Ball and Roller Screws

A standard ball and roller screw generally consists of a steel spindle with trapezoid thread and a bronze, metal or nylon nut. The nut moves along the spindle and converts a rotational movement into a linear movement or vice-versa.

In ball screw drives, the load is transferred from the spindle to the nut via balls. The balls are here diverted in a corresponding return system.

Roller screw drives are a further development of the ball screw drives. Here, the load is transferred from the screw spindle via the spherical screw edges of the rollers onto the nut. Roller screw drives stand out for their extreme precision and rigidity. They are particularly suitable for high travel speeds and accelerations.

Screw drives are used in drive systems, e.g. in mechanical engineering, automation technology or precision tool construction.


The advantages of screw drives:

  • low friction
  • high positioning accuracy
  • less wear and tear
  • long service life

EWELLIX Precision rolled ball screws (PDF)
EWELLIX Roller screws (PDF)

NSK Standard-Kugelgewindetriebe und Zubehör (German) (PDF)

ConCar delivers precision linear motion components at short notice. The components are assembled in our own processing centre and adapted to customer requirements (e.g. end processing of the spindles).

Product information
Brands Ewellix (formerly SKF Linear Systems), NSK
Designs free of play, with axial play, right or left screw thread, different gradients, with and without scraper, etc.
Variants for different preload and precision classes