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devongrrl
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Keck clips
Does any know where the cheapest place to purchase joint clips is?
I'm looking for B19 size, I believe thats blue ?
I'm in the Uk btw.
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DJF90
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Devongrrl - I am also in the UK, and you are correct, B19 clips are blue. However, I have found that keck clips can be insanely expensive for what
they are, having seen sources where they are almost £5 each (or more!!). I was lucky enough to get ten or so from a friend when he had a couple he
wanted to get rid of for cheap 
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Picric-A
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I buy them in packs of 6 from phillip harris for just under £4.
SGL glassware also sell them fairly cheaply.
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Formula409
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eBay also is quite good for these sort of things.
Formula409.
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aonomus
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Not to derail, but what have peoples experiences been with metal keck clips for anything with high temperatures? Are they worth the cost?
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devongrrl
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I couldn't see them on the Philip Harris website but I guess I could always request a catalogue from them.
SGL look good.
Thanks for the the heads-up all.
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Magpie
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Quote: Originally posted by aonomus  | | Not to derail, but what have peoples experiences been with metal keck clips for anything with high temperatures? Are they worth the cost?
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I used metal clips in organic chemistry class and liked them very much. I've melted 2 or 3 of the plastic clips when getting them too hot. Since I
couldn't find any metal clips I bought some Teflon clips which are better and good up to 250C.
The ones we used in class had a little spring. I haven't been able to find them in any catalogs.
The single most important condition for a successful synthesis is good mixing - Nicodem
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User
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I have both plastic and metal ones.
Also i have melted a couple of plastic ones, shame.
Just wondering about something:
Are metal clips at high temp not going mess with the expansion of the glass and thus breaking stuff?
Never had this myself , just want to know if there is a risk involved at all.
Btw, ive also seen clamps that look like the things one uses to hang the laundry( cant figure the word) some sort of clamps.
The seemed pretty nice to me.
[Edited on 1-11-2009 by User]
What a fine day for chemistry this is.
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1281371269
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Any ideas on an easy way to improvise them? I tried elastic bands which didn't work but I think the adjustable strips used to hold trees to growing
posts do it.
They're quite expensive for what they are - then again cheaper than the glassware they prevent falling and breaking.
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User
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Yeah ive seen an improvised way.
Take some steel wire and wrap it around the joint , than give it a couple of twists.
Do this on both joints and give 'm one turn together, youll figure out how it looks like.
Haven't used this myself but seen it on some pictures somewhere.
What a fine day for chemistry this is.
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aonomus
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Some glassware have these little protrusions where you can attach springs to them, but these aren't terribly common, all ground glass joints have the
neccessary lips to fit a keck clip on...
Perhaps some common A clamps (might be too much force) or clothes pins can be modified with metal plates that can grab onto the ground glass joints.
The other thing that comes to mind are 2 metal plates with a U cutout, one for the top and one for the bottom, sized just like a keck clip; machine
screws + wingnuts hold the clamp in place... Anyone with a mill want to try making this? Would the metal's expansion put the glassware at risk in any
way?
I've broken a few before, one on a rotovap and one that was holding a flask in a dry ice/acetone bath (brittle at cold temperatures?). Fortunately,
the university doesn't make us pay for these things 
For North America, I know you can get both plastic and metal keck clips from United Glass tech., but they are overpriced....
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Picric-A
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| Quote: Originally posted by devongrrl | I couldn't see them on the Philip Harris website but I guess I could always request a catalogue from them.
SGL look good.
Thanks for the the heads-up all.
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I found them after a search, wasnt hard:
http://www.philipharris.co.uk/webapp/wcs/stores/servlet/Cata...
guess they r cheaper than £4, only £2.95 here.
I have two metal clips for the new rotovap, and i find them good, i just worry about scratching my glassware used for vaccums.
As for the plastic ones, i have snapped a few, burnt a few and melted a few but hey.. they are cheap!
I do want to invest in some PTFE ones, they seem a good option! they are selling a set on ebay for £4.
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Picric-A
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| Quote: Originally posted by User | I have both plastic and metal ones.
Just wondering about something:
Are metal clips at high temp not going mess with the expansion of the glass and thus breaking stuff?
Never had this myself , just want to know if there is a risk involved at all.
[Edited on 1-11-2009 by User] |
The clip would stretch with the glassware, i doubt there is any risk at all.
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devongrrl
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| Quote: Originally posted by Picric-A | I buy them in packs of 6 from phillip harris for just under £4.
SGL glassware also sell them fairly cheaply. |
Both SGL & Philip Harris told me when I enquired they are now selling them singly and not in packs ?
SGL seems the cheapest @ £ 1.30 each for the B19 clips plus P&P
That seems the best option for me.
Thanks everyone for the pointers.
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DJF90
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I;ve never seen these items listed in packs, with the exception of a 5-pack once sold on ebay that I saw. Hence why I stated a price of about £5 each
(obviously varies with quality of clip and supplier).
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1281371269
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Sorry to bring up this old thread, but I've had no luck getting hold of these.
I want about 3 each in B19 and B14, don't care about the material particularly.
Based on past experiences, I consider Philip Harris to be pretty much the worst (legal) company I've ever had the misfortune of dealing with. However,
I had a look anyway: They're not brilliantly priced considering the high P&P but anyway they don't specify which size you're buying on their
website and didn't reply to my email.
I've emailed SGL but got no reply. So can anyone suggest another company, or have some they could sell me? I could also do a trade for equipment or
chemicals.
Thanks!
[Edited on 26-3-2010 by Mossydie]
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plastics
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Is this any help?
http://www.thelabwarehouse.com/eng/search/?SrchTxt=joint+cli...
Not cheap but have some myself - they work very well
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Picric-A
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Thats very expencive seeing as they are £4 each. Phillip harris sells them in packs which makes them a lot cheaper overall.
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1281371269
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To be fair though those are PTFE. I didn't know the PH ones were in packs?
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starman
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Hi Mossydie.I use United Glass Technology.Full range of clips,packs of 5 or 10.Fast international postage.(they're US based)
Chemistry- The journey from the end of physics to the beginning of life.(starman)
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1281371269
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UGT have great prices on the clips, but want $22.50 for postage. Which is weird, because for one set it was only $12.50 P&P
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Picric-A
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Mossydie- yes the PH ones are in pack of (i think) 6 and are £3 each. i dont consider that a bad price however they are plastic and i get though them
relativly fast due to them snapping or melting.
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starman
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| Quote: Originally posted by Mossydie | | UGT have great prices on the clips, but want $22.50 for postage. Which is weird, because for one set it was only $12.50 P&P
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You're kidding? Just bought a new pack of 19/22.Postage to Australia was only $6.
Chemistry- The journey from the end of physics to the beginning of life.(starman)
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1281371269
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Well that's what the website said...maybe I'll email them and ask.
How sensitive are the standard plastic ones - is it worth spending more for PTFE?
[Edited on 28-3-2010 by Mossydie]
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Skyjumper
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eBay?
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