Merkle-Korff Brushless DC Planetary Gearmotors

Power and Control: Brushless DC Planetary Gearmotors

The 52P planetary gear reducer has higher power density and larger reduction capability in a compact package over standard parallel shaft reducers.

Merkle-Korff offers their Brushless DC gearmotors with either hall only feedback or a fully integrated control board, internal to the motor. The integral control is a fully digital control with the latest in micro-processor technology on board. The 52mm Planetary gearbox has high continuous and peak torque capability. It is also a very compact and low weight design. 


Internal Controller

  • Two quadrant programmable control: current limiting, acceleration, speed regulation, velocity profiles
  • Built-in quadrature encoder
  • Over-current protection
  • Locked Rotor Protection
  • 0 – 5 or 0 – 10 VDC speed reference voltage
  • Dynamic braking and holding capability
  • Input voltage polarity protection
  • Electronic commutation


  • Long life
  • Ball bearing construction
  • 8 pole rotor
  • 3 phase stage – wye connection
  • High energy/skewed magnets for reduced cogging
  • Integral hall sensors for rotor position
  • Class F insulation


  • Compact high torque design
  • Dual ball bearings on output shaft
  • Sintered powder metal gearing
  • Helical plastic first stage for low audible noise
  • Gearboxes are permanently lubricated with synthetic gear grease

Optional Features

  • Hall only output: externally controlled
  • Incremental Encoders: Optical, and Capacitive with various resolutions
  • Electromechanical Brakes: Power-On, Power-Off


  • Door Automation
  • Commercial food equipment
  • Pumps – Peristaltic and Diaphragm
  • Recreational Vehicle Automation
  • Pellet stove
  • Health Care – Mobility
  • Satellite positioning systems
  • AGV / Robotics

More info:

We are honored to serve as a manufacturer’s rep for Merkle-Korff Industries, an industry leader in brushless, PMDC and AC gearmotor and motor and control solutions for applications in commercial food equipment, consumer appliance, vending, pellet stove, pump, medical and other markets. A pioneer in the development of small motors and gear motors known as “sub-fractionals,” the Merkle-Korff brand has contributed to the success of countless commercial, industrial and consumer products since its founding in 1911.

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