Stober (www.stober.com), the geared motor and drives specialist from Germany, has introduced its latest range of compact servo ballscrew motors that directly drive spindle nuts or rotating spindles. Based on the PipeDrive Technology of the company, the high-torque motors are dynamic.
Offered in two versions, the first version, which is known as type EZS, has been specifically designed to drive screw drives using a rotating screw shaft. It will drive a screw nut that is usually attached to a linear slide. The screw is fitted by inserting it into the blind-hole hollow-shaft of the motor, and attaching it to a clamping set. In addition, screws measuring four diameters from 20 mm to 40 mm can also be used, depending on the size of the frame. The EZS motors have been equipped with special axial angular contact ball bearings, enabling it to effectively absorb high axial thrust.
The second version, which is known as type EZM, has been developed to drive screw drives using driven nuts. It features large flanged hollow shaft that can be used to directly drive flanged spindle nuts.
The new motors accomplish short lengths with the help of an orthocyclic tooth winding system that features a high copper fill factor, delivering around 80 percent more power compared to traditional winding. Both versions are offered in three lengths, two sizes and four spindle pitches (from 10 mm to 32 mm). The motors can also be supplied with liquid cooling and as brake motors. Forced cooling is offered as an option in the EZS models.