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  • MCR Gearbox 13-70-78-135-109-A, DIY kit
  • MCR Gearbox 13-70-78-135-109-A, DIY kit

MCR Actuator 13-70-78-135-109-A, DIY kit

199.00 CAD

This kit features all the non-printable parts of the gearbox in the main picture. Combine multiple gearboxes to build many kinds of robots.

Print it yourself and follow our assembly instructions to put it together.  For the printable files, please visit https://www.thingiverse.com/thing:4923859

Assembly instructions coming soon.  The lead time is 6-8 weeks.  Orange output piece not included.  For more information, please contact us.


  • max static output torque: 20Nm
  • max dynamic output torque: 13Nm
  • max input speed: 4000 RPM very briefly.  1000 RPM for 30 seconds.
  • Operating temperature: 10-48C.
  • Outer dimensions: 70x78x135cm. Full exterior schematic available by request.
  • 109 full steps per degree, (0.00917431192 degrees per step).  At 1/32 microstepping you can get up to 3488 steps per degree (0.00028669724 degrees per step).
  • Class A, no internal circuit.

    Kit contents

  • 70:1 harmonic gearbox
  • NEMA17 stepper motor
  • GT2-6-20 pulley
  • GT2-6-186 timing belt
  • fasteners

How to video