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KST BLS905X
Standard

KST BLS905X

Compatible Hardware

*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-10
Identity
Brand KST
Category Hobby
Performance
Torque
8.4V 111.04 oz-in
7.4V 97.16 oz-in
6.0V 83.28 oz-in Below Average
Speed
8.4V 0.04 sec/60°
7.4V 0.04 sec/60°
6.0V 0.05 sec/60° Top 10%
Physical
Weight 2.54 ozBelow Average
Dimensions L 1.595 in
W 0.787 in
H 1.457 in
Case Material Aluminum
Drivetrain
Motor Type Brushless
Gears Steel
Gear Spline/Teeth 25 T estimate
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Refresh Rate 560 Hz
Control System PWM
Electrical & Environment
Operating Voltage 6–8.4 V
Connectivity
Connector JR (Universal) estimate

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 13% of 1043 Digital Standard servos at 6.0V
SpeedTop 10%
Faster than 99% of 1041 Digital Standard servos at 6.0V
WeightBelow Average
Lighter than 28% of 1902 Digital Standard servos

Performance Analysis

Shaft Power 3.42–5.87 W
Power Density3.207 W/in³
More power-dense than 61% of 1759 Digital Standard servos
Torque Density1.1567 oz-in/g
Stronger than 6% of 1036 Digital Standard servos
Torque-to-Volume Ratio45.54 oz-in/in³
Denser torque than 11% of 1042 Digital Standard servos
Speed-to-Weight0.30864 (1/sec·g)
Faster than 95% of 1033 Digital Standard servos
Speed-Torque Trade-off3.75
Better balanced than 5% of 1031 Digital Standard servos
Torque Gain per Volt13.89%/V
More voltage-responsive (torque) than 39% of 850 Digital Standard servos
Speed Gain per Volt11.91%/V
More voltage-responsive (speed) than 29% of 871 Digital Standard servos
Voltage Range Width2.4 V
Wider voltage range than 58% of 1539 Digital Standard servos

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