HS-318 Servo-Stock Rotation


The Hitec HS-318 servo is a 25 tooth version of the HS-311.  This servo provides the reliability Hitec is known for, without the price tag the high end models carry.  As with the HS-311, The HS-318 is a great option for entry level flyers and RC vehicles.  The nylon gears have great wear characteristics and provide tight tolerances for a zero backlash geartrain.

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 relativly 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 H25T Spline
Voltage Range 4.8V - 6.0V
No-Load Speed (4.8V) 0.19sec/60°
No-Load Speed (6.0V) 0.15sec/60°
Stall Torque (4.8V) 42 oz-in. (3.0 kg.cm)
Stall Torque (6.0V) 51 oz-in. (3.7 kg.cm)
Travel per µs 0.095°/μsec
Max Rotation 210°
Pulse Amplitude 3-5V
Operating Temperature -20°C to +60°C
Current Drain - idle (4.8V) 7.4mA
Current Drain - idle (6.0V) 7.7mA
Current Drain - no-load (4.8V) 160mA
Current Drain - no-load (6V) 180mA
Continuous Rotation Modifiable Yes
Direction w/ Increasing PWM Signal Clockwise
Deadband Width 5µs
Motor Type Cored
Feedback Style 5KΩ Potentiometer
Output Shaft Support One Resin Bushing
Gear Material Nylon
Wire Length 11.81" (300mm)
Weight 1.55oz (43g)
Wire Gauge 25AWG
Max PWM Signal Range 437-2637μsec
Servo Size Standard

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