Control System: +Pulse Width Control 1500usec Neutral
Required Pulse: 3-5 Volt Peak to Peak Square Wave
Operating Voltage: 4.8-6.0 Volts
Operating Temperature Range: -20 to +60 Degree C
Operating Speed (4.8V): 0.18 sec/60° at no load
Operating Speed (6.0V): 0.14 sec/60° at no load
Stall Torque (4.8V): 16.66 oz-in. (1.2kg.cm)
Stall Torque (6.0V): 20.83 oz-in. (1.5kg.cm)
Operating Angle: 40° one side pulse traveling 400usec
Continuous Rotation Modifiable: Yes
Direction: Clockwise/Pulse Traveling 1500 to 1900usec
Current Drain (4.8V): 5.4mA/idle and 150mA no load operating
Current Drain (6.0V): 5.5mA/idle and 180mA no load operating
Dead Band Width: 8usec
Motor Type: Coreless
Potentiometer Drive: Direct Drive
Bearing Type: None, outer case serves as bearing
Gear Type: All Nylon
Connector Wire Length: 6.29" (160mm)
Dimensions: 0.89" x 0.45"x 0.94" (22.8 x 11.6 x 24mm)
Weight: 0.28oz (8g)

The HS-55 servo is the best deals going when it comes to sub-micro servos. There may be slightly cheaper servos on the market, but you get what you pay for. The HS-55 servo is the standard by which all other sub-micros are compared. We have tested just about every servo in this class and honestly, it’s the best in this category. 

Detailed Specifications


 18 oz-in.


 0.14 sec/60°










This servo can operate 180° when given a pulse signal ranging from 600usec to 2400usec. Since most R/C controllers cannot generate this wide of signal range, you will need to use our servo stretcher for 180° operation.

Servo Angle Schematic 180 3.8
A1 Hitec Spline3

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Use A1 Micro Spline

Conversion Calculators - Click Here

Hitec Servo Accessories

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Servo Screws

Servo Hardware

Servo Extensions

Servo Arms

Hitec Casesets

General Servo Information

What is a servo?
How servos work
What servo to use
Servo power & speed
Rotation direction
Connector types
180º rotation
Continuous rotation


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