Graupner DES 677 BB

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-25

Identity
Brand
Product Number	S7942
Category	Hobby
Performance
Torque	6.0V 36.82 oz-in 4.8V 28.32 oz-in Below Average
Speed	6.0V 0.07 sec/60° 4.8V 0.09 sec/60° Above Average
Physical
Weight	0.92 ozAverage
Dimensions	L 1.26 in W 0.63 in H 1.32 in
Drivetrain
Motor Type	Coreless
Gears	Karbonite
Gear Spline/Teeth	25 T estimate
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Refresh Rate	400 Hz
Programmable	Yes
Electrical & Environment
Operating Voltage	4.8–6 V
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	Below Average Stronger than 13% of 284 Digital Mini servos at 4.8V
Speed	Above Average Faster than 76% of 288 Digital Mini servos at 4.8V
Weight	Average Lighter than 49% of 490 Digital Mini servos

Performance Analysis

Shaft Power	0.58–0.97 W
Power Density	0.928 W/in³ More power-dense than 14% of 468 Digital Mini servos
Torque Density	1.0892 oz-in/g Stronger than 6% of 280 Digital Mini servos
Torque-to-Volume Ratio	27.03 oz-in/in³ Denser torque than 1% of 282 Digital Mini servos
Speed-to-Weight	0.42735 (1/sec·g) Faster than 66% of 284 Digital Mini servos
Speed-Torque Trade-off	2.55 Better balanced than 13% of 282 Digital Mini servos
Torque Gain per Volt	25.01%/V More voltage-responsive (torque) than 91% of 252 Digital Mini servos
Speed Gain per Volt	23.80%/V More voltage-responsive (speed) than 89% of 258 Digital Mini servos
Voltage Range Width	1.2 V Wider voltage range than 33% of 396 Digital Mini servos