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HS-55 Servo

  • HS-55 top view
  • HS-55 shown with quarter for scale
  • HS-55 back view
  • HS-55 side view
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The HS-55 set the standard for affordable performance, offering precision components that have been engineered to provide long lasting trouble free service! Featured in a hundred model aircraft reviews worldwide, the HS-55 is your best choice when it comes to controlling ”smaller” Electric’s and Park Flyers.

Dimensions 0.89" x 0.45"x 0.94" (22.8 x 11.6 x 24mm)
Product Weight 0.28oz (8g)
Output Shaft Style 15 tooth (A1) spline
Voltage Range 4.8V - 6.0V
No-Load Speed (4.8V) 0.18 sec/60°
No-Load Speed (6.0V) 0.14 sec/60°
Stall Torque (4.8V) 16.66 oz-in. (
Stall Torque (6.0V) 20.83 oz-in. (
Max PWM Signal Range (Standard) 615-2390μsec
Travel per µs (out of box) .114°/μsec
Max Travel (out of box) 203°
Pulse Amplitude 3-5V
Operating Temperature -20°C to +60°C
Current Drain - idle (4.8V) 5.4mA
Current Drain - idle (6.0V) 5.5mA
Current Drain - no-load (4.8V) 150mA
Current Drain - no-load (6V) 180mA
Continuous Rotation Modifiable No
Direction w/ Increasing PWM Signal Clockwise
Deadband Width 8µs
Motor Type Coreless
Feedback Style 5KΩ Potentiometer
Output Shaft Support Outer case serves as bearing
Gear Type Straight Cut Spur
Gear Material Nylon
Wire Length 6.29" (160mm)
Wire Gauge 28AWG

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