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I used those same magnets on my twin stir plates and love 'em to death.
I only used one pair end to end but I can run bars from 1" to 2" at full speed without chucking them...
Cheers!
Where did you get the magnets?
I got them from amazon but they are no longer available there.
Is this part# NSN0635? If so, Home Depot and rare-earth-magnets.com has them
Is this part# NSN0635? If so, Home Depot and rare-earth-magnets.com has them
Magcraft NSN0834 1-Inch by 1/4-Inch by 1/10-Inch Rare Earth Block Magnets, 12-Count
This is the part number and description
Thank guys, this will help steering others in the right direction as well.
I'll try HD too, no shipping...
No worries @islandlizard . It's a shame amazon no longer has them.
There are a bazillion stir-plate builds on here. I just added this crappy build because I saw someone struggling with a potentiometer for one in another thread. HBT needs another stir-plate build thread about as much as another "Is it infected?" thread.
These magnets really soup up the plate. I run it at full bore and the bar never gets thrown. Faster is better.
No Prime here, ...............
I for one did not expect the amount of butchery you forced upon that box and the fan blades. It's a marvel! You could easily pass it on to the infection thread, as is.
.
No Prime here...
Gavin,
How did you do the power supply? A USB/AC adapter to the fan's USB cord? My smartphone has one so does the fan include one? If not, how do you connect it to the wall outlet?
What made you choose the 80mm over the 120mm? Will a larger fan let you have a greater vortex? The 120mm is only a couple of bucks more.
The USB comes with it but not an adaptor. I just plug it into the wall via an adapter I have for my iPhone. (standard iPhone kit)
On the size, to be honest I didn't know there was more than 1 size. I just linked the one I bought from my amazon history.
This was not my idea. I stole it from another thread. Nothing new here I'm afraid. The fan size I suspect is unimportant. The beefy magnets are the key.
With a full 2 L flask and the fan running full pelt it is ridiculous. Almost looks like the liquid is boiling and still the bar does not get thrown. I usually make bigger than 2L so typically use my 5L flask. Again no fear of the bar being thrown at full blast.
Sorry I can't be of more help.
Fan ordered.
-islandlizard said:I for one did not expect the amount of butchery you forced upon that box and the fan blades. It's a marvel! You could easily pass it on to the infection thread, as is.
No Prime! How do you survive?
Excluding those with opposable thumbs, my Dremel-work is, as you can see, second to none.
Fan arrived yesterday, and I spent half an hour getting it ready.
I used little button magnets I had stuck on a metal cabinet. My stir bar is 1".
I have a 2-liter flask, and filled it about 1.5 liters full. It works. Who'da thunk it? It's smaller than I thought it might be, and it doesn't come with the wall-wart to plug in the USB plug, but I have a few of those lying around.
I don't have a cabinet built yet but the process is proved. Very nice, and it cost me....about $12.50. Plus a cigar box.
View attachment 342400
I went ahead and ordered my parts for one. Got everything but the magnets off Amazon. Island Lizard pointed me to this thread after answering some questions about new/used stir plates, so I'm gonna give it a go. Wish me luck.
EDIT: for those who are using a washer, are you gluing the magnets to the washer and the washer to the fan, or just the washer to the fan? Wouldn't it be better to forgo the washer? Seems less weight on the fan and a stronger pull on the stir bar from the magnets might mean a better vortex and less chance of the stir bar being thrown.
.....BTW, it was very clear why having the adjustable speed is desirable. At the faster speeds the magnets threw the stir bar. At slower speeds, nice vortex.
I wonder if a lot of that has to do with the magnets positioning and their strength. Look at the magnets in Daytripper's pic. Those look like the same ones from the Chinese seller on eBay (where I got mine). Seems the longer magnets allow faster speeds and/or a longer stir bar to be used for bigger starters.
I wonder if a lot of that has to do with the magnets positioning and their strength. Look at the magnets in Daytripper's pic. Those look like the same ones from the Chinese seller on eBay (where I got mine). Seems the longer magnets allow faster speeds and/or a longer stir bar to be used for bigger starters.
That's just a guess on my part. I have no experience except for the small StirStarter I use now. I took it apart to find a small 80mm fan with two button magnets on a pvc riser. It does a great job with 2L and smaller, but not so well above that.
With the exception of the magnets (less than $5 for 10pcs), the rest of my stuff should come in tomorrow or Wednesday. I ordered the fan and an unfinished wooden keep box for the enclosure. I even bought a couple of carboy haulers for my BMBs and all of that was less than $55. I'm hoping the box is big enough to hold a 5L flask, which will be my next purchase.
What size washer are you guys using? I may pick one up from work tomorrow.
...It is, IIRC, a 5/8" washer. It's a common size, and the outside diameter is 1".
I used hot glue to affix mine.
Got everything in last night except for the magnets. I found a metal spacer at work that's right at the same diameter as the fan's hub and as thick as the washer suggested. Got my box stained too and plan on putting another stain before I do a couple coats of poly. Got a few questions.
1) How crucial is it for the washer to be center on the fan hub? Can I just forgo the washer and mark where the magnet would be center on the fan hub and go from there? My reasoning seems to be the washer takes away some of the magnet's attracting power from the stir bar.
2) Will Gorilla Glue or Super Glue be as good as the hot glue? I mean it's going to be a permanent bond anyways.
3) Does a hole have to be drilled above the magnet?
4) Does the control knob come off, or am I going to have to drill the hole big enough for the knob to pass through?
Beautifully neat build
I bought the fan but have yet to assemble the stir plate. Just curious-I'm assuming it's normal for this one that with the knob turned all the way down, the fan still spins (at least that's how mine is)? Does that cause any issues with getting the stir bar started or does it cause any issues with small starters where you wouldn't normally need as much rotation? Thanks!
I found a 3" bar magnet that looks similar on Amazon so I ordered it.
was it this one? looking at it today...
http://www.amazon.com/CMS-Magnetics%C2%AE-Strong-Neodymium-Magnet/dp/B0181LX5Q0/
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