Graupner DES 131

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-25

Identity
Brand
Product Number	7902
Category	Hobby
Performance
Torque	6.0V 11.11 oz-in 4.8V 9.72 oz-in Bottom 10%
Speed	6.0V 0.06 sec/60° 4.8V 0.07 sec/60° Top 10%
Physical
Weight	0.18 ozTop 10%
Dimensions	L 0.787 in W 0.433 in H 0.807 in
Drivetrain
Motor Type	Brushed
Gears	Karbonite
Rotation Mode	Positional
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Rotational Range	90°
Pulse Cycle	3 ms
Neutral Position	1500 µs
Refresh Rate	333 Hz
Control System	PWM
Programmable	Yes
Electrical & Environment
Operating Voltage	4.8–6 V
Idle Current	0.005 A
Connectivity
Connector	JST-ZHR

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Bottom 10% Stronger than 4% of 349 Digital Micro servos at 4.8V
Speed	Top 10% Faster than 92% of 347 Digital Micro servos at 4.8V
Weight	Top 10% Lighter than 97% of 597 Digital Micro servos

Performance Analysis

Shaft Power	0.26–0.34 W
Power Density	1.244 W/in³ More power-dense than 28% of 563 Digital Micro servos
Torque Density	1.9440 oz-in/g Stronger than 27% of 349 Digital Micro servos
Torque-to-Volume Ratio	35.31 oz-in/in³ Denser torque than 8% of 345 Digital Micro servos
Speed-to-Weight	2.85714 (1/sec·g) 5th-highest speed-to-weight of 347 Digital Micro servos
Speed-Torque Trade-off	0.68 Better balanced than 1% of 345 Digital Micro servos
Torque Gain per Volt	11.92%/V More voltage-responsive (torque) than 21% of 290 Digital Micro servos
Speed Gain per Volt	13.89%/V More voltage-responsive (speed) than 24% of 295 Digital Micro servos
Voltage Range Width	1.2 V Wider voltage range than 27% of 496 Digital Micro servos