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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | BL1028HV |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
347.25 oz-in
25.00 kg-cm
2.5 N-m
7.4V
291.69 oz-in
21.00 kg-cm
2.1 N-m
6.0V
236.13 oz-in
17.00 kg-cm
1.7 N-m
5.0V
222.24 oz-in
16.00 kg-cm
1.6 N-m
Average
|
| Speed |
8.4V0.08 sec/60°750.0 deg/s125.0 RPM |
| Stall Current | 2.2–3.6 A2200–3600 mAAverage |
| Physical | |
| Weight | 2.89 oz82.0 gBottom 10% |
| Dimensions |
L 1.575 in W 0.827 in H 1.496 in L 40.0 mm W 21.0 mm H 38.0 mm |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Metal |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 40° |
| Neutral Position | 1500 µs |
| Dead Band | 1 µs |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 5–8.4 V |
| Temperature | -20–60 °C-4–140 °F |
| Water Rating | IP68 |
| Idle Current | 0.044 A44 mA |
| Connectivity | |
| Connector | JR (Universal) estimate |
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 52% of 1060 Digital Standard servos at 5.0V |
| Weight | Bottom 10% Lighter than 8% of 1880 Digital Standard servos |
| Stall Current | Average Lower draw than 42% of 570 Digital Standard servos |
Performance Analysis
| Shaft Power | 8.03 W |
| Power Density | 4.120 W/in³ More power-dense than 72% of 1768 Digital Standard servos |
| Torque Density | 2.7102 oz-in/g Stronger than 37% of 1053 Digital Standard servos |
| Torque-to-Volume Ratio | 114.09 oz-in/in³ Denser torque than 51% of 1058 Digital Standard servos |
| Speed-to-Weight | 0.15244 (1/sec·g) |
| Speed-Torque Trade-off | 17.78 |
| Current-per-Torque Ratio | 0.0162 A/oz-in More efficient than 45% of 331 Digital Standard servos |
| Torque Gain per Volt | 16.54%/V More voltage-responsive (torque) than 56% of 873 Digital Standard servos |
| Voltage Range Width | 3.4 V Wider voltage range than 72% of 1560 Digital Standard servos |
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