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KST X20-4208
Standard

KST X20-4208

Compatible Hardware

*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-07-28
Identity
Brand KST
Product Number (add)
Category Hobby
Performance
Torque
8.4V 638.48 oz-in
7.4V 582.96 oz-in
6.0V 527.44 oz-in
Speed
8.4V 0.07 sec/60°
7.4V 0.08 sec/60°
6.0V 0.10 sec/60°
Running Current (add)
Stall Current (add)
Physical
Weight 2.82 oz
Dimensions L 1.57 in
W 0.79 in
H 1.57 in
Case Material (add)
Drivetrain
Motor Type Brushless
Motor Drive (add)
Gears Steel
Gear Spline/Teeth 25 T estimate
Shaft Size (add)
Rotation Mode (add)
Rotation/Support 6
Backlash (add)
Control & Signal
Modulation Digital
Direction (add)
Rotational Range 200°
Mechanical Limit (add)
Pulse Cycle (add)
Pulse Width (add)
Neutral Position 1520 µs
Dead Band (add)
Refresh Rate (add)
Angle Sensor (add)
Control System PWM
Programmable (add)
Signal Voltage (add)
Electrical & Environment
Operating Voltage 6–8.4 V
Power Source (add)
Regulator Type (add)
Temperature (add)
Water Rating (add)
Certification (add)
Idle Current (add)
Connectivity
Connector JR (Universal) estimate
Wire Length (add)
Origin
Country of Origin (add)

Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.

Performance Analysis

Shaft Power 9.75–16.87 W
Torque Density6.5930 oz-in/g
Stronger than 91% of the 831 Digital Standard servos in the database
Torque-to-Volume Ratio270.10 oz-in/in³
Denser torque than 92% of the 842 Digital Standard servos in the database
Power Density8.637 W/in³
More power-dense than 95% of the 1643 Digital Standard servos in the database
Speed-to-Weight0.12500 (1/sec·g)
Faster than 55% of the 820 Digital Standard servos in the database
Speed-Torque Trade-off52.74
Better balanced than 80% of the 825 Digital Standard servos in the database
Torque Gain per Volt8.77%/V
More voltage-responsive (torque) than 14% of the 672 Digital Standard servos in the database
Speed Gain per Volt17.85%/V
More voltage-responsive (speed) than 64% of the 686 Digital Standard servos in the database
Voltage Range Width2.4 V
Wider voltage range than 56% of the 1268 Digital Standard servos in the database

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