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Technical Specifications
Last Updated: 2026-09-13
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 31303S |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
51.38 oz-in
3.70 kg-cm
0.4 N-m
4.8V
41.66 oz-in
3.00 kg-cm
0.3 N-m
Bottom 10%
|
| Speed |
6.0V
0.15 sec/60°
400.0 deg/s
66.7 RPM
4.8V
0.19 sec/60°
315.8 deg/s
52.6 RPM
Average
|
| Running Current |
4.8V0.150 A150 mAAbove Average |
| Physical | |
| Weight | 1.71 oz48.5 gAverage |
| Dimensions |
L 1.57 in W 0.78 in H 1.43 in L 39.9 mm W 19.8 mm H 36.3 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | 3-pole |
| Gears | Plastic |
| Gear Spline/Teeth | 24 T |
| Rotation Mode | Positional |
| Rotation/Support | Bushing |
| Control & Signal | |
| Modulation | Analog |
| Direction | Clockwise |
| Rotational Range | 90° |
| Mechanical Limit | 135° |
| Pulse Cycle | 20 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 8 µs |
| Refresh Rate | 50 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | No |
| Signal Voltage | 3-5V |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Power Source | Direct |
| Regulator Type | Direct |
| Temperature | -20–60 °C-4–140 °F |
| Idle Current | 0.008 A8 mA |
| Connectivity | |
| Connector | JR (Universal) |
| 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 | Bottom 10% Stronger than 7% of 192 Analog Standard servos at 4.8V |
| Speed | Average Faster than 39% of 190 Analog Standard servos at 4.8V |
| Weight | Average Lighter than 50% of 448 Analog Standard servos |
| Running Current | Above Average Lower draw than 90% of 50 Analog Standard servos at 4.8V |
Performance Analysis
| Shaft Power | 0.41–0.63 W |
| Power Density | 0.362 W/in³ More power-dense than 24% of 437 Analog Standard servos |
| Torque Density | 0.8590 oz-in/g Stronger than 4% of 192 Analog Standard servos |
| Torque-to-Volume Ratio | 23.79 oz-in/in³ Denser torque than 15% of 192 Analog Standard servos |
| Speed-to-Weight | 0.10852 (1/sec·g) Faster than 41% of 190 Analog Standard servos |
| Speed-Torque Trade-off | 7.92 Better balanced than 12% of 190 Analog Standard servos |
| Idle-to-Running Current Ratio | 0.053 Lower idle draw than 45% of 39 Analog Standard servos |
| Torque Gain per Volt | 19.44%/V More voltage-responsive (torque) than 72% of 145 Analog Standard servos |
| Speed Gain per Volt | 22.22%/V More voltage-responsive (speed) than 86% of 147 Analog Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 63% of 229 Analog Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0067 Finer dead band than 19% of 49 Analog Standard servos |
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Reviews (1)
-
RcDesigner
May 22, 2011Application(s): RC robot
Comments: Awesome torque, speed is decent, I did a 360 degree mod on this and it works perfectly!