Servo Overview:
The KST BLS905X Aluminum Brushless Metal Gear High Voltage Tail Servo is a premium servo designed for advanced 3D helicopter aerobatics. It features a durable aluminum housing and solid metal gears, making it incredibly robust for demanding flight conditions. Its compatibility focuses on advanced helicopter pilots who require extreme precision and speed, making it the perfect choice for 550 to 700-class helicopters.
About the Metal Gear HV Servo
Performance & Strength Advantages
The KST BLS905X offers hardened steel gears that provide exceptional durability and strength during intense maneuvers. The CNC aluminum case ensures lightweight yet solid construction, while dual ball bearings guarantee smooth and reliable operation. Thanks to the powerful brushless DC motor and advanced electronics, this servo delivers extreme torque and excellent speed, surpassing its predecessor and making it a higher class than the previous BLS805X (KST-BLS805X – sold separately).
Features:
- Hardened steel gears for durability
- Extreme torque and excellent speed
- CNC aluminum case for long-lasting strength
- Brushless DC motor for powerful performance
- Dual ball bearings for smooth operation
- Ideal for advanced 3D helicopter pilots
Includes:
- (1) BLS905X Aluminum Brushless Metal Gear High Voltage Tail Servo
- Servo Accessories
- Mounting Hardware
Specifications:
| Application | 550-700 Helicopters |
|---|---|
| Input Voltage | 6.0-8.4V |
| Operating Speed @ 6.0V | 0.045sec/60° |
| Operating Speed @ 7.4V | 0.040sec/60° |
| Operating Speed @ 8.4V | 0.035sec/60° |
| Dynamic Torque @ 6.0V | 83.33oz-in (6kg-cm) |
| Dynamic Torque @ 7.4V | 97.22oz-in (7kg-cm) |
| Dynamic Torque @ 8.4V | 111.11oz-in (8kg-cm) |
| Pulse/Frequency | 560Hz |
| Motor Type | Brushless |
| Output Shaft Spline | 25T |
| Gear Material | Hardened Steel |
| Dimensions | 1.59×0.79×1.5in (40.5x20x38mm) |
| Weight | 2.47oz (70g) |
This product was added to our catalog on August 11, 2025
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