The FAULHABER Series 3274 BP4 Brushless DC Motor from MICROMO

A Flyweight with Heavyweight Performance

In the fight for high performance with minimum weight, FAULHABERs 3274 BP4 is the new champion in the ring. The brushless DC servo motor, measuring 32 mm in diameter and 74 mm in length, has massive continuous torque of 165 mNm. Surprisingly, it weighs in at just under 320 g, which is half the weight of conventional motors with comparable power.


The four‐pole brushless DC servo motor is ideal for applications in which high power and dynamic start/stop operation with the lowest possible total weight is an important factor. Perfect application fits include humanoid robots, electric grippers used in process automation and high‐performance traction drives used in inspection robotics.

The 3274 BP4 is overload‐resistant and operates without wear‐prone mechanical commutation. As a result, its operational lifetime is many times longer than that of a conventional DC micro motor. The slope of the motor characteristic curve is just 3 rpm/mNm, with a stall torque of 2.7 Nm. The 3274 BP4 can reliably deliver what the application demands even under the harshest ambient conditions, such as at low temperatures or high mechanical loads (e.g. in aerospace applications). This is made possible by a robust stainless steel housing and the omission of adhesives, which are otherwise usually used for assembly.

One standout feature of this motor series is the high flexibility in its design. The FAULHABER series 3274 BP4 is equipped as standard with digital hall sensors. High‐resolution optical and magnetic encoders can be attached with ease to the rear multifunction flange. As an option, the motor is also available with analog (linear) hall sensors that can replace an encoder in many applications. Finally, a large selection of optimal performance precision gearheads rounds off the complete drive system.

Contact the MICROMO Team today and learn more.

Featured Product

Model TR1 Tru-Trac

Model TR1 Tru-Trac

The Model TR1 Tru-Trac™ linear measurement solution is a versatile option for tracking velocity, position, or distance over a wide variety of surfaces. An integrated encoder, measuring wheel, and spring-loaded torsion arm in one, compact unit, the Model TR1 is easy to install. The spring-loaded torsion arm offers adjustable torsion load, allowing the Model TR1 to be mounted in almost any orientation - even upside-down. The threaded shaft on the pivot axis is field reversible, providing mounting access from either side. With operating speeds up to 3000 feet per minute, a wide variety of configuration options - including multiple wheel material options - and a housing made from a durable, conductive composite material that minimizes static buildup, the Model TR1 Tru-Trac™ is the ideal solution for countless applications.