For the first time, the plastics engineering expert igus is offering its own stepper motors as part of a range of linear actuators with polymer bearings which it launched at the recent Hannover Fair.

Previously, igus has focused on manual operation and format adjustments of its linear guides. Now, it is introducing stepper motors in Nema sizes 17 and 23 with options such as encoders and brakes. At Hannover it was demonstrating the motors driving a range of quiet, lightweight actuators (called DryLin E SAW-0630) via trapezoidal or helix thread leadscrews with pitches from 1.5–15 mm.

The lubricant-free actuators are aimed at applications such as format adjustments, feed movements and handling small components. They can also be driven by stepper motors from other manufacturers using a quick-fit connection that links to the motor via an aluminium spacer and flange.

Almost all of the components used in the ready-to-fit actuators are made of plastic or aluminium, resulting in a low mass. The drive leadscrews are supported by ball bearings and the leadscrew nuts are made of high-performance polymers that need no lubricants.