Graupner DES 427 BB - Micro Servo

Specifications

Source: Most data comes from the manufacturer but some data is sourced from our loyal community.

Last Updated:	2025-08-07
Modulation:	Digital
Torque:	6.0V: 27.78 oz-in (2.00 kg-cm) 6.0V: 27.78 oz-in (2.00 kg-cm)
Speed:	6.0V: 0.15 sec/60° 6.0V: 0.15 sec/60°
Weight:	0.26 oz (7.5 g)
Dimensions:	Length:0.91 in (23.1 mm) Width:0.35 in (8.9 mm) Height:1.14 in (29.0 mm)
Motor Type:	3-pole
Gear Type:	Plastic
Rotation/Support:	Dual Bearings
Rotational Range:	(add)
Pulse Cycle:	(add)
Pulse Width:	(add)
Connector Type:	JR

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The Graupner DES 427 BB is a high-performance digital micro servo that brings the precision of the "Digital Eco Speed" (DES) line to a compact and lightweight package. This servo is engineered for the discerning pilot of small, high-performance aircraft. It features a precise digital controller and a smooth, dual ball bearing (BB) supported output shaft. This combination makes the DES 427 BB an outstanding choice for the flight controls on a high-performance park flyer, a small electric glider, or as a very precise cyclic servo for a 250-class helicopter.
The character of the DES 427 BB is its high-fidelity digital precision in a small size. The digital controller provides a crisp, responsive, and locked-in feel that is a significant upgrade from analog servos. The dual ball bearings ensure that this digital precision is translated into pure, slop-free mechanical motion, resulting in a very accurate and confident control feel. It is a premium servo for the pilot who wants the best possible performance from their small model.
For roboticists working on high-precision micro-projects, the Graupner DES 427 BB is a superb actuator. It is ideal for building a highly stable and jitter-free camera gimbal for a small drone, a precise sensor-pointing mechanism, or for the joints of a small robotic manipulator where accurate, repeatable positioning is essential. It offers a professional level of precision for compact robotic systems.