http://www.allelectronics.com/make-a-store/item/DCM-351/24-VDC-GEAR-MOTOR-W/TURNTABLE/1.html
Description:
24 VDC GEAR MOTOR W/ TURNTABLE
Relatively powerful, low-current DC motor and gearbox with a 4.9" diameter plastic (nylon?) turntable with a rubber o-ring circumference that could be used to drive another wheel. Turntable can be removed from motor and rubber ring on turntable can be removed as well. Motor gearbox has a 5/16" diameter shaft that is flatted and splined.
Specs:
- 45RPM @ 24 Vdc, 60mA - operates at 12Vdc at 1/2 speed.
- Drive motor - Mabuchi RS-380SH. 1.1" diameter x 1.67".
- Gearbox - Molon #CHM-2435-1. 2.75" x 3.00" x 0.57" Threaded mounting holes in four corners. 5/16" diameter shaft, flatted and splined.
Price for ten - $9.75 each Shipping for 10 - $7.00
PROS -
Medium Torque
Seller has good shipping policy
Good price
Good customer service
Seems happy in low torque continuous use
Electrical connection are very easy to get to.
This motor had enough torque at 12 volts to spin the 8oz test weight at high rpm with some strain.
Comes with 4.9" plastic wheel. This should provide lots of easy way to drive loads.
Easy to mount using 4 existing through holes in the gearbox.
CONs -
A bit noisy under load
RPM a bit high at rated 24 volts
Output shaft a bit short
Modifications -
I removed the wheel from the drive shaft. I did this to demonstrate how easy it was to adapt the ouput shaft. I used a U-bolt to attach the crank arm to the shaft. For this test I ran the motor at 12 volts. RPM at 12 volts is a bit high for a FCG but for a spider or other animation this motor at 12 volts should be a good choice.
The ideal solution would be to use a PWM module with this motor and 24 volts. This will give you good torque over a wide RPM range.
Comments - I have not tried this yet, but repacking the gearbox with a heavy (wheel bearing) type grease should reduce the noise level.
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