$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

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I got two of the 70RPM units to slow down my too-fast Stingray many moons ago:



"When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

- Pablo Picasso

Comments

  • 5 Comments sorted by Date Added Votes
  • The slow ones might be good for general animatronics, and it can be hard to find good new (non surplus) motors for <5 RPM for holiday displays. Too bad this seller doesn't have any in the unloaded 100-160 RPM range
  • ercoerco Posts: 18,486
    Too bad this seller doesn't have any in the unloaded 100-160 RPM range

    70RPM@12V motor =140RPM@24V with bonus smoke

    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Troo enough, though we usually like to go 6-7.2V, which means 35 RPM. Won't win that line following contest, 'fraid to say.
  • ercoerco Posts: 18,486
    $15 gets you these gearmotors with encoders and stylin' wheels. No idea what the gear ratio is. Who's a gamblin' man?

    https://www.aliexpress.com/item/ONE-Set-of-Car-Parts-included-25mm-motor-65mm-Metal-wheel-Tyre-coupling-motor-bracket/32608772127.html
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Hi
    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
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