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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | HB1621SG |
| Category | Hobby |
| Performance | |
| Torque |
7.4V
263.90 oz-in
19.00 kg-cm
1.9 N-m
6.0V
208.30 oz-in
15.00 kg-cm
1.5 N-m
Average
|
| Speed |
7.4V
0.07 sec/60°
857.1 deg/s
142.9 RPM
6.0V
0.09 sec/60°
705.9 deg/s
117.6 RPM
Above Average
|
| Running Current |
7.4V
3.800 A
3,800 mA
6.0V
3.300 A
3,300 mA
Below Average
|
| 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 | Brushless |
| Motor Drive | FET |
| Gears | Metal |
| Rotation Mode | Standard |
| 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 47% of 1040 Digital Standard servos at 6.0V |
| Speed | Above Average Faster than 84% of 1036 Digital Standard servos at 6.0V |
| Weight | Above Average Lighter than 79% of 1903 Digital Standard servos |
| Running Current | Below Average Lower draw than 13% of 176 Digital Standard servos at 6.0V |
Performance Analysis
| Torque Density | 3.9302 oz-in/g Stronger than 59% of 1034 Digital Standard servos |
| Torque-to-Volume Ratio | 115.03 oz-in/in³ Denser torque than 50% of 1039 Digital Standard servos |
| Speed-to-Weight | 0.22198 (1/sec·g) Faster than 88% of 1029 Digital Standard servos |
| Speed-Torque Trade-off | 17.71 Better balanced than 31% of 1026 Digital Standard servos |
| Torque Gain per Volt | 19.07%/V More voltage-responsive (torque) than 74% of 845 Digital Standard servos |
| Speed Gain per Volt | 15.30%/V More voltage-responsive (speed) than 49% of 864 Digital Standard servos |
| Voltage Range Width | 1.4 V Wider voltage range than 25% of 1546 Digital Standard servos |
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Weight: 53 grams
Dimensions: 1.57" x 0.79" x 1.48"
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