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| Petrol-proof O-rings |
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| S. Heslop:
I'm planning to build a peanut lighter with a friend's birthday coming up. I'm not the birthday gift giving type really, but the guy got me a Sega Game Gear (of all things) for mine and I want to return the favour. I built one almost immediately after I got my lathe, no idea where it is now, and it worked fairly well. One problem though was the tight fit with the sleeve part that slides out of the body, it needs to be tight so it doesn't fall out but it was difficult to remove and had a habit of ejecting all the fuel like a piston as you inserted it. I figured i'd try replace this with a relatively loose fit and an O-ring to give it a grip, but i'm unsure what kind of O-rings you need to buy that can resist petrol/ lighter fluid. Any help would be appreciated. |
| John Rudd:
I'd be inclined to search out suppliers and ask what the o ring material is and check for chemical compatibility |
| S. Heslop:
--- Quote from: John Rudd on November 26, 2014, 06:38:17 AM ---I'd be inclined to search out suppliers and ask what the o ring material is and check for chemical compatibility --- End quote --- I was hoping just to order then on somewhere like ebay. I can't imagine real suppliers being too excited if I phoned up and ordered 2 of them. Found the lighter though. If I had a milling machine I'd probably try milling a groove up the side of the sleeve part to prevent the pistoning. Or I could maybe drill a third hole in the top and run a small brass tube down to the bottom to let the air out. I still doubt my ability to get a good enough fit with the part to be tight but not too tight though, and an O ring seems like the easy way out. |
| Bluechip:
AFAIK 'Viton' rings are proof against petrol. No idea what lighter fuel is so .... ?? I get mine from Simply Bearings. Here is their site and if you poke the 'info' [ Chemical Resistance Table ] thing you'll get an overview of various o-ring materials. http://simplybearings.co.uk/shop/index.php?cPath=4501_4706 Dave |
| S. Heslop:
Thanks, I'll order some from simplybearings. I've bought from them in the past, and i've got some bearings I want to order from them too. |
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