O-Rings for 510 Drip Tips
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Thread: O-Rings for 510 Drip Tips

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    Default O-Rings for 510 Drip Tips

    Title says it all, preferably in bulk. Nothing more annoying than a slightly loose drip tip.

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    Your local home improvement store sells O-rings. Just take your drip tip in and find one that fits. You can usually buy them in bags of 10 or more, and you don't have to pay shipping.
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    Thank you both!

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    Quote Originally Posted by cskent View Post
    Your local home improvement store sells O-rings. Just take your drip tip in and find one that fits. You can usually buy them in bags of 10 or more, and you don't have to pay shipping.
    Yeah I figured, but I was concerned about knowing the right dimensions. The link to madvapes shows the dimensions though.
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    Funny you should post this. I just gave a friend of mine a couple of cartomizers I no longer use (his cartridge plus atomizer "system" wasn't working right, and I've never seen one that did), and his drip tip was a little loose on it. I said to him "hey, maybe you just need a new o-ring".

    Here's some info about o-rings; just about every one known to man, except maybe the ones on the shuttle booster rockets, is designated by a "Dash" number, from 001 to 475. A 001 has an inner diameter (ID) of 1/32" and an outer diameter (OD) of 3/32"; a dash 475 has an ID of 26" and an OD of 26.5". After that, you're on your own.

    So, ours would be closer to 001 than to 475. I'll measure mine with a micrometer and report back. Once you know the dash number for any O-ring, you can easily buy them in bulk, and stop being a slave to the insane markup you pay to a vendor or a hardware store.

    Example: a dash 10 is 1/4" id and 3/8" od, and 100 of them are $2.34 from Mcmaster-Carr.

    ***

    Holy crap, not a bad guess. Madvapes says the ID of a 510 drip tip O-ring is 6mm, and the OD is 9.4mm.

    6mm = .236", or pretty damn close to 1/4". 3/8" = 9.524mm, or pretty damn close to 9.4 mm. There isn't a dash size that comes closer to the size that madvapes says the o-rings are. The only metric size that comes close is a 6mm ID, 1.5mm thick, which would give an OD of 9mm. And good luck finding metric o-rings in an American hardware store.

    Bottom line: I think we're dealing with dash 10 o-rings, 1/4" id and 3/8" OD.
    Last edited by John D in CT; 03-08-2012 at 02:20 AM.

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    Thanks for the info john d, that's really interesting.

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    Thanks John D! I'll order a pack in bulk and follow up with how well they fit.

    Edit:

    So I searched around a bit.

    Madvapes - $0.30 Each

    The O-Ring Store has about 15 different materials you can choose from, here's a selection of materials with the correct size and their price, by the way I have no idea what the different materies are. As best I can tell they are for various specific applications and have different characteristics as to how they perform with various materials. I feel like we can just buy the cheapest ones in this case.



    There are about 10 other materials to choose from, as well as metric sizes. I have no idea if the material matters, nor do I know what the diameter of the o-ring itself is. That being said I feel like the Buna-N 70 @ 6 cents each (SAE Size).

    John D: Can you try to measure the cross section diameter? Can't really order anything until I know that. All of the above prices are based on 1/16" CS Diameter. The o-ring store also has metric so if a metric size is better to use, we can do that.
    Last edited by werkkrew; 03-08-2012 at 02:33 PM. Reason: information
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    "John D: Can you try to measure the cross section diameter? Can't really order anything until I know that. All of the above prices are based on 1/16" CS Diameter. The o-ring store also has metric so if a metric size is better to use, we can do that".

    I'm going to go ahead and confirm that the proper size o-ring for a drip tip that fits a 510-type cartomizer is dash 10. Again, Dash 10 has an ID of 1/4" and an OD of 3/8", which implies a wall thickness (cross section) of 1/16". Doing the math, and ID of 1/4" (4/16) plus (2 x 1/16") = 6/16" or 3/8". In other words, the inside diameter plus twice the thickness (cross section) of the o-ring material = the OD.

    As for the material that the o-ring is made of, I'd go with viton. What you get in hardware stores, and probably from e-cig vendors, is almost undoubtedly Buna-N (N is for nitrile) , and evidently the durometer (hardness scale) 70 is the cheapest and also probably the msot common. The other materials include viton, silicone, EPDM (ethylene propylene), neoprene, polyethylene, teflon, and ... wait for it .... Kalrez and FEP.

    OK, borderline TMI. Bottom line: get viton dash 10 if you can find it. Why viton? The most important characteristic of this material for our purposes, in my opinion, is "compression set"; the ability of the material to retain its nominal dimensions when under constant compression. In other words, it resists getting smooshed better than a buna-N o-ring. "Good" versus "fair" according to the McMaster-Carr chart. (Here's another possible edge for viton: resistance to animal/vegetable oils "excellent", versus "good" for buna-n.

    Viton o-rings cost about $.0531 each, as opposed to about $.0211 for buna-n.

    Part number for dash 10 buna-n: 9452K18, $2.11 per 100.

    Part number for dash 10 viton: 9464K15, $5.31 per 100.

    http://www.mcmaster.com/#o-rings/=gkw5o7 (Viton)

    http://www.mcmaster.com/#o-rings/=gkw6zh (Buna-N)

    http://www.mcmaster.com/#o-rings/=gkw83z (Cool chart all about the properties of O-rings; a real page-turner)

    OK, that's it for me; I'm all "o-ringed" out.
    Last edited by John D in CT; 03-09-2012 at 04:52 AM.

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    wow! I'm ordering a 100 pack of the Viton dash 10's then. The ones I already have need replacing for the exact reason you stated. They got stretched/worn out very quickly due to compression and I suspect exposure to juice.

    Thanks again!

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