Micro-Mark
Micro-Mark Motorized Planetary Gearbox
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Micro-Mark
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Motorized Planetary Gearbox



Animate Your Model Railroad!


This miniature DC gearmotor includes 4 color-coded planetary gearsets (3:1, 4:1, 5:1, and 6:1 speed reduction ratios) that you stack in various combinations to provide the high-torque, low output speed you need for powering your working model or animation project.

The high-efficiency permanent-magnet motor runs 8,500 rpm at 6 volts to 19,680 rpm at 24 volts and is polarity reversible.

Fourteen different gearbox combinations provide complete output speed range from 13.8 to 6,560 RPM.

  • Output shaft is 4mm (5/32') dia. x 11mm (7/16') long
  • Overall size with all 4 gearboxes installed is 1-3/8" sq. x 4-1/4" long
  • Each gearset is 5/16" thick
  • Motor size: 1-3/32" dia. x 1-1/2" long
  • Maximum motor torque at 24v: 700 gm-cm (multiply by gear ratio to obtain output torque)
  • Typical current at normal load at 12v: .75a
  • Stall current at 12v: 3.9 a; at 24v: 6.5a
  • Maximum voltage: 24v DC
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MM-82722
Motorized Planetary Gearbox

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MSRP: $35.99

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