Graupner DES 478 BBMG

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-23

Identity
Brand
Product Number	S7917
Category	Hobby
Performance
Torque	6.0V 36.82 oz-in 4.8V 29.74 oz-in Average
Speed	6.0V 0.15 sec/60° 4.8V 0.20 sec/60° Bottom 10%
Physical
Weight	0.39 ozAverage
Dimensions	L 0.93 in W 0.45 in H 1.06 in
Drivetrain
Motor Type	3-pole
Gears	Metal
Gear Spline/Teeth	23 T estimate
Rotation Mode	Positional
Rotation/Support	Single Bearing
Control & Signal
Modulation	Digital
Rotational Range	90°
Pulse Cycle	3 ms
Neutral Position	1500 µs
Refresh Rate	333 Hz
Electrical & Environment
Operating Voltage	4.8–6 V
Idle Current	0.007 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 349 Digital Micro servos at 4.8V
Speed	Bottom 10% Faster than 5% of 347 Digital Micro servos at 4.8V
Weight	Average Lighter than 51% of 597 Digital Micro servos

Performance Analysis

Shaft Power	0.28–0.45 W
Power Density	1.023 W/in³ More power-dense than 18% of 563 Digital Micro servos
Torque Density	2.7036 oz-in/g Stronger than 58% of 349 Digital Micro servos
Torque-to-Volume Ratio	67.04 oz-in/in³ Denser torque than 40% of 345 Digital Micro servos
Speed-to-Weight	0.46620 (1/sec·g) Faster than 18% of 347 Digital Micro servos
Speed-Torque Trade-off	5.80 Better balanced than 76% of 345 Digital Micro servos
Torque Gain per Volt	19.84%/V More voltage-responsive (torque) than 67% of 290 Digital Micro servos
Speed Gain per Volt	25.00%/V More voltage-responsive (speed) than 84% of 295 Digital Micro servos
Voltage Range Width	1.2 V Wider voltage range than 44% of 496 Digital Micro servos