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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | B45BLS |
| Category | Hobby |
| Performance | |
| Torque |
8.4V
201.00 oz-in
14.47 kg-cm
1.4 N-m
7.4V
187.00 oz-in
13.47 kg-cm
1.3 N-m
6.0V
167.00 oz-in
12.03 kg-cm
1.2 N-m
4.8V
139.00 oz-in
10.01 kg-cm
1.0 N-m
Average
|
| Speed |
8.4V
0.06 sec/60°
967.7 deg/s
161.3 RPM
7.4V
0.07 sec/60°
882.4 deg/s
147.1 RPM
6.0V
0.07 sec/60°
810.8 deg/s
135.1 RPM
4.8V
0.09 sec/60°
705.9 deg/s
117.6 RPM
Above Average
|
| Physical | |
| Weight | 1.69 oz48.0 gAbove Average |
| Dimensions |
L 1.58 in W 0.80 in H 1.03 in L 40.1 mm W 20.3 mm H 26.2 mm |
| Case Material | Aluminum / Plastic |
| Drivetrain | |
| Motor Type | Brushless |
| Motor Drive | FET |
| Gears | Steel |
| Gear Spline/Teeth | 25 T |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 180° |
| Mechanical Limit | 220° |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1520 µs |
| Dead Band | 2 µs |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | No |
| Electrical & Environment | |
| Operating Voltage | 4.8–8.4 V |
| Temperature | -15–70 °C5–158 °F |
| Water Rating | IP65 |
| Certification | CE | ROHS | FCC |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 180 mm7.09 in |
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 49% of 186 Digital Low Profile servos at 4.8V |
| Speed | Above Average Faster than 65% of 183 Digital Low Profile servos at 4.8V |
| Weight | Above Average Lighter than 67% of 304 Digital Low Profile servos |
Performance Analysis
| Shaft Power | 3.02–5.99 W |
| Power Density | 4.604 W/in³ More power-dense than 61% of 273 Digital Low Profile servos |
| Torque Density | 2.8958 oz-in/g Stronger than 49% of 185 Digital Low Profile servos |
| Torque-to-Volume Ratio | 106.77 oz-in/in³ Denser torque than 51% of 186 Digital Low Profile servos |
| Speed-to-Weight | 0.24510 (1/sec·g) Faster than 72% of 182 Digital Low Profile servos |
| Speed-Torque Trade-off | 11.81 Better balanced than 39% of 183 Digital Low Profile servos |
| Torque Gain per Volt | 12.39%/V More voltage-responsive (torque) than 28% of 164 Digital Low Profile servos |
| Speed Gain per Volt | 10.30%/V More voltage-responsive (speed) than 19% of 163 Digital Low Profile servos |
| Voltage Range Width | 3.6 V Wider voltage range than 77% of 276 Digital Low Profile servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0010 Finer dead band than 72% of 79 Digital Low Profile servos |
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Weight: 48 grams
Dimensions: 1.6063" x 0.795276" x 1.02756"
Size Class: Low Profile
Reviews (1)
Includes 1 review aggregated from around the web.
There are very few reviews for this servo on the web. One drifter says they really like it for drifting, calling it cheap and great and well behaved with gyros from Onisiki to Futaba. Another driver says it is okay for drifting but would spend the same money on a drift-specific servo.
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