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Graupner HBS 870 BBMG HV BL Digital Servo

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Part Number: GR-7991

Hong Kong


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Graupner servos are manufactured with high-quality components such as ball bearings, the Graupner HBS 870 BBMG Speed High-Voltage Brushless Digital Servo provides the same great performance as a common standard servo. Optimized for high voltage (8.4V) operation, the HBS 870 BB is specially designed around a high-performance brushless motor and heat sink case to provide lower operating temperatures and longer run times. Fully programmable to meet your unique specifications via the free Graupner Servo Setup Software, the 870 BBMG is ideally suited for use with Tail servo for 700-800 size helicopters, IMAC class airplanes, Large scale airplanes and also boats, cars and motorcycles. Overvoltage diodes provide protection against voltage peaks caused by return currents.


  • High performance Brushless motor
  • Supports High Voltage 8.4v (2S lipo)
  • Five times more durable and 30% faster response times than brushed servos
  • Low current consumption equivalent of 5.0V class Digital Servo
  • Programmable Digital Circuit and SMT circuitry
  • 2048 high resolution
  • Supporting 1-16µ depending on programming
  • Wide frame rate range of 20Hz-400Hz
  • 12-bit processing circuit (twice resolution comparing to 10-bit processing circuit)

Included with the package:

  • Graupner HBS 870 BBMG HV BL Digital Servo x 1
  • Horn set


  • Servo series: HBS Servo
  • Category: BLDC High Voltage
  • Type: Digital
  • Motor: BLDC
  • Speed:
    • @4.8V: 0.16 Sec/60
    • @6.0V: 0.14 Sec/60
    • @7.4V: 0.11 Sec/60
  • Torque:
    • @4.8V: 118.06
    • @6.0V: 152.78
    • @7.4V: 180.56
  • Gear: 1+3 Metal
  • Bearing: 2BB
  • Connector type: JR
  • Size: 1.57" x 0.77" x 1.65"
  • Weight: 70g/2.47 oz
  • Horn size: Ø 6(25T)