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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | SA18 |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
250.00 oz-in
18.00 kg-cm
1.8 N-m
7.4V
222.00 oz-in
15.99 kg-cm
1.6 N-m
6.0V
181.00 oz-in
13.03 kg-cm
1.3 N-m
4.8V
153.00 oz-in
11.02 kg-cm
1.1 N-m
Average
|
| Speed |
8.4V
0.11 sec/60°
545.5 deg/s
90.9 RPM
7.4V
0.12 sec/60°
500.0 deg/s
83.3 RPM
6.0V
0.13 sec/60°
461.5 deg/s
76.9 RPM
4.8V
0.14 sec/60°
428.6 deg/s
71.4 RPM
Below Average
|
| Physical | |
| Weight | 1.80 oz51.0 gAverage |
| Dimensions |
L 1.61 in W 0.80 in H 1.04 in L 40.9 mm W 20.3 mm H 26.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | FET |
| Gears | Steel |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 180° |
| Mechanical Limit | No Limit |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Magnetic Encoder |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Temperature | -15–70 °C5–158 °F |
| Water Rating | IP67 |
| Certification | CE | ROHS | FCC |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 180 mm7.09 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 54% of 186 Digital Low Profile servos at 4.8V |
| Speed | Below Average Faster than 12% of 183 Digital Low Profile servos at 4.8V |
| Weight | Average Lighter than 54% of 304 Digital Low Profile servos |
Performance Analysis
| Shaft Power | 2.02–4.20 W |
| Power Density | 3.137 W/in³ More power-dense than 46% of 273 Digital Low Profile servos |
| Torque Density | 3.0000 oz-in/g Stronger than 52% of 185 Digital Low Profile servos |
| Torque-to-Volume Ratio | 114.22 oz-in/in³ Denser torque than 56% of 186 Digital Low Profile servos |
| Speed-to-Weight | 0.14006 (1/sec·g) Faster than 17% of 182 Digital Low Profile servos |
| Speed-Torque Trade-off | 21.42 Better balanced than 75% of 183 Digital Low Profile servos |
| Torque Gain per Volt | 17.61%/V More voltage-responsive (torque) than 63% of 164 Digital Low Profile servos |
| Speed Gain per Volt | 7.58%/V More voltage-responsive (speed) than 4% of 163 Digital Low Profile servos |
| Voltage Range Width | 3.6 V Wider voltage range than 80% of 276 Digital Low Profile servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 77% of 79 Digital Low Profile servos |
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