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Technical Specifications
Last Updated: 2026-10-21
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 31815S |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
343.00 oz-in
24.70 kg-cm
2.4 N-m
4.8V
275.00 oz-in
19.80 kg-cm
1.9 N-m
Average
|
| Speed |
6.0V
0.14 sec/60°
428.6 deg/s
71.4 RPM
4.8V
0.19 sec/60°
315.8 deg/s
52.6 RPM
Average
|
| Running Current |
6.0V
0.830 A
830 mA
4.8V
0.700 A
700 mA
|
| Physical | |
| Weight | 5.36 oz152.0 gBottom 10% |
| Dimensions |
L 2.59 in W 1.18 in H 2.26 in L 65.8 mm W 30.0 mm H 57.4 mm |
| Drivetrain | |
| Motor Type | 3-pole |
| Gears | Nylon |
| Gear Spline/Teeth | 15 T estimate |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Analog |
| Direction | Clockwise |
| Rotational Range | 200° |
| Mechanical Limit | 200° |
| Pulse Cycle | 20 ms |
| Pulse Width | 920-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 8 µs |
| Refresh Rate | 50 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Signal Voltage | 3-5V |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Temperature | -20–60 °C-4–140 °F |
| Connectivity | |
| Connector | S |
| Wire Length | 300 mm11.81 in |
Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.
Class Comparison
| Torque | Average Stronger than 62% of 40 Large servos at 4.8V |
| Speed | Average Faster than 49% of 40 Large servos at 4.8V |
| Weight | Bottom 10% Lighter than 9% of 174 Large servos |
Performance Analysis
| Shaft Power | 2.68–4.53 W |
| Power Density | 0.656 W/in³ More power-dense than 22% of 185 Hitec servos |
| Torque Density | 1.8092 oz-in/g Stronger than 45% of 133 Hitec servos |
| Torque-to-Volume Ratio | 39.81 oz-in/in³ Denser torque than 28% of 133 Hitec servos |
| Speed-to-Weight | 0.03463 (1/sec·g) Faster than 10% of 131 Hitec servos |
| Speed-Torque Trade-off | 52.25 Better balanced than 88% of 131 Hitec servos |
| Torque Gain per Volt | 20.61%/V More voltage-responsive (torque) than 74% of 125 Hitec servos |
| Speed Gain per Volt | 29.77%/V 4th-highest speed gain per volt of 123 Hitec servos |
| Voltage Range Width | 1.2 V Wider voltage range than 15% of 170 Hitec servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0068 Finer dead band than 2% of 125 Hitec servos |
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Reviews (1)
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David H Alderton - Master Modeller
November 13, 2017Application(s): For the Manx Nobby - lugger from the Isle of Man sailing ship model
Comments: Very good servo, reliable, worked very well.