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View Full Version : Small geared down electric motor



rws
08-17-2014, 09:44 AM
Looking for one, relatively small in size. No HP needed really, just a means of turning something slow, maybe 100-200 rpm? Cheap too if possible! Where would be the best place to look?

Boucher
08-17-2014, 09:58 AM
Motor from 7 day timer. I think that we got them from Grainger,

MaxHeadRoom
08-17-2014, 10:02 AM
What voltage? DC/AC? many to pick from on ebay, cheap.
Max.

gzig5
08-17-2014, 10:09 AM
I've got a couple extra BBQ rotisserie motors that run on 120V. But, they are more like 5rpm.

rws
08-17-2014, 10:48 AM
120v AC. I think the 5rpm would be too slow for what I want. I t would have to run about 30 minutes at a time.

Steve Steven
08-17-2014, 11:36 AM
Try looking at Surplus Center, they have a lot of the small AC gearmotors, from 1.8 RPM to 743RPM, heres one, 75 RPM for $7:
http://www.surpluscenter.com/Brands/ECM/75-RPM-120-VAC-SHADED-POLE-GEARMOTOR-5-1715.axd

Steve

Black_Moons
08-17-2014, 11:39 AM
CD rom drive ejection motors are really wide and narrow and run very slowly with lots of torque, I once used one to adjust the volume on my stereo with just like a 1:10 pulley gear down. (it usually comes with a pulley already on it, and some kinda gearbox in the drive?)

Also for a slightly larger motor, car power window motors have built in worm drive to like 100~ rpm and have more torque then is sane. Iv seen them for $10~20 at surplus stores.

demerrill
08-17-2014, 12:24 PM
Herbach & Rademan

http://www.herbach.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=HAR&Category_Code=MTR

David Merrill

mickeyf
08-17-2014, 12:45 PM
I have a number of free, salvaged microwave turntable motors, typically 3 or 6 rpm, you'd have to gear them up, not down. Whatever you get, consider the duty cycle. The motors I'm describing are designed to go for up to an hour easily, a CD ejection motor (I'm guessing) really only operates for a second or so, by comparison. Vehicle windshield wiper motors are another possibility.

MaxHeadRoom
08-17-2014, 01:09 PM
Ebay 110vac 20rpm 151384845166 cheap.
a couple more 161393320910
161395132543

Max.

flylo
08-17-2014, 02:21 PM
SCIPLUS.COM has them & a bunch of other fun stuff.

brian Rupnow
08-17-2014, 02:24 PM
Google "Leeson" gearmotors.--Not particularly cheap, but rugged, dependable, and you can specify voltage and rpm output.

justanengineer
08-17-2014, 04:26 PM
Take a drive on trash day and look for appliances. Sounds to me like an old microwave turntable motor would work for you.

PStechPaul
08-17-2014, 10:52 PM
http://www.mpja.com/AC-Gearmotor-115VAC-60Hz-285RPM/productinfo/30462%20MA/ 280 RPM, 120 VAC, 300 RPM, $13

http://www.mpja.com/36VDC-150-RPM-Gearhead-Motor/productinfo/31474%20MD/ 150 RPM, 36 VDC, $13

http://www.mpja.com/45VDC-140RPM-Gearmotor/productinfo/19285%20MD/ 140 RPM, 4.5 VDC, $10