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Technical Specifications
Last Updated: 2026-10-23
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | BMS-621DMG+HS |
| Category | Hobby |
| Performance | |
| Torque |
6.0V
100.01 oz-in
7.20 kg-cm
0.7 N-m
4.8V
88.90 oz-in
6.40 kg-cm
0.6 N-m
Below Average
|
| Speed |
6.0V
0.10 sec/60°
600.0 deg/s
100.0 RPM
4.8V
0.13 sec/60°
461.5 deg/s
76.9 RPM
Average
|
| Physical | |
| Weight | 1.80 oz51.0 gAbove Average |
| Dimensions |
L 1.594 in W 0.787 in H 1.496 in L 40.5 mm W 20.0 mm H 38.0 mm |
| Drivetrain | |
| Motor Type | 3-pole |
| Motor Drive | MOS |
| Gears | Metal |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Control System | Digital Controller |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Water Rating | Waterproof |
| Certification | CE |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Origin | |
| Country of Origin | Taiwan |
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 14% of 1059 Digital Standard servos at 4.8V |
| Speed | Average Faster than 56% of 1044 Digital Standard servos at 4.8V |
| Weight | Above Average Lighter than 85% of 1879 Digital Standard servos |
Performance Analysis
| Shaft Power | 1.26–1.85 W |
| Power Density | 0.985 W/in³ More power-dense than 17% of 1767 Digital Standard servos |
| Torque Density | 1.7431 oz-in/g Stronger than 16% of 1052 Digital Standard servos |
| Torque-to-Volume Ratio | 47.37 oz-in/in³ Denser torque than 13% of 1057 Digital Standard servos |
| Speed-to-Weight | 0.15083 (1/sec·g) Faster than 73% of 1037 Digital Standard servos |
| Speed-Torque Trade-off | 11.56 Better balanced than 15% of 1033 Digital Standard servos |
| Torque Gain per Volt | 10.41%/V More voltage-responsive (torque) than 20% of 872 Digital Standard servos |
| Speed Gain per Volt | 25.01%/V More voltage-responsive (speed) than 94% of 873 Digital Standard servos |
| Voltage Range Width | 1.2 V Wider voltage range than 10% of 1559 Digital Standard servos |
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