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Technical Specifications
Last Updated: 2026-10-10
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 | 3 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 59% of 136 Digital Low Profile servos at 4.8V |
| Speed | Below Average Faster than 10% of 135 Digital Low Profile servos at 4.8V |
| Weight | Average Lighter than 49% of 251 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 215 Digital Low Profile servos |
| Torque Density | 3.0000 oz-in/g Stronger than 58% of 136 Digital Low Profile servos |
| Torque-to-Volume Ratio | 114.22 oz-in/in³ Denser torque than 61% of 136 Digital Low Profile servos |
| Speed-to-Weight | 0.14006 (1/sec·g) Faster than 15% of 135 Digital Low Profile servos |
| Speed-Torque Trade-off | 21.42 Better balanced than 81% of 134 Digital Low Profile servos |
| Torque Gain per Volt | 17.61%/V More voltage-responsive (torque) than 61% of 115 Digital Low Profile servos |
| Speed Gain per Volt | 7.58%/V More voltage-responsive (speed) than 4% of 117 Digital Low Profile servos |
| Voltage Range Width | 3.6 V Wider voltage range than 77% of 223 Digital Low Profile servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0015 Finer dead band than 54% of 60 Digital Low Profile servos |
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