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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | HC1621SG |
| Category | Hobby |
| Performance | |
| Torque |
7.4V
277.70 oz-in
20.00 kg-cm
2.0 N-m
6.0V
222.20 oz-in
16.00 kg-cm
1.6 N-m
Average
|
| Speed |
7.4V
0.09 sec/60°
666.7 deg/s
111.1 RPM
6.0V
0.10 sec/60°
600.0 deg/s
100.0 RPM
Above Average
|
| Running Current |
7.4V
4.000 A
4,000 mA
6.0V
3.300 A
3,300 mA
Bottom 10%
|
| Physical | |
| Weight | 1.87 oz53.0 gAbove Average |
| Dimensions |
L 1.57 in W 0.79 in H 1.46 in L 39.9 mm W 20.1 mm H 37.1 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | Coreless |
| Motor Drive | FET |
| Gears | Steel |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 55° |
| Pulse Width | 1500-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 1 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Temperature | -20–60 °C-4–140 °F |
| 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 | Average Stronger than 51% of 1059 Digital Standard servos at 6.0V |
| Speed | Above Average Faster than 75% of 1044 Digital Standard servos at 6.0V |
| Weight | Above Average Lighter than 80% of 1879 Digital Standard servos |
| Running Current | Bottom 10% Lower draw than 9% of 226 Digital Standard servos at 6.0V |
Performance Analysis
| Torque Density | 4.1925 oz-in/g Stronger than 65% of 1052 Digital Standard servos |
| Torque-to-Volume Ratio | 122.71 oz-in/in³ Denser torque than 53% of 1057 Digital Standard servos |
| Speed-to-Weight | 0.18868 (1/sec·g) Faster than 85% of 1037 Digital Standard servos |
| Speed-Torque Trade-off | 22.22 Better balanced than 39% of 1033 Digital Standard servos |
| Torque Gain per Volt | 17.84%/V More voltage-responsive (torque) than 67% of 872 Digital Standard servos |
| Speed Gain per Volt | 7.94%/V More voltage-responsive (speed) than 8% of 873 Digital Standard servos |
| Voltage Range Width | 1.4 V Wider voltage range than 25% of 1559 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0017 Finer dead band than 37% of 504 Digital Standard servos |
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Weight: 53 grams
Dimensions: 1.57" x 0.79" x 1.48"
Size Class: Standard
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