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Technical Specifications
Last Updated: 2026-10-23
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | BH815S |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
208.30 oz-in
15.00 kg-cm
1.5 N-m
7.4V
180.50 oz-in
13.00 kg-cm
1.3 N-m
6.0V
138.80 oz-in
9.99 kg-cm
1.0 N-m
Average
|
| Speed |
8.4V
0.05 sec/60°
1,200.0 deg/s
200.0 RPM
7.4V
0.06 sec/60°
1,090.9 deg/s
181.8 RPM
6.0V
0.07 sec/60°
923.1 deg/s
153.8 RPM
Top 10%
|
| Running Current |
8.4V
0.400 A
400 mA
7.4V
0.300 A
300 mA
6.0V
0.200 A
200 mA
Average
|
| Stall Current | 2.6–3.1 A2600–3100 mAAbove Average |
| Physical | |
| Weight | 1.83 oz52.0 gAverage |
| Dimensions |
L 1.61 in W 0.79 in H 1.04 in L 40.9 mm W 20.1 mm H 26.4 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Titanium / Aluminum |
| Gear Spline/Teeth | 25 T estimate |
| Rotation Mode | Positional |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 180° |
| Mechanical Limit | 180° |
| Pulse Cycle | 3.03 ms |
| Pulse Width | 800-2200 µs |
| Neutral Position | 1500 µs |
| Dead Band | 2 µs |
| Refresh Rate | 330 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | Yes |
| Electrical & Environment | |
| Operating Voltage | 6–8.4 V |
| Temperature | -10–60 °C14–140 °F |
| Idle Current | 0.009 A9 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 180 mm7.09 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 | Average Stronger than 38% of 186 Digital Low Profile servos at 6.0V |
| Speed | Top 10% Faster than 93% of 183 Digital Low Profile servos at 6.0V |
| Weight | Average Lighter than 50% of 304 Digital Low Profile servos |
| Running Current | Average Lower draw than 54% of 27 Digital Low Profile servos at 6.0V |
| Stall Current | Above Average Lower draw than 66% of 81 Digital Low Profile servos |
Performance Analysis
| Shaft Power | 3.95–7.70 W |
| Power Density | 5.823 W/in³ More power-dense than 74% of 273 Digital Low Profile servos |
| Torque Density | 2.6692 oz-in/g Stronger than 41% of 185 Digital Low Profile servos |
| Torque-to-Volume Ratio | 104.93 oz-in/in³ Denser torque than 49% of 186 Digital Low Profile servos |
| Speed-to-Weight | 0.29586 (1/sec·g) Faster than 92% of 182 Digital Low Profile servos |
| Speed-Torque Trade-off | 9.02 Better balanced than 20% of 183 Digital Low Profile servos |
| Current-per-Torque Ratio | 0.0223 A/oz-in More efficient than 42% of 58 Digital Low Profile servos |
| Idle-to-Running Current Ratio | 0.045 Lower idle draw than 53% of 333 Hobby servos |
| No-Load vs Stall Current Spread | 15.50 Narrower current spread than 68% of 20 Low Profile servos |
| Torque Gain per Volt | 20.86%/V More voltage-responsive (torque) than 85% of 164 Digital Low Profile servos |
| Speed Gain per Volt | 12.50%/V More voltage-responsive (speed) than 36% of 163 Digital Low Profile servos |
| Voltage Range Width | 2.4 V Wider voltage range than 41% of 276 Digital Low Profile servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0014 Finer dead band than 59% of 79 Digital Low Profile servos |
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Weight: 53 grams
Dimensions: 1.61" x 0.79" x 1.04"
Size Class: Low Profile
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