$9 Chinese Metal Gearmotors
erco's in love! Big slow gearmotors ~$8 each, plus $1 shipping each. Available in four gear ratios, your choice of 3.5RPM, 15RPM, 30RPM or 70 RPM: http://www.ebay.com/itm/332053386842
![s-l1600.jpg](http://i.ebayimg.com/images/g/13gAAOSwj85YRQBx/s-l1600.jpg)
I got two of the 70RPM units to slow down my too-fast Stingray many moons ago:
![](https://img.youtube.com/vi/cAbjISH5WS4/0.jpg)
![s-l1600.jpg](http://i.ebayimg.com/images/g/13gAAOSwj85YRQBx/s-l1600.jpg)
I got two of the 70RPM units to slow down my too-fast Stingray many moons ago:
![](https://img.youtube.com/vi/cAbjISH5WS4/0.jpg)
Comments
70RPM@12V motor =140RPM@24V with bonus smoke
https://www.aliexpress.com/item/ONE-Set-of-Car-Parts-included-25mm-motor-65mm-Metal-wheel-Tyre-coupling-motor-bracket/32608772127.html
on the same site they have this for just the motor/gearbox/sensor unit (seems to be the same)
Feature
Name: 25mm gear motor
Output speed: 150±10%rpm
No_load Current: 200mA (Max)
Stall current: 4500mA(max)
Stall torque: 9.5kgNaN
Rated speed: 100±10%rpm
Rated torque: 3000gNaN
Rated Current: 1200mA (Max)
Noise: 56dB
Working voltage: 9V
Outside Shaft Length: 14.5mm
Shaft End Play: 0.05-0.50mm
Screw Size: M3.0
Dia. Of Shaft phi4mm, D3.5
encoder: 2 pulses/circle
Dave