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KST X20-1806 Brushless Low-profile Servo 18Kgf.cm 0.06sec
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KST X20-1806 Brushless Low-profile Servo 18Kgf.cm 0.06sec
The KST X20-1806 Brushless Low-profile Servo is a high-speed low-profile HV servo for 1:10 RC touring, drift, and off-road buggy applications. KST also positions the low-profile body for high-performance airplanes and jets where a slim servo can fit better than a standard-height unit.
Verified KST data lists a DC 6.0V-8.4V voltage range, 18Kgf.cm torque at 8.4V, and 0.06sec/60deg speed at 8.4V. The servo uses a 4-pole brushless DC motor, hardened steel gears, contactless position sensing, a CNC aluminum case, and 2 ball bearings.
With a 40.5 x 20 x 23.1mm low-profile case, IP65 splash-proof rating, and 25T 6mm spline, X20-1806 is designed for steering and control systems that need compact height, fast response, and strong torque.
Product Images
Features
- Low-profile X20 servo - Fits chassis and aircraft spaces that need a 23.1mm-height servo.
- 18Kgf.cm torque - Listed torque reaches 18Kgf.cm at 8.4V.
- 0.06sec high-speed response - Listed speed reaches 0.06sec/60deg at 8.4V.
- 4-pole brushless DC motor - Supports fast response and high efficiency.
- Contactless position sensor - Listed in the KST technical specification for this model.
- IP65 splash-proof rating - Suitable for compatible RC use where splash resistance is needed.
- Hardened steel gears - Adds drivetrain durability for steering and control loads.
- CNC aluminum case - Provides stiffness and heat dissipation.
- 25T 6mm output spline - Uses the listed standard-size spline.
- Programmable setup - KST lists soft start and programmable support.
Specifications
| Parameter | Value |
|---|---|
| Model | KST X20-1806 |
| Shopify SKU | KST-X20-1806 |
| Rated Voltage | DC 7.4V |
| Voltage Range | DC 6.0V-8.4V |
| Torque | 14Kgf.cm @ 6.0V; 16Kgf.cm @ 7.4V; 18Kgf.cm @ 8.4V |
| Speed | 0.08sec/60deg @ 6.0V; 0.07sec/60deg @ 7.4V; 0.06sec/60deg @ 8.4V |
| Start Current | 4.0A @ 6.0V; 4.8A @ 7.4V; 5.8A @ 8.4V |
| Working Frequency | 1520us / 333Hz |
| Default Travel Angle | +/-100deg = 200deg total |
| Command Interface | PWM command; pulse length 500us-2500us |
| Output Shaft Spline | 25T, 6mm |
| Case Material | Aluminum alloy |
| Motor Type | 4-pole brushless DC motor |
| Gear Set Material | Hardened steel |
| Position Sensor | Contactless |
| Ball Bearing | 2BB |
| Waterproof Rating | IP65 |
| Case Dimensions | 40.5 x 20 x 23.1mm +/-0.2mm |
| Weight | 50g +/-10% |
| Temperature Range | -20C to +65C |
| Soft Start | Yes |
| Programmable | Yes |
Reference Documents
Application
- RC touring and drift cars - Designed for fast steering response in compatible 1:10 platforms.
- Off-road buggy and truggy builds - Suitable when the servo dimensions, torque, speed, and voltage match the chassis.
- Aerobatic airplanes and jets - Can be used in aircraft control systems after confirming load, travel, and fit.
- High-speed steering upgrades - Useful where fast 60deg response and metal gears are required.
- HV receiver systems - Works with compatible DC 6.0V-8.4V power systems.
- PWM-controlled mechanisms - Can drive compact mechanisms using the listed PWM command interface.
Packing List
| Description | Quantity |
|---|---|
| KST X20-1806 brushless servo | 1 |
| Accessory pack | 1 |
FAQ
How does X20-1806 compare with X20-3005?
X20-1806 is the low-profile option with a 40.5 x 20 x 23.1mm case, 18Kgf.cm at 8.4V, and 0.06sec/60deg speed. X20-3005 is a standard-height servo with 32Kgf.cm at 8.4V and 0.047sec/60deg speed.
Does OpenELAB list multiple Shopify variants for this product?
No. The current Shopify product is a single variant with SKU KST-X20-1806.
What is the maximum listed torque?
The technical specification lists 18Kgf.cm at 8.4V.
What is the fastest listed speed?
The fastest listed speed is 0.06sec/60deg at 8.4V.
Is it waterproof?
The KST technical specification lists IP65, which indicates splash-proof protection rather than full submersion.
What is included in the package?
The package listing confirms one X20-1806 brushless servo and one accessory pack.
What spline does it use?
The technical specification lists a 25T, 6mm output shaft spline.
What should I check before installation?
Confirm the low-profile 40.5 x 20 x 23.1mm case, 25T 6mm spline, voltage range, travel, and chassis or servo-bay clearance.
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