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Technical Specifications
Last Updated: 2026-10-26
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | MIBL-W21A-4108SG |
| Category | Hobby |
| Performance | |
| Torque |
7.4V
569.49 oz-in
41.01 kg-cm
4.0 N-m
6.0V
444.48 oz-in
32.01 kg-cm
3.1 N-m
|
| Speed |
7.4V
0.08 sec/60°
750.0 deg/s
125.0 RPM
6.0V
0.11 sec/60°
545.5 deg/s
90.9 RPM
|
| Stall Current | 4–5 A4000–5000 mABelow Average |
| Physical | |
| Weight | 2.82 oz80.0 gBelow Average |
| Dimensions |
L 1.59 in W 0.83 in H 1.48 in L 40.4 mm W 21.1 mm H 37.6 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Steel |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 60° |
| Mechanical Limit | 120° |
| Pulse Cycle | 3.003 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1500 µs |
| Dead Band | 1 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Induction Encoder |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4.5–8.5 V |
| Temperature | -20–70 °C-4–158 °F |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 300 mm11.81 in |
| Origin | |
| Country of Origin | China |
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
| Weight | Below Average Lighter than 11% of 1880 Digital Standard servos |
| Stall Current | Below Average Lower draw than 25% of 570 Digital Standard servos |
Performance Analysis
| Shaft Power | 7.47–13.16 W |
| Power Density | 6.739 W/in³ More power-dense than 90% of 1768 Digital Standard servos |
| Torque Density | 5.5560 oz-in/g |
| Torque-to-Volume Ratio | 227.57 oz-in/in³ |
| Speed-to-Weight | 0.11364 (1/sec·g) |
| Speed-Torque Trade-off | 48.89 |
| Current-per-Torque Ratio | 0.0112 A/oz-in |
| Voltage Range Width | 4.0 V Wider voltage range than 90% of 1560 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0008 Finer dead band than 87% of 504 Digital Standard servos |
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