Blue Bird BMS-705MG

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-27

Identity
Brand
Product Number	705MG
Category	Hobby
Performance
Torque	6.0V 103.00 oz-in 4.8V 83.00 oz-in Below Average
Speed	6.0V 0.16 sec/60° 4.8V 0.18 sec/60° Bottom 10%
Physical
Weight	1.09 ozAbove Average
Dimensions	L 1.685 in W 0.847 in H 0.925 in
Drivetrain
Gears	Steel
Gear Spline/Teeth	25 T estimate
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Analog
Pulse Cycle	8 ms
Neutral Position	1520 µs
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–6 V
Water Rating	Water Resistant
Connectivity
Connector	JR (Universal)
Origin
Country of Origin	China

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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	Below Average Stronger than 14% of 229 Low Profile servos at 4.8V
Speed	Bottom 10% Faster than 9% of 227 Low Profile servos at 4.8V
Weight	Above Average Lighter than 79% of 53 Analog Low Profile servos

Performance Analysis

Shaft Power	0.85–1.19 W
Power Density	0.902 W/in³ More power-dense than 71% of 53 Analog Low Profile servos
Torque Density	2.6774 oz-in/g Stronger than 51% of 36 Blue Bird servos
Torque-to-Volume Ratio	62.87 oz-in/in³ Denser torque than 40% of 36 Blue Bird servos
Speed-to-Weight	0.17921 (1/sec·g) Faster than 46% of 36 Blue Bird servos
Speed-Torque Trade-off	14.94 Better balanced than 64% of 37 Blue Bird servos
Torque Gain per Volt	20.08%/V More voltage-responsive (torque) than 50% of 29 Blue Bird servos
Speed Gain per Volt	10.43%/V More voltage-responsive (speed) than 4% of 29 Blue Bird servos
Voltage Range Width	1.2 V Wider voltage range than 80% of 26 Analog Low Profile servos