HS-318
20mm, Standard Voltage, 25T, Resin Gear Actuator(6V)
The HS-318 is a 20mm standard analog servo actuator designed for general-purpose RC and hobbyist applications where reliable performance and value pricing are the priority. Featuring a three-pole ferrite cored motor, four resin gears, and a 25T (Ø6mm) output spline, the HS-318 offers broad compatibility with standard RC vehicles, aircraft, boats, and entry-level robotics mechanisms.
Operating at 4.8–6.0V via PWM control, the HS-318 delivers stall torque of up to 3.7 kgf·cm (51.38 oz·in) at 6V with a no-load speed of 0.15 sec/60° — solid performance for a servo weighing just 43 grams in a 40.0 × 20.0 × 37.0mm form factor. The 25T spline ensures compatibility with a wide range of standard servo horns and linkages.
As an analog servo, the HS-318 provides smooth, proportional control response suited for applications where simplicity and cost-effectiveness matter more than digital precision — making it an ideal choice for beginners, educators, and hobbyists building or restoring RC models.
One of Hitec's most proven and widely used servo designs, the HS-318 reflects 50+ years of Hitec engineering reliability. Backed by RoHS compliance and Hitec Commercial Solutions' dedicated North American support team, it's a dependable foundation for any standard servo application.
Part #: 31318S
$16.49
| Performance Specifications | |
|---|---|
| Command Protocol |
PWM |
| Operating Voltage (V) |
Min: 4.80
Max: 6.00 |
| Weight (g) | Min: 43.00 |
| Stall Torque (kgf•cm / oz•in) |
Min: 3.0 / 41.66
Max: 3.7 / 51.38 |
| No Load Speed (sec/60°) |
Min: 0.19
Max: |
| Running Current (mA) |
Min: 160
Max: |
| Stall Current (mA) |
Min: 800
Max: |
| Circuit |
Analog |
| Rotation |
Standard |
| Operating Voltage (V) |
Min: 4.80
Max: 6.00 |
| Torque Range |
Min (KG/CM): 3.70
Max (N/CM): 0.00 |
| Max Speed (SEC/60) | 0.15 |
| Physical Specifications | |
|---|---|
| Case Size (mm) | 20.00 |
| Dimensions (mm) | 40.0 x 20.0 x 37.0 |
| Weight (g) | 43.00 |
| Motor Type | Cored Metal Brush |
| Potentiometer |
Conventional |
| Gear Material | 4 Resin Gears |
| Horn Gear Spline | 25T (Ø6) |
| Case Material | Engineering Plastic |
| IP Rating |
N / A |
Contact Sales directly for accessories and/or replacement parts:
• Case Set
• Gear Set
• Horn Set
Actuator Sales
sales@hiteccs.com
Additional downloads can be found on our ACTUATOR RESOURCES page under our Support tab.
Contact Sales directly if you are unable to locate a specific resource download:
Actuator Sales
sales@hiteccs.com
