Futaba BLS351

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-09-14

Identity
Brand
Product Number	FUTM0551
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 217.00 oz-in 4.8V 173.00 oz-in Average
Speed	6.0V 0.13 sec/60° 4.8V 0.16 sec/60° Average
Physical
Weight	2.22 ozAverage
Dimensions	L 1.57 in W 0.79 in H 1.46 in
Case Material	Plastic / Metal
Drivetrain
Motor Type	Brushless
Gears	Metal
Gear Spline/Teeth	25 T estimate
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Rotational Range	150°
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal)

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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

Amazon eBay

*Spec is estimated from brand data.

Class Comparison

Torque	Average Stronger than 38% of 1043 Digital Standard servos at 4.8V
Speed	Average Faster than 35% of 1041 Digital Standard servos at 4.8V
Weight	Average Lighter than 49% of 1902 Digital Standard servos

Performance Analysis

Shaft Power	2.00–3.09 W
Power Density	1.704 W/in³ More power-dense than 37% of 1759 Digital Standard servos
Torque Density	2.7460 oz-in/g Stronger than 38% of 1036 Digital Standard servos
Torque-to-Volume Ratio	95.54 oz-in/in³ Denser torque than 39% of 1042 Digital Standard servos
Speed-to-Weight	0.09921 (1/sec·g) Faster than 34% of 1033 Digital Standard servos
Speed-Torque Trade-off	27.68 Better balanced than 48% of 1031 Digital Standard servos
Torque Gain per Volt	21.19%/V More voltage-responsive (torque) than 87% of 850 Digital Standard servos
Speed Gain per Volt	19.22%/V More voltage-responsive (speed) than 75% of 871 Digital Standard servos
Voltage Range Width	1.2 V Wider voltage range than 23% of 1539 Digital Standard servos