Graupner DES 428 BBMG

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-09

Identity
Brand
Product Number	7911
Category	Hobby
Performance
Torque	6.0V 33.98 oz-in 4.8V 28.32 oz-in Average
Speed	6.0V 0.15 sec/60° 4.8V 0.20 sec/60° Bottom 10%
Physical
Weight	0.34 ozAverage
Dimensions	L 0.91 in W 0.35 in H 1.14 in
Drivetrain
Motor Type	3-pole
Gears	Metal
Gear Spline/Teeth	15 T estimate
Rotation Mode	Positional
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Rotational Range	90°
Pulse Cycle	3 ms
Neutral Position	1500 µs
Programmable	Yes
Electrical & Environment
Operating Voltage	4.8–6 V
Idle Current	0.005 A
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 55% of 328 Digital Micro servos at 4.8V
Speed	Bottom 10% Faster than 5% of 328 Digital Micro servos at 4.8V
Weight	Average Lighter than 57% of 620 Digital Micro servos

Performance Analysis

Shaft Power	0.27–0.42 W
Power Density	1.154 W/in³ More power-dense than 23% of 590 Digital Micro servos
Torque Density	2.9811 oz-in/g Stronger than 69% of 327 Digital Micro servos
Torque-to-Volume Ratio	78.00 oz-in/in³ Denser torque than 56% of 327 Digital Micro servos
Speed-to-Weight	0.53981 (1/sec·g) Faster than 21% of 327 Digital Micro servos
Speed-Torque Trade-off	5.52 Better balanced than 79% of 327 Digital Micro servos
Torque Gain per Volt	16.65%/V More voltage-responsive (torque) than 46% of 268 Digital Micro servos
Speed Gain per Volt	25.00%/V More voltage-responsive (speed) than 85% of 273 Digital Micro servos
Voltage Range Width	1.2 V Wider voltage range than 43% of 511 Digital Micro servos