MKS HBL550 X5 Brushless Metal Gear High Torque High Voltage Digital Servo
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The MKS HBL550 is a brushless metal gear high-torque high-voltage digital servo with X5 spline output. Running on 3.5–8.4V (2S LiPo unregulated), it delivers up to 527 oz/in at 8.4V with a 0.085 sec/60° transit speed — a powerful, fast servo for 1/10 and 1/8 scale surface RC and large-scale aircraft applications.
The brushless motor eliminates brush wear for longer service life and consistent performance. Metal alloy gears provide robust torque transfer under sustained high-load use. Dual ball bearings ensure smooth, consistent output shaft operation run after run.
Key Features
- Brushless motor for extended service life and consistent performance
- Metal alloy gears for robust torque transfer and durability
- 527 oz/in stall torque at 8.4V
- 0.085 sec/60° transit speed at 8.4V
- 3.5–8.4V operating range (2S LiPo unregulated compatible)
- Dual ball bearings (2BB)
- Compact 40 x 20 x 38.5mm footprint, 79.5g
Specifications
| Part Number | HBL550 | |
| Operating Voltage | 3.5 – 8.4V DC (2S LiPo unregulated) | |
| Stall Torque (6.0V) | 402 oz/in | |
| Stall Torque (7.4V) | 499 oz/in | |
| Stall Torque (8.4V) | 527 oz/in | |
| Speed (6.0V) | 0.117 sec/60° | |
| Speed (7.4V) | 0.094 sec/60° | |
| Speed (8.4V) | 0.085 sec/60° | |
| Motor Type | Brushless Motor | |
| Gear Type | Metal Alloy Gear | |
| Bearing Type | Dual Ball Bearings (2BB) | |
| Working Frequency | 1520μs / 333Hz | |
| Dead Band | 0.001ms (default) | |
| Dimensions | 40 x 20 x 38.5mm | |
| Weight | 79.5g | |
Compatibility
Suitable for 1/10 and 1/8 scale surface RC vehicles and large-scale aircraft requiring a high-voltage brushless servo. Compatible with 2S LiPo unregulated power. Verify receiver/ESC BEC voltage output and servo bay dimensions before purchasing.