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Technical Specifications
Last Updated: 2026-10-10
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | FT846BL |
| Category | Hobby |
| Performance | |
| Torque |
7.4V
555.50 oz-in
40.00 kg-cm
3.9 N-m
6.0V
451.34 oz-in
32.50 kg-cm
3.2 N-m
|
| Speed |
7.4V
0.15 sec/60°
397.4 deg/s
66.2 RPM
6.0V
0.19 sec/60°
324.3 deg/s
54.1 RPM
|
| Running Current |
7.4V0.300 A300 mA |
| Stall Current | 3.5–4.4 A3500–4400 mABelow Average |
| Physical | |
| Weight | 3.23 oz91.5 gBottom 10% |
| Dimensions |
L 1.575 in W 0.787 in H 1.496 in L 40.0 mm W 20.0 mm H 38.0 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Steel |
| Gear Spline/Teeth | 25 T |
| Shaft Size | 5.9 mm |
| Rotation Mode | Positional |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Digital |
| Direction | Counterclockwise |
| Rotational Range | 180° |
| Pulse Width | 500-2500 µs |
| Neutral Position | 1500 µs |
| Dead Band | 4 µs |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 4–8.4 V |
| Temperature | -20–60 °C-4–140 °F |
| Idle Current | 0.006 A6 mA |
| 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 | Bottom 10% Lighter than 1% of 1902 Digital Standard servos |
| Stall Current | Below Average Lower draw than 31% of 539 Digital Standard servos |
Performance Analysis
| Shaft Power | 4.51–6.80 W |
| Power Density | 3.668 W/in³ More power-dense than 68% of 1759 Digital Standard servos |
| Torque Density | 4.9327 oz-in/g |
| Torque-to-Volume Ratio | 243.40 oz-in/in³ |
| Speed-to-Weight | 0.05908 (1/sec·g) |
| Speed-Torque Trade-off | 83.50 |
| Current-per-Torque Ratio | 0.0097 A/oz-in |
| Idle-to-Running Current Ratio | 0.020 |
| No-Load vs Stall Current Spread | 14.67 |
| Voltage Range Width | 4.4 V Wider voltage range than 95% of 1539 Digital Standard servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0020 Finer dead band than 26% of 468 Digital Standard servos |
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