Graupner DES 478 BBMG

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-09

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	0.37 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 57% of 328 Digital Micro servos at 4.8V
Speed	Bottom 10% Faster than 4% of 328 Digital Micro servos at 4.8V
Weight	Average Lighter than 48% of 620 Digital Micro servos

Performance Analysis

Shaft Power	0.28–0.45 W
Power Density	1.023 W/in³ More power-dense than 18% of 590 Digital Micro servos
Torque Density	2.8324 oz-in/g Stronger than 65% of 327 Digital Micro servos
Torque-to-Volume Ratio	67.04 oz-in/in³ Denser torque than 41% of 327 Digital Micro servos
Speed-to-Weight	0.48840 (1/sec·g) Faster than 16% of 327 Digital Micro servos
Speed-Torque Trade-off	5.80 Better balanced than 79% of 327 Digital Micro servos
Torque Gain per Volt	19.84%/V More voltage-responsive (torque) than 66% of 268 Digital Micro servos
Speed Gain per Volt	25.00%/V More voltage-responsive (speed) than 84% of 273 Digital Micro servos
Voltage Range Width	1.2 V Wider voltage range than 42% of 511 Digital Micro servos