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Technical Specifications
Last Updated: 2026-10-10
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 |
| Neutral Position | 1500 µs |
| 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 50% of 1041 Digital Standard servos at 6.0V |
| Speed | Above Average Faster than 73% of 1038 Digital Standard servos at 6.0V |
| Weight | Above Average Lighter than 79% of 1903 Digital Standard servos |
| Running Current | Bottom 10% Lower draw than 10% of 174 Digital Standard servos at 6.0V |
Performance Analysis
| Torque Density | 4.1925 oz-in/g Stronger than 64% of 1034 Digital Standard servos |
| Torque-to-Volume Ratio | 122.71 oz-in/in³ Denser torque than 52% of 1040 Digital Standard servos |
| Speed-to-Weight | 0.18868 (1/sec·g) Faster than 83% of 1030 Digital Standard servos |
| Speed-Torque Trade-off | 22.22 Better balanced than 40% of 1029 Digital Standard servos |
| Torque Gain per Volt | 17.84%/V More voltage-responsive (torque) than 68% of 845 Digital Standard servos |
| Speed Gain per Volt | 7.94%/V More voltage-responsive (speed) than 9% of 866 Digital Standard servos |
| Voltage Range Width | 1.4 V Wider voltage range than 25% of 1540 Digital Standard servos |
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Weight: 53 grams
Dimensions: 1.57" x 0.79" x 1.48"
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