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Technical Specifications
Last Updated: 2026-11-05
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | HD-1440A |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
11.11 oz-in
0.80 kg-cm
0.1 N-m
4.8V
8.33 oz-in
0.60 kg-cm
0.1 N-m
Average
|
| Speed |
6.0V
0.10 sec/60°
600.0 deg/s
100.0 RPM
4.8V
0.12 sec/60°
500.0 deg/s
83.3 RPM
Average
|
| Running Current |
6.0V
0.110 A
110 mA
4.8V
0.100 A
100 mA
|
| Stall Current | 0.27–0.32 A270–320 mAAbove Average |
| Physical | |
| Weight | 0.16 oz4.4 gAverage |
| Dimensions |
L 0.79 in W 0.33 in H 0.33 in L 20.1 mm W 8.4 mm H 8.4 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Plastic |
| Gear Spline/Teeth | 20 T estimate |
| Rotation/Support | Bushing |
| Control & Signal | |
| Modulation | Analog |
| Direction | Counterclockwise |
| Rotational Range | 165° |
| Mechanical Limit | 180° |
| Pulse Cycle | 20 ms |
| Pulse Width | 800-2200 µs |
| Neutral Position | 1520 µs |
| Dead Band | 4 µs |
| Refresh Rate | 50 Hz |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Temperature | -10–50 °C14–122 °F |
| Idle Current | 0.005 A5 mA |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 100 mm3.94 in |
| Origin | |
| Country of Origin | Poland |
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 29 Analog Nano servos at 4.8V |
| Speed | Average Faster than 50% of 29 Analog Nano servos at 4.8V |
| Weight | Average Lighter than 41% of 67 Analog Nano servos |
| Stall Current | Above Average Lower draw than 70% of 51 Nano servos |
Performance Analysis
| Shaft Power | 0.13–0.21 W |
| Power Density | 2.388 W/in³ More power-dense than 92% of 66 Analog Nano servos |
| Torque Density | 1.8932 oz-in/g Stronger than 50% of 29 Analog Nano servos |
| Torque-to-Volume Ratio | 96.83 oz-in/in³ 5th-highest torque-to-volume ratio of 29 Analog Nano servos |
| Speed-to-Weight | 1.89394 (1/sec·g) Faster than 32% of 29 Analog Nano servos |
| Speed-Torque Trade-off | 1.00 Better balanced than 54% of 29 Analog Nano servos |
| Current-per-Torque Ratio | 0.0384 A/oz-in More efficient than 14% of 22 Power HD servos |
| Idle-to-Running Current Ratio | 0.050 Lower idle draw than 50% of 333 Hobby servos |
| No-Load vs Stall Current Spread | 3.20 Narrower current spread than 90% of 350 Hobby servos |
| Torque Gain per Volt | 27.81%/V 3rd-highest torque gain per volt of 77 Power HD servos |
| Speed Gain per Volt | 16.67%/V More voltage-responsive (speed) than 58% of 78 Power HD servos |
| Voltage Range Width | 1.2 V Wider voltage range than 60% of 41 Analog Nano servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0029 Finer dead band than 28% of 40 Nano servos |
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