Exceptionally high speed and dynamics

With its speed and torque, the new AM3248 stepper motor from FAULHABER raises the bar in terms of performance and dimensions. Offering up to 10,000 rpm, it can achieve five times the speed of comparable stepper motors.

With its speed and torque, the new AM3248 stepper motor from FAULHABER raises the bar in terms of performance and dimensions. Offering up to 10,000 rpm, it can achieve five times the speed of comparable stepper motors. Combined with a gearhead reduction of 100:1, it supplies a torque of 5 Nm. The motor delivers these values with a diameter of just 32 mm. This makes it ideally suited for a wide range of applications in areas such as aerospace, laboratory automation, large optical systems, the semiconductor industry, robotics and 3D printing.


The multi-pole, two-phase AM3248 stepper motor performs 48 steps per revolution and offers a very high holding torque of 85mNm. The motor starts with a high speed from the very first step; thanks to its low inertia, it can be used in applications that require very fast acceleration and fast changes of direction. Newly developed large ball bearings further extend the already long service life of this motor type. For its size class, the performance values that it achieves in combination with a 32 GPT gearhead are unrivaled on the market. The motor can also be combined with an IE3 magnetic encoder.

These properties and options make the motor ideally suited for a variety of demanding applications. This includes aligning the solar panels of satellites, for example. The motors move the booms so that the panels are always directly facing the sun. In addition to working precisely and reliably over many years, the motors must also be able to withstand the extreme temperatures in outer space. In the semiconductor industry, very high dynamics and speed are required when positioning the wafers in very confined installation conditions in the machines. This is another application in which the highest level of precision and reliability are essential.

"Our new AM3248 model meets all requirements and is ideally suited for high-performance applications of this kind," explains Thomas Würgler of FAULHABER PRECISTEP. The corporate unit specializing in stepper motors is located in the Swiss city of La Chaux-de-Fonds, known for its watchmaking. "We are able to adapt the product to the requirements of the respective application, even in small production runs. We provide our customers with the entire drive package, including technical advice and support from a single source."

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T.J. Davies' Retention Knobs

T.J. Davies' Retention Knobs

Our retention knobs are manufactured above international standards or to machine builder specifications. Retention knobs are manufactured utilizing AMS-6274/AISI-8620 alloy steel drawn in the United States. Threads are single-pointed on our lathes while manufacturing all other retention knob features to ensure high concentricity. Our process ensures that our threads are balanced (lead in/lead out at 180 degrees.) Each retention knob is carburized (hardened) to 58-62HRC, and case depth is .020-.030. Core hardness 40HRC. Each retention knob is coated utilizing a hot black oxide coating to military specifications. Our retention knobs are 100% covered in black oxide to prevent rust. All retention knob surfaces (not just mating surfaces) have a precision finish of 32 RMA micro or better: ISO grade 6N. Each retention knob is magnetic particle tested and tested at 2.5 times the pulling force of the drawbar. Certifications are maintained for each step in the manufacturing process for traceability.