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$9 Chinese Metal Gearmotors — Parallax Forums

$9 Chinese Metal Gearmotors

ercoerco Posts: 20,256
in Robotics
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

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



Comments

  • GordonMcCombGordonMcComb Posts: 3,366
    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: 20,256
    GordonMcComb wrote: »
    Too bad this seller doesn't have any in the unloaded 100-160 RPM range

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

  • GordonMcCombGordonMcComb Posts: 3,366
    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: 20,256
    $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
  • tritoniumtritonium Posts: 543
    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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