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KST MS665
Standard

KST MS665

Compatible Hardware

*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-10
Identity
Brand KST
Category Hobby
Performance
Torque
8.4V 104.10 oz-in
7.4V 94.38 oz-in
6.0V 80.50 oz-in Below Average
Speed
8.4V 0.04 sec/60°
7.4V 0.05 sec/60°
6.0V 0.05 sec/60° Top 10%
Physical
Weight 2.43 ozAverage
Dimensions L 1.59 in
W 0.787 in
H 1.50 in
Case Material Aluminum
Drivetrain
Motor Type Coreless
Gears Steel
Gear Spline/Teeth 25 T estimate
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Neutral Position 760 µs
Refresh Rate 560 Hz
Angle Sensor Hall Effect
Control System PWM
Electrical & Environment
Operating Voltage 6–8.4 V
Connectivity
Connector JR (Universal) estimate
Wire Length 160 mm

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.

Class Comparison

TorqueBelow Average
Stronger than 12% of 1043 Digital Standard servos at 6.0V
SpeedTop 10%
Faster than 98% of 1041 Digital Standard servos at 6.0V
WeightAverage
Lighter than 36% of 1902 Digital Standard servos

Performance Analysis

Shaft Power 2.98–4.81 W
Power Density2.562 W/in³
More power-dense than 53% of 1759 Digital Standard servos
Torque Density1.1667 oz-in/g
Stronger than 6% of 1036 Digital Standard servos
Torque-to-Volume Ratio42.87 oz-in/in³
Denser torque than 10% of 1042 Digital Standard servos
Speed-to-Weight0.28986 (1/sec·g)
Faster than 94% of 1033 Digital Standard servos
Speed-Torque Trade-off4.03
Better balanced than 5% of 1031 Digital Standard servos
Torque Gain per Volt12.22%/V
More voltage-responsive (torque) than 30% of 850 Digital Standard servos
Speed Gain per Volt10.42%/V
More voltage-responsive (speed) than 20% of 871 Digital Standard servos
Voltage Range Width2.4 V
Wider voltage range than 58% of 1539 Digital Standard servos

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