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Technical Specifications
Last Updated: 2026-10-25
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | OCS-851BL |
| Category | Hobby |
| Performance | |
| Torque |
16.8V
1,180.40 oz-in
85.00 kg-cm
8.3 N-m
8.4V
583.30 oz-in
42.00 kg-cm
4.1 N-m
Top 10%
|
| Speed |
16.8V
0.11 sec/60°
545.5 deg/s
90.9 RPM
8.4V
0.17 sec/60°
352.9 deg/s
58.8 RPM
Below Average
|
| Stall Current | 4–6 A4000–6000 mABelow Average |
| Physical | |
| Weight | 3.25 oz92.0 gBottom 10% |
| Dimensions |
L 1.57 in W 0.79 in H 1.68 in L 39.9 mm W 20.1 mm H 42.7 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Brushless |
| Gears | Metal |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Refresh Rate | 333 Hz |
| Angle Sensor | Magnetic Encoder |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 8.4–16.8 V |
| Temperature | -10–60 °C14–140 °F |
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 | Top 10% Stronger than 95% of 1059 Digital Standard servos at 8.4V |
| Speed | Below Average Faster than 24% of 1044 Digital Standard servos at 8.4V |
| Weight | Bottom 10% Lighter than 1% of 1879 Digital Standard servos |
| Stall Current | Below Average Lower draw than 15% of 570 Digital Standard servos |
Performance Analysis
| Torque Density | 6.3402 oz-in/g Stronger than 90% of 1052 Digital Standard servos |
| Torque-to-Volume Ratio | 279.93 oz-in/in³ Denser torque than 94% of 1057 Digital Standard servos |
| Speed-to-Weight | 0.06394 (1/sec·g) Faster than 4% of 1037 Digital Standard servos |
| Speed-Torque Trade-off | 99.17 Better balanced than 96% of 1033 Digital Standard servos |
| Current-per-Torque Ratio | 0.0103 A/oz-in More efficient than 78% of 331 Digital Standard servos |
| Torque Gain per Volt | 12.19%/V More voltage-responsive (torque) than 30% of 872 Digital Standard servos |
| Speed Gain per Volt | 6.50%/V More voltage-responsive (speed) than 3% of 873 Digital Standard servos |
| Voltage Range Width | 8.4 V Wider voltage range than 99% of 1559 Digital Standard servos |
Notes
Also comes in a RS-485 & CAN control system.
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