Recommendations for small stir motor

Hi all - I'm building a simple HERMS setup and I want to mount a little DC motor on top of the heater tank, sticking down through the lid into the hot water so I get a pseudo-counterflow action against the copper coils.



Can anyone recommend a source/spec on a motor for this kind of application? It won't take much power, but i'm concerned the little hobby motors @ Radioshack are too small and the monsters @ Grainger/Mouser are too big.

Thanks!

You could use an old blender motor but again that might be overkill.

Isn't someone using an ice cream motor. I realize that would be an AC motor, not DC, but a converter could take care of things.

I buy my motors from here..

http://www.herbach.com/Merchant2/merchant.mv?

If you dont mind using a 12V Dc power supply try a windshield wiper motor, or watch Ebay for an inline AC gear motor with 20-40 RPM output.

I buy my motors from here..

http://www.herbach.com/Merchant2/merchant.mv?

Click to expand...

Whoa - jackpot!

Love the idea of a blender motor! I'd have to mount it offset from center or I'd leave the heating element in the open-air 'eye of the storm' I'm indifferent to AC/DC (haha) - my HERMS cart is already wired for AC....



...so if it's not too bulky i'd just as soon avoid having to build in a transformer.