KO Propo RSx3-12-HC

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Product Number	30129
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V104.18 oz-inAbove Average
Speed	6.0V0.13 sec/60°Average
Physical
Weight	0.97 ozBelow Average
Dimensions	L 1.299 in W 0.591 in H 1.024 in
Case Material	Aluminum
Drivetrain
Motor Type	Coreless
Gears	Metal
Gear Spline/Teeth	23 T estimate
Rotation/Support	Dual Bearings
Control & Signal
Control System	HCS / PWM
Programmable	Yes
Electrical & Environment
Operating Voltage	6–6 V
Origin
Country of Origin	Japan

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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.

Compatible Hardware

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*Spec is estimated from brand data.

Class Comparison

Torque	Above Average Stronger than 83% of 356 Mini servos at 6.0V
Speed	Average Faster than 45% of 358 Mini servos at 6.0V
Weight	Below Average Lighter than 31% of 693 Mini servos

Performance Analysis

Shaft Power	1.48 W
Power Density	1.885 W/in³ More power-dense than 67% of 112 KO Propo servos
Torque Density	3.8022 oz-in/g Stronger than 62% of 38 KO Propo servos
Torque-to-Volume Ratio	132.52 oz-in/in³ Denser torque than 70% of 38 KO Propo servos
Speed-to-Weight	0.28074 (1/sec·g) 4th-highest speed-to-weight of 38 KO Propo servos
Speed-Torque Trade-off	13.54 Better balanced than 35% of 38 KO Propo servos
Voltage Range Width	0.0 V Wider voltage range than 14% of 38 KO Propo servos