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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | HD-1550A |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
12.50 oz-in
0.90 kg-cm
0.1 N-m
4.8V
15.30 oz-in
1.10 kg-cm
0.1 N-m
Below 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
Above Average
|
| Physical | |
| Weight | 0.19 oz5.5 gAbove Average |
| Dimensions |
L 0.83 in W 0.77 in H 0.79 in L 21.1 mm W 19.6 mm H 20.1 mm |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Plastic |
| Gear Spline/Teeth | 24 T estimate |
| Rotation/Support | Bushing |
| Control & Signal | |
| Modulation | Analog |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| 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 | Below Average Stronger than 30% of 160 Analog Micro servos at 4.8V |
| Speed | Above Average Faster than 67% of 160 Analog Micro servos at 4.8V |
| Weight | Above Average Lighter than 83% of 336 Analog Micro servos |
Performance Analysis
| Shaft Power | 0.23–0.24 W |
| Power Density | 0.467 W/in³ More power-dense than 9% of 322 Analog Micro servos |
| Torque Density | 2.7818 oz-in/g Stronger than 94% of 160 Analog Micro servos |
| Torque-to-Volume Ratio | 30.30 oz-in/in³ Denser torque than 9% of 160 Analog Micro servos |
| Speed-to-Weight | 1.51515 (1/sec·g) Faster than 86% of 160 Analog Micro servos |
| Speed-Torque Trade-off | 1.84 Better balanced than 29% of 159 Analog Micro servos |
| Torque Gain per Volt | -15.25%/V More voltage-responsive (torque) than 0% of 101 Analog Micro servos |
| Speed Gain per Volt | 16.67%/V More voltage-responsive (speed) than 57% of 101 Analog Micro servos |
| Voltage Range Width | 1.2 V Wider voltage range than 73% of 174 Analog Micro servos |
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Reviews (1)
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P3tras
September 18, 2011Application(s): Small foamies
Comments: I didn't like this servo. Really low torque, not precise, a lot of slop in the gear train. Stay away!