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Technical Specifications
Last Updated: 2026-10-09
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | BH125W |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
1,735.90 oz-in
125.00 kg-cm
12.3 N-m
7.4V
1,527.60 oz-in
110.00 kg-cm
10.8 N-m
6.0V
1,249.90 oz-in
90.00 kg-cm
8.8 N-m
Above Average
|
| Speed |
8.4V
0.09 sec/60°
705.9 deg/s
117.6 RPM
7.4V
0.11 sec/60°
545.5 deg/s
90.9 RPM
6.0V
0.12 sec/60°
500.0 deg/s
83.3 RPM
Top 10%
|
| Running Current |
8.4V
0.600 A
600 mA
7.4V
0.500 A
500 mA
6.0V
0.400 A
400 mA
Average
|
| Stall Current | 9.4–13 A9400–13000 mABelow Average |
| Physical | |
| Weight | 7.37 oz209.0 gAverage |
| Dimensions |
L 2.34 in W 1.16 in H 2.15 in L 59.4 mm W 29.5 mm H 54.6 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Steel |
| Gear Spline/Teeth | 15 T |
| Shaft Size | 7.6 mm |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Clockwise |
| Rotational Range | 180° |
| Mechanical Limit | 250° |
| Pulse Cycle | 3 ms |
| Pulse Width | 900-2100 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -10–60 °C14–140 °F |
| Water Rating | Waterproof |
| Idle Current | 0.050 A50 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 350 mm13.78 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
| Torque | Above Average Stronger than 74% of 93 Digital Giant servos at 6.0V |
| Speed | Top 10% Faster than 93% of 90 Digital Giant servos at 6.0V |
| Weight | Average Lighter than 46% of 174 Digital Giant servos |
| Running Current | Average Lower draw than 61% of 29 Digital Giant servos at 6.0V |
| Stall Current | Below Average Lower draw than 27% of 102 Digital Giant servos |
Performance Analysis
| Shaft Power | 19.26–37.76 W |
| Power Density | 6.470 W/in³ 2nd-highest power density of 132 Digital Giant servos |
| Torque Density | 5.9804 oz-in/g Stronger than 84% of 90 Digital Giant servos |
| Torque-to-Volume Ratio | 214.17 oz-in/in³ Denser torque than 89% of 93 Digital Giant servos |
| Speed-to-Weight | 0.03987 (1/sec·g) Faster than 92% of 87 Digital Giant servos |
| Speed-Torque Trade-off | 149.99 Better balanced than 56% of 89 Digital Giant servos |
| Current-per-Torque Ratio | 0.0104 A/oz-in More efficient than 29% of 50 Digital Giant servos |
| Idle-to-Running Current Ratio | 0.125 Lower idle draw than 32% of 23 Giant servos |
| No-Load vs Stall Current Spread | 32.50 Narrower current spread than 31% of 27 Digital Giant servos |
| Torque Gain per Volt | 16.20%/V More voltage-responsive (torque) than 61% of 65 Digital Giant servos |
| Speed Gain per Volt | 17.16%/V More voltage-responsive (speed) than 86% of 65 Digital Giant servos |
| Voltage Range Width | 2.4 V Wider voltage range than 37% of 160 Digital Giant servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0017 Finer dead band than 34% of 36 Digital Giant servos |
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