HS-85BB Servo-Clockwise (stock)


The HS-85BB features a high power motor for greater speed and torque. The HS-85BB is the choice of modelers looking for a high performance servo without breaking the bank. The ball bearing supported output shaft and sturdy gear trains are preferred for smaller glow and electric airplanes, helis and sail planes.

How Far Will This Servo Rotate?

The answer to this question is partially dependent on what you are using to control the servo.
Click for a quick video explanation.

With an Average Radio System:
Your average transmitter and receiver will output a relatively narrow PWM signal range.

Radio System + Travel Tuner:
Adding a Servo Travel Tuner to your radio system setup will allow you to achieve wide PWM signal ranges.

Wide Signal Controllers:
Controllers such as the Servo Commander, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.

Tech Tips


Output Shaft Style C24T Spline
Voltage Range 4.8V - 6.0V
No-Load Speed (4.8V) 0.16sec/60°
No-Load Speed (6.0V) 0.14sec/60°
Stall Torque (4.8V) 41.66 oz-in (3 kg.cm)
Stall Torque (6.0V) 48.6 oz-in (3.5 kg.cm)
Max PWM Signal Range 553-2300μsec
Travel per µs .104°/μsec
Max Rotation 182°
Pulse Amplitude 3-5V
Operating Temperature -20°C to +60°C
Current Drain - idle (4.8V) 8mA
Current Drain - idle (6.0V) 8.6mA
Current Drain - no-load (4.8V) 240mA
Current Drain - no-load (6V) 260mA
Continuous Rotation Modifiable No
Direction w/ Increasing PWM Signal Clockwise
Deadband Width 8µs
Motor Type 3 Pole Ferrite
Feedback Style 5KΩ Potentiometer
Output Shaft Support Top Ball Bearing
Gear Material Nylon
Wire Length 6.29" (160mm)
Weight 0.67oz (19.2g)
Wire Gauge 28AWG
Servo Size Micro

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