Servo drive KST X15-755X
Rated voltage: 7.4V DC
USD · Volume pricing available
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Buy KST X15-755X High Speed Servo for your Drone or RC Model!
Give your tail rotor lightning-fast response and precision control. The KST X15-755X servo is specifically designed for use as a tail servo on RC helicopters with rotor blades ranging from 325mm to 425mm . The device features extremely fast speed and high torque, which is critical for maintaining a stable tail and performing complex 3D aerobatic maneuvers . Rugged CNC aluminum housing efficiently dissipates heat and provides rigidity to the structure.
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Lightning speed. Just 0.04 seconds per 60 degrees at 8.4V provides instant tail response.
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High torque. A force of up to 10.2 kg/cm at 8.4V confidently holds the tail even under extreme loads.
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Premium Coreless motor. The high-precision coreless motor guarantees fast starting, smoothness and excellent handling.
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Maximum reliability. Hardened steel gears and double ball bearings ensure long service life.
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Narrow pulse compatible. Works with a 760μs/560Hz signal, optimized for modern clipless stabilization systems.
Operating principle and design
The KST X15-755X is a digital HV servo drive specially designed for precise control of helicopter tail rotor . It uses a narrow 760 µs control pulse at 560 Hz, which provides the ultra-fast response required to compensate for main rotor torque . The servo drive is based on a coreless electric motor, which differs from conventional brushed motors in having much lower rotor inertia. This allows it to accelerate and decelerate almost instantly, providing exceptional positioning accuracy.
The servo drive body is made of aluminum alloy using high-precision CNC machining. This not only gives it strength and rigidity, but also turns the case into an effective heat sink, dissipating heat away from the internal components. The hardened steel gearbox ensures durability and shock resistance, while two precision ball bearings ensure smooth operation and minimal output shaft play .
Specifications and installation
| Characteristics | Meaning |
|---|---|
| Dimensions (L×W×H) | 35.5 × 15 × 32.5 mm |
| Weight | 40 g |
| Operating voltage | 6.0 – 8.4 V |
| Operating frequency | 760 µs / 560 Hz |
| Torque @6.0V | 7.2 kg cm |
| Torque @7.4V | 9.0 kg cm |
| Torque @8.4V | 10.2 kg cm |
| Speed (60°) @6.0V | 0.06 sec |
| Speed (60°) @7.4V | 0.05 sec |
| Speed (60°) @8.4V | 0.04 sec |
| Engine type | Coreless |
| Gear material | Hardened steel |
| Bearings | Double ball bearings |
| Housing material | Aluminum (CNC) |
| Temperature range | -10 to +65 °C |
This servo is an ideal choice for 380-420 class helicopters such as Goblin 380/420, Gaui NX5 and other models requiring a fast and powerful tail engine. Thanks to its characteristics, it will provide you with confident control and allow you to perform the most complex aerobatics. The servo drive comes with all the necessary rockers and fasteners for installation.
Specifications
- Rated voltage: 7.4V DC
- Voltage range: 6.0-8.4V
- Torque:
- 7.2 kg cm at 6.0 V
- 9.0 kg cm at 7.4 V
- 10.2 kg cm at 8.4 V
- Rotation speed:
- 0.06 s / 60° at 6.0 V
- 0.05 s / 60° at 7.4 V
- 0.04 s / 60° at 8.4 V
- Dimensions: 35.5 × 15 × 32.5 mm
- Weight: 40 g.
