Blue Bird BLS-125AWB

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*Based on known specs.

Technical Specifications

Last Updated: 2026-11-04

Identity
Brand
Product Number	BLS-125AWB
Category	Hobby
Performance
Torque	8.4V 1,757.10 oz-in 7.4V 1,547.30 oz-in 6.6V 1,382.10 oz-in
Speed	8.4V 0.15 sec/60° 7.4V 0.17 sec/60° 6.6V 0.19 sec/60°
Stall Current	11.7–15.4 ABottom 10%
Physical
Weight	8.08 ozAverage
Dimensions	L 2.591 in W 1.181 in H 2.224 in
Case Material	Aluminum
Drivetrain
Motor Type	Brushless
Gears	Stainless Steel
Gear Spline/Teeth	15 T
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Neutral Position	1500 µs
Dead Band	2 µs
Refresh Rate	400 Hz
Control System	PWM
Electrical & Environment
Operating Voltage	6–8.7 V
Power Source	2S Li-Po / 2S Li-Fe
Temperature	-20–60 °C
Water Rating	IP67
Connectivity
Connector	JR \| JST
Wire Length	300 mm
Origin
Country of Origin	Taiwan

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Weight	Average Lighter than 41% of 168 Digital Giant servos
Stall Current	Bottom 10% Lower draw than 4% of 108 Digital Giant servos

Performance Analysis

Shaft Power	13.45–21.66 W
Power Density	3.183 W/in³ More power-dense than 84% of 136 Digital Giant servos
Torque Density	6.0354 oz-in/g
Torque-to-Volume Ratio	203.09 oz-in/in³
Speed-to-Weight	0.02298 (1/sec·g)
Speed-Torque Trade-off	262.59
Current-per-Torque Ratio	0.0111 A/oz-in
Voltage Range Width	2.7 V Wider voltage range than 42% of 160 Digital Giant servos