxygen mix. That's beneficial when working with thin aluminum and a tiny torch because it reduces the heat affected zone. I've tried aluminum welding with my big oxy-acetylene torch on thick aluminum cross sections. Thick pieces work, but I often destroy anything that looks like aluminum sheet metal. I usually blow a hole at the beginning of the bead, or produce something useless that looks like corrugated metal roofing. Learn by Destroying(tm). I forgot to mumble that you need to add NaOH (sodium hydroxide or lye) to the (demineralized) water to make it sufficiently conductive so that the electrolysis works. Also, a backfire arrestor is probably a good idea. My thoughts were not to have to be forever messing with rental tanks. I get half way through a job and the oxygen runs out or the fuel gas - I am using LPG recently - expires and one has to run out and get some more. When we were in Phuket that was nearly an 80 km round trip :-( Gas welding aluminum is pretty much a lost art these days with the availability of cheap TIG welding sets. I certified gas welding aluminum in 1950 and never gas welded aluminum again :-) I seem to remember that we gas welded aluminum using a flux which I'm not even sure one can buy these days. HHO Welder video worth watching: https://www.youtube.com/watch?v=eGz5X1hB3Nw (5:52) If you want to go cheap with a very fine torch tip (using a syringe tip), there's the ER50 Electrolyzer for about $400. http://www.eagle-research.com/cms/store/browns-gas/er50-assembled-mini-browns-gas-electrolyzer Video on how it's used: https://www.youtube.com/watch?v=VwPZoowQ-Rs Small backfire at 28:30. Note that the maximum indicated torch pressure on the gauge is 3 psi. -- Cheers, John B. |
Dry lube?
On Mon, 30 Apr 2018 07:00:31 +0200, Tosspot
wrote: On 30/04/18 04:00, John B. wrote: On Sun, 29 Apr 2018 16:03:10 -0700, sms wrote: On 4/29/2018 10:41 AM, Jeff Liebermann wrote: On Sun, 29 Apr 2018 09:24:45 -0700, sms wrote: 1. Ensure that the lubricant doesn't just remain on the surface but penetrates into the pins and rollers. It needs to be thin to do this. Again, oil does not penetrate steel unless it is porous. Please adjust your terminology accordingly. I suspect that you're not a lot of fun at parties. Fine, "it penetrates into the spaces between the pins and rollers." You must be talking about some sort of archaic chain as modern bicycle chains have no contact between the pins and the rollers. http://www.sheldonbrown.com/chains.html I thought that was the bit that wore? The pins may wear but certainly not because they are in contact with the rollers :-) -- Cheers, John B. |
Dry lube?
On Mon, 30 Apr 2018 15:19:37 +0700, John B.
wrote: My thoughts were not to have to be forever messing with rental tanks. I get half way through a job and the oxygen runs out or the fuel gas - I am using LPG recently - expires and one has to run out and get some more. When we were in Phuket that was nearly an 80 km round trip :-( Water gas welding isn't going to substitute for bottled gases. What can you do when the gas pressure is under 2 PSI? You can run a tiny syringe welding torch or maybe a plastic welder, but that's about it. Gas welding aluminum is pretty much a lost art these days with the availability of cheap TIG welding sets. I certified gas welding aluminum in 1950 and never gas welded aluminum again :-) I seem to remember that we gas welded aluminum using a flux which I'm not even sure one can buy these days. Can you butt weld 0.040 aluminum sheet metal with a TIG welder? If you don't want to drag around a TIG or MIG shielding gas tank (with the correct mix), maybe switch to a MIG welder with flux core wire? The welds aren't as nice as with gas shielding, but good enough. There's also some slag and more splatter to deal with. For cutting, a plasma cutter requires on tank of gas. Not a big improvement over 2 tanks for conventional oxy-acetylene cutting, but might be worthwhile. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
Dry lube?
On Mon, 30 Apr 2018 19:13:16 -0700, Jeff Liebermann
wrote: On Mon, 30 Apr 2018 15:19:37 +0700, John B. wrote: My thoughts were not to have to be forever messing with rental tanks. I get half way through a job and the oxygen runs out or the fuel gas - I am using LPG recently - expires and one has to run out and get some more. When we were in Phuket that was nearly an 80 km round trip :-( Water gas welding isn't going to substitute for bottled gases. What can you do when the gas pressure is under 2 PSI? You can run a tiny syringe welding torch or maybe a plastic welder, but that's about it. Gas welding aluminum is pretty much a lost art these days with the availability of cheap TIG welding sets. I certified gas welding aluminum in 1950 and never gas welded aluminum again :-) I seem to remember that we gas welded aluminum using a flux which I'm not even sure one can buy these days. Can you butt weld 0.040 aluminum sheet metal with a TIG welder? From the welder's point of view, certainly. However, assuming a one pass weld the amperage of the welding set is important. If you don't want to drag around a TIG or MIG shielding gas tank (with the correct mix), maybe switch to a MIG welder with flux core wire? The welds aren't as nice as with gas shielding, but good enough. There's also some slag and more splatter to deal with. I've never used a MIG welder. Seen them but when I was welding they were not common but one of the guys that worked for me went off to northern Ohio, someplace, and got a job MIG welding. He said the most important tool was a large set of side cutters to cut off the wire after you buzzed about a foot out of the torch and got it stuck to the weld :-) For cutting, a plasma cutter requires on tank of gas. Not a big improvement over 2 tanks for conventional oxy-acetylene cutting, but might be worthwhile. I had a plasma cutter but never got very proficient with it. I cold cut but the cut ends were pretty rough and needed a lot of cleaning up with a hand grinder so I bought some 1mm disks and just used the hand grinder as a cutoff machine. -- Cheers, John B. |
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