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Old 12-30-2012, 02:39 AM   #1
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Default Couple of stir plate build questions

What type of epoxy do you guys use to glue the large washer to the fan? I tried hot glue and it doesnt stick worth a damn.

Do you also epoxy the magnet to the washer?

The fan I pulled from the old tower does not seem to have a lot of oomph. It spins just fine, but it doesnt take much to stop the spinning. A light touch and it stops. Is this normal?

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Old 12-30-2012, 03:17 AM   #2
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I just used super glue with the washer. Then the magnet just sticks to the washer without glue. I stack two magnets. Also, my fan is pretty weak too, but it's still enough to spin the stir bar in 1500 mL.

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Old 12-30-2012, 03:44 AM   #3
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Hmmmm...I used hot glue on mine and it's held for almost three years now. I know there are different types of glue sticks (heavy duty versus general purpose) so maybe try a different one.

Regarding the fan power, how many volts is your power supply? Could be that your fan is worn out if it came from an old tower. I only run 6 volts through mine because 12 was way too much power. It has quite a bit of power though...I wouldn't voluntarily try stopping it with my finger.

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