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Technical Specifications
Last Updated: 2026-10-10
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 1042 Digital Standard servos at 8.4V |
| Speed | Below Average Faster than 23% of 1038 Digital Standard servos at 8.4V |
| Weight | Bottom 10% Lighter than 0% of 1902 Digital Standard servos |
| Stall Current | Below Average Lower draw than 15% of 544 Digital Standard servos |
Performance Analysis
| Torque Density | 6.3402 oz-in/g Stronger than 89% of 1036 Digital Standard servos |
| Torque-to-Volume Ratio | 279.93 oz-in/in³ Denser torque than 93% of 1041 Digital Standard servos |
| Speed-to-Weight | 0.06394 (1/sec·g) Faster than 3% of 1031 Digital Standard servos |
| Speed-Torque Trade-off | 99.17 Better balanced than 95% of 1028 Digital Standard servos |
| Current-per-Torque Ratio | 0.0103 A/oz-in More efficient than 77% of 316 Digital Standard servos |
| Torque Gain per Volt | 12.19%/V More voltage-responsive (torque) than 29% of 847 Digital Standard servos |
| Speed Gain per Volt | 6.50%/V More voltage-responsive (speed) than 4% of 865 Digital Standard servos |
| Voltage Range Width | 8.4 V Wider voltage range than 99% of 1546 Digital Standard servos |
Notes
Also comes in a RS-485 & CAN control system.
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