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Author: Subject: Lab Stands + Questions
Yttrium2
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[*] posted on 4-7-2020 at 09:46


probldem is how do I drill a centered hole, I need a 1/2" jig of some sort, like the one I posted, but the one I posted only goes to 12mm.
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Yttrium2
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[*] posted on 4-7-2020 at 11:12


Is it called a flat bottomed hole, that needs to be drilled into granite, for the rod to sit into? If the rod is .5" do I need a .5" drill bit??

Can someone please help me, what is an inexpensive jig that I can use? What kind of hole do I need to make? Flat bottomed?



what do I need to drill 3/4 of the way into the granite, and have the drill bit stop?




research has shown tape or zip ties on the drill bit



[Edited on 7/4/2020 by Yttrium2]

delete2.jpg - 43kB


but what drill bit do I need for granite that doesn't make a penetrating hole?

[Edited on 7/4/2020 by Yttrium2]
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Yttrium2
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[*] posted on 4-7-2020 at 11:33


https://www.youtube.com/watch?v=m9EvrFWwegI
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Yttrium2
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[*] posted on 4-7-2020 at 13:50


what are some thoughts on this one, it seems to be the best deal in laboratory stands/ clamps

https://www.ebay.com/itm/Retort-Stand-Support-Ring-Stand-24-...
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Steve s
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[*] posted on 4-7-2020 at 16:13


Quote: Originally posted by Yttrium2  
what are some thoughts on this one, it seems to be the best deal in laboratory stands/ clamps

https://www.ebay.com/itm/Retort-Stand-Support-Ring-Stand-24-...


Personally i'd say the pressed steel base would be a bit too light with too small of a footprint and consequently unstable. I prefer decent sized cast cast iron bases but the rest of it looks ok, 13mm rods tend to be better than 10mm ones, far less chance of ya boss clamp screw bending round it.

Pity ya not in the UK, I have some really good ones that i'm selling..

Try doing an Ebay search for old/used retort stands, they tend to be a bit more solid and often come with a couple of accessories.

[Edited on 5-7-2020 by Steve s]
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Yttrium2
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[*] posted on 4-7-2020 at 16:31


they are too pricey, I'm concerned about price.


Can I get a second opinion on the weight of the base plate of the lab stand as being an issue? I think it was said somewhere, by someone, and has henceforth become a regurgitation by the masses. It doesn't seem to me like the stand would tip over unless stuff was mounted at the tippy top, and it was knocked over. I think what determines stability is the center of gravity of the apparatus/i.e. where it is mounted too.

if I mounted 100kg on the top of the stand, that would be prone to getting knocked over because of its center of gravity, not the weight of the base plate, correct? -- I mean to say it seems to be more so the footprint of the stand that contributes to it not getting knocked over vs its weight.

[Edited on 7/5/2020 by Yttrium2]
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Yttrium2
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[*] posted on 4-7-2020 at 19:03


bump, - Going for a walk, I would like to get some responses, -- do these seem like they would tip over to ya'll based on the lower than average base plate weight?



https://www.ebay.com/itm/Retort-Stand-Support-Ring-Stand-24-...

[Edited on 7/5/2020 by Yttrium2]
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karlos³
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[*] posted on 4-7-2020 at 19:16


You really don't want to get the cheapest stand.
Consider always, that the stand bears the responsibility of everything you're going to entrust it with...
And that can easily become a few times the price of the stand, especially with such a cheaper one.
In turn, if the stand fails, then it will not only be the cost of the stand itself that can be written off, but of course everything else too...
Maybe overthink if this is really a piece of equipment you want to buy the most cheapest version of?
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Yttrium2
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[*] posted on 4-7-2020 at 20:02


Can anyone else comment on these stands? -- I'm really really on a budget.

If weight is the only issue, I can place a weight onto the stand..

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[*] posted on 4-7-2020 at 20:20


It really isn’t ideal, but i suppose that ebay one would work alright, you may have to weigh it down. A large part of knowing what will and wont work comes from experience and figuring out what works for you.



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Eddie Current
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[*] posted on 4-7-2020 at 22:24


Quote: Originally posted by Yttrium2  
Can anyone else comment on these stands? -- I'm really really on a budget.

If weight is the only issue, I can place a weight onto the stand..



A piece of threaded rod, some washers, nuts and anything you can thread them through that can act as a base plate/surface, would work just as well as any retort stand for the hobby chemist. You could even screw them in to your "lab" bench as permanent fixtures if needed.

You could even put together a lab frame on a fixed back board if you like (see images). All it requires is some imagination.

1.PNG - 120kB 2.PNG - 114kB Capture.PNG - 158kB

[Edited on 5-7-2020 by Eddie Current]
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[*] posted on 5-7-2020 at 09:42


If you don't find ready made parts as depicted above, get a steel tube and a threaded rod that fits within, and tighten it with nuts and washers to a wooden baseplate. Even threaded rod itself serves quite well, being not very aesthetic, but especially the 8.8 ones are very rigid.

If you have access or have a friend who has to tools, you can easily make much more simpler setups. I made half a dozen of stands from flat bar where I drilled and welded round bars. Baseplates are 100x200mm and the rod is 600mm long by 10mm D, and it holds stuff well. The baseplates are very lightweight so only very small items should be attached to them, otherwise I always use either added weight plates or even clamp them to the table.
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Yttrium2
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[*] posted on 5-7-2020 at 09:52


thanks for the input Refinery
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[*] posted on 5-7-2020 at 12:39


still trolling I see........



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Yttrium2
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[*] posted on 5-7-2020 at 12:59


$25 USD



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[*] posted on 7-7-2020 at 08:27


I used threaded rod and some nuts brazed at right angles. Cost about $10-15 in total. The support bushings and brackets I had lying around.





IMG_20200707_012636642.jpg - 89kB IMG_20200707_012646896.jpg - 84kB
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