KST X20 Helicopter Brushless Servo Combo Pack

KST X20 Helicopter Brushless Servo Combo Pack
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Price: $549.99
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The KST X20 V2.0 Helicopter Servo Pack includes three V2.0 X20-2208 Cyclic Servos, and one V2.0 X20-1035 Tail Servo. The X20 Servos feature a brushless motor, full CNC aluminum case, and a complete set of Titanium gears through out each servo. The cyclic servos boast an incredible 347 oz/in (25kg.cm) of torque at 8.4V, and a crisp 0.07 speed. The tail servo offers 166oz/in of torque at a blistering fast 0.03 speed at 8.4V

The developers at KST ensured nothing but the best components were utilized during construction of this servo, components as large as motors and gears, materials for the servo case,and small components such as the PCB board driving the motor. EMF currents in common DC voltage applications can generate large EMF spikes under operation, which can wreak havoc on other connected electronics. X20 servos feature a PCB board which minimizes EMF spikes, protecting other electronics from having to filter out the noise.  

Helicopters from 520mm main blades, to 800mm main blades that accept standard size servos all can utilize these servos. 


  • Standard size aluminum case
  • Low EMF design
  • Full metal gears
  • Dual ball bearings
  • HV compatible

Operating Voltage: 
Size: 40.5x20x38mm (width x height x thickness) 
Torque (Cyclic): 18kg.cm @ 6.0V; 25kg.cm @ 8.4V | 249oz/in @ 6.0V; 350oz/[email protected] 8.4V 
Speed (Cyclic): 0.15sec/60° @ 6.0V; 0.11sec/60° @ 8.4V 
Torque (Tail): 8.5kg.cm @ 6.0V; 12kg.cm @ 8.4V | 117oz/in @ 6.0V; 166oz/[email protected] 8.4V 
Speed (Tail): 0.04sec/60° @ 6.0V; 0.03sec/60° @ 8.4V   
Weight: 75g  
Working Frequency (Cyclic): 1520us/333Hz, 800us - 2200us  
Working Frequency (Tail): 760us/560Hz  

Motor: Brushless  
Ball Bearing: 2BB 

Verified Owner
Tuesday, Sep 15 2020 (2 months ago)
KST X20 Helicopter Brushless Servo Combo Pack
These servos will NOT disappoint!!!
Supersedes my expectations 10x's over.
I also built a xlp550 with the kst 1208.
I would highly recommend KST servos as they are spec'd out with the latest and greatest keeping up with competition
A++ 10 out of 10
Two thumbs up