MKS HBL850 Brushless Titanium Gear High Speed High Voltage Digital Cyclic Servo
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The MKS HBL850 is a brushless titanium gear high-speed high-voltage digital cyclic servo. Running on 6.0–8.4V, it delivers 345.79 oz/in (24.9 kg/cm) at 8.4V with a 0.071 sec/60° transit speed — providing the speed, torque, and precision required for demanding RC helicopter cyclic applications.
The brushless motor with indirect-drive potentiometer feedback delivers consistent centering and ultra-fast response. Metal titanium gears provide durability under the sustained high-frequency inputs of cyclic flight. Dual ball bearings ensure smooth, consistent output shaft operation run after run.
Key Features
- Brushless motor for extended service life and consistent performance
- Titanium metal gears for precision and durability
- 345.79 oz/in (24.9 kg/cm) stall torque at 8.4V
- 0.071 sec/60° transit speed at 8.4V — fast cyclic response
- 6.0–8.4V high-voltage operating range
- Dual ball bearings for smooth, consistent operation
- Indirect drive potentiometer for accurate position feedback
- 24.0cm connector wire length
- Standard 40 x 20 x 38.5mm footprint, 73g
Specifications
| Part Number | HBL850 | |
| Operating Voltage | 6.0 – 8.4V DC | |
| Stall Torque (6V) | 18.2 kg/cm — 252 oz/in | |
| Stall Torque (7.4V) | 22.5 kg/cm — 312.46 oz/in | |
| Stall Torque (8.4V) | 24.9 kg/cm — 345.79 oz/in | |
| Speed (6V) | 0.100 sec/60° | |
| Speed (7.4V) | 0.079 sec/60° | |
| Speed (8.4V) | 0.071 sec/60° | |
| Motor Type | Brushless Motor | |
| Gear Type | Titanium Metal Gear | |
| Bearing Type | Dual Ball Bearings | |
| Control System | +Pulse Width Control | |
| Working Frequency | 1520μs / 333Hz | |
| Dead Band | 0.0008ms (default) | |
| Connector Wire Length | 24.0cm (9.4 in) | |
| Dimensions | 40 x 20 x 38.5mm | |
| Weight | 73g | |
| Operating Temp Range | -10°C to +60°C | |
Compatibility
Designed for RC helicopter cyclic applications requiring a high-speed, high-voltage brushless servo. Verify receiver/ESC BEC voltage output and servo bay dimensions before purchasing.