Blue Bird BMS-371

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-23

Identity
Brand
Product Number	BMS-371
Category	Hobby
Discontinued	Yes
Performance
Torque	4.8V21.00 oz-in
Speed	4.8V0.12 sec/60°
Physical
Weight	0.33 ozAverage
Dimensions	L 0.95 in W 0.43 in H 0.95 in
Drivetrain
Gears	Plastic
Gear Spline/Teeth	25 T estimate
Control & Signal
Modulation	Analog
Pulse Cycle	8 ms
Neutral Position	1520 µs
Refresh Rate	125 Hz
Electrical & Environment
Operating Voltage	4.5–5.5 V
Power Source	Ni-MH / Ni-CD
Connectivity
Connector	JR (Universal) estimate

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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

Weight

Average

Lighter than 37% of 336 Analog Micro servos

Performance Analysis

Shaft Power	0.32 W
Power Density	0.834 W/in³ More power-dense than 47% of 322 Analog Micro servos
Torque Density	2.2340 oz-in/g
Torque-to-Volume Ratio	54.11 oz-in/in³
Speed-to-Weight	0.88653 (1/sec·g)
Speed-Torque Trade-off	2.52
Voltage Range Width	1.0 V Wider voltage range than 9% of 174 Analog Micro servos