Graupner DS 8421

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Compatible Hardware

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-07-28

Identity
Brand
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 126.00 oz-in 4.8V 113.30 oz-in
Speed	6.0V 0.10 sec/60° 4.8V 0.12 sec/60°
Physical
Weight	1.52 ozAbove Average
Dimensions	L 1.59 in W 0.75 in H 1.04 in
Drivetrain
Gears	Metal
Gear Spline/Teeth	23 T estimate
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Connectivity
Connector	JR (Universal) estimate

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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

Weight

Above Average

Lighter than 86% of 251 Digital Low Profile servos

Performance Analysis

Shaft Power	1.75–2.35 W
Power Density	1.898 W/in³ More power-dense than 26% of 215 Digital Low Profile servos
Torque Density	2.6349 oz-in/g
Torque-to-Volume Ratio	91.36 oz-in/in³
Speed-to-Weight	0.19380 (1/sec·g)
Speed-Torque Trade-off	13.60