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BLS805X HV Brushless Tail Servo 7.5Kgf.cm 0.039sec for Heli 550-700
BR0023.0043
$79.99
KST BLS805X Brushless Helicopter Servo
The KST BLS805X is a high-performance brushless servo designed for demanding 3D helicopter aerobatics. Its robust aluminum housing and solid metal geartrain provide the durability and rigidity needed for fast and precise control.
With high positioning speed and excellent return-to-center accuracy, the BLS805X delivers responsive and consistent control during aggressive maneuvers. Its 760μs neutral pulse and support for frequencies up to 560Hz enable fast signal response for demanding helicopter setups.
Combining high-speed positioning, precise centering, and rugged metal construction, the BLS805X is a strong choice for pilots looking for accurate and responsive servo performance in 3D helicopter applications.

Features
- Extreme Torque and Excellent Speed
- CNC Aluminium Case
- Brushless DC Motor
- Dual Ball Bearings
- Ideal for Heli 550-700
Specification
| Parameter | Value |
| Item | BLS805X HV Brushless Tail Servo |
| Operating Voltage | DC6.0V-8.4V |
| Dimension | 40.5mm × 20mm × 38mm ±0.2mm |
| Torque | 5.5Kgf.cm@6.0V / 6.5Kgf.cm@7.4V / 7.5Kgf.cm@8.4V |
| Speed | 0.048sec/60°@6.0V / 0.042sec/60°@7.4V / 0.039sec/60°@8.4V |
| Working Frequency | 760μs/560Hz |
| Temperature Range | -10℃ ~ +65℃ |
| Case Material | Aluminum Alloy |
| Motor Type | Brushless DC Motor |
| Position Sensor | Potentiometer |
| Ball Bearing | 2BB |
| Weight | 70g ±10% |
Package Includes
- 1 * BLS805X HV Servo
- 5 * Plastic Servo Horn
- 1 * Servo Horn Screw
- 4 * Rubber Grommet
- 4 * Eyelet
- 4 * Mounting Screw
