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Old 06-24-2011, 09:00 PM   #1
sdugre
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Default Motor for HLT Stirrer

Any reason this gear motor wouldn't work as a stirrer for an HLT?

https://www.surpluscenter.com/item.a...tname=electric

It's rated for continuous duty and the price is certainly right, but the 1/100 HP rating is questionable.

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Old 06-24-2011, 10:31 PM   #2
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The air fan on my PC has a bigger motor than that! You wouldn't need much to get a small current going, but anything bigger than a tiny impeller/prop will burn that sucker out.

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Old 06-24-2011, 11:13 PM   #3
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Quote:
Originally Posted by outside92129 View Post
The air fan on my PC has a bigger motor than that! You wouldn't need much to get a small current going, but anything bigger than a tiny impeller/prop will burn that sucker out.
I disagree entirely. That gearmotor will have way more torque than any standard PC fan motor. it's geared down. That's why they call it a gear motor. I see absolutely no reason why it would not work. Much would depend on the size of the propeller, but I don't think it would have to be a huge one to get the job done. In any case, the $6.65 price tag makes the risk rather trivial. I'd give it a try.
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Old 06-25-2011, 02:19 AM   #4
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Is there a calculation or series of calculations that you can do to see how much torque would be needed to move a certain sized prop in water?

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Old 06-25-2011, 08:58 PM   #5
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Thanks for the replies. I guess I'll give it a shot and let you know how it works out.

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Old 06-26-2011, 05:07 AM   #6
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Just curios why you putting stirrer in your hlt?

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Old 06-26-2011, 11:52 AM   #7
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To prevent hotspots and get an accurate temp reading.

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Old 06-26-2011, 05:13 PM   #8
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Exactly. It's going to be an electric HLT and I need the temperature to be consistent throughout the vessel.

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Old 06-26-2011, 05:30 PM   #9
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It is not only the consistent HLT temp, it is also having a decent cross flow on the HLT coil that eliminates the thermal barrier. The coil will have the exact same temp as the water in the HLT. Without stirring that is not possible.

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Old 06-26-2011, 07:22 PM   #10
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Why not just have the pump recirculate the water?

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