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KST BLS825
Standard

KST BLS825

Compatible Hardware

*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-09
Identity
Brand KST
Category Hobby
Performance
Torque
8.4V 485.80 oz-in
7.4V 416.40 oz-in
6.0V 347.00 oz-in Above Average
Speed
8.4V 0.11 sec/60°
7.4V 0.13 sec/60°
6.0V 0.15 sec/60° Average
Physical
Weight 2.47 ozBelow Average
Dimensions L 1.595 in
W 0.787 in
H 1.496 in
Case Material Aluminum
Drivetrain
Motor Type Brushless
Gears Steel
Gear Spline/Teeth 25 T estimate
Rotation Mode Positional
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Rotational Range 90°
Pulse Cycle 3.003 ms
Pulse Width 900-2100 µs
Neutral Position 1500 µs
Refresh Rate 333 Hz
Angle Sensor Potentiometer
Control System PWM
Programmable Yes
Signal Voltage 3-5V
Electrical & Environment
Operating Voltage 6–8.4 V
Temperature -10–65 °C
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

TorqueAbove Average
Stronger than 75% of 1043 Digital Standard servos at 6.0V
SpeedAverage
Faster than 40% of 1041 Digital Standard servos at 6.0V
WeightBelow Average
Lighter than 34% of 1902 Digital Standard servos

Performance Analysis

Shaft Power 4.28–8.17 W
Power Density4.347 W/in³
More power-dense than 73% of 1759 Digital Standard servos
Torque Density4.9571 oz-in/g
Stronger than 77% of 1036 Digital Standard servos
Torque-to-Volume Ratio184.74 oz-in/in³
Denser torque than 76% of 1042 Digital Standard servos
Speed-to-Weight0.09524 (1/sec·g)
Faster than 30% of 1033 Digital Standard servos
Speed-Torque Trade-off52.05
Better balanced than 77% of 1031 Digital Standard servos
Torque Gain per Volt16.67%/V
More voltage-responsive (torque) than 59% of 850 Digital Standard servos
Speed Gain per Volt15.16%/V
More voltage-responsive (speed) than 47% of 871 Digital Standard servos
Voltage Range Width2.4 V
Wider voltage range than 58% of 1539 Digital Standard servos

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