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Technical Specifications
Last Updated: 2026-10-08
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
Below 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 58% of 46 Large servos at 4.8V |
| Speed | Below Average Faster than 29% of 42 Large servos at 4.8V |
| Weight | Bottom 10% Lighter than 5% of 172 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 43% of 135 Hitec servos |
| Torque-to-Volume Ratio | 39.81 oz-in/in³ Denser torque than 28% of 135 Hitec servos |
| Speed-to-Weight | 0.03463 (1/sec·g) Faster than 10% of 135 Hitec servos |
| Speed-Torque Trade-off | 52.25 Better balanced than 86% of 135 Hitec servos |
| Torque Gain per Volt | 20.61%/V More voltage-responsive (torque) than 75% of 124 Hitec servos |
| Speed Gain per Volt | 29.77%/V 4th-highest speed gain per volt of 124 Hitec servos |
| Voltage Range Width | 1.2 V Wider voltage range than 15% of 167 Hitec servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0068 Finer dead band than 3% of 118 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.