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Mechanical Ball Screw

Micro series mechanical Ball Screw courtesy Haydon Kerk AMETEK

ball screw is a mechanical linear actuator that translates rotational motion to linear motion with little friction. A threaded shaft provides a helical raceway for ball bearings which act as a precision screw. As well as being able to apply or withstand high thrust loads, they can do so with minimum internal friction. They are made to close tolerances and are therefore suitable for use in situations in which high precision is necessary. The ball assembly acts as the nut while the threaded shaft is the screw. In contrast to conventional lead screws, ball screws tend to be rather bulky, due to the need to have a mechanism to re-circulate the balls.


Ball screws are used in:

  • Aerospace
  • Automotive
  • Industrial assembly equipment
  • Manufacturing equipment and tools
  • Robotics


Specific processes containing ball screw(s):

  • Aerospace "fly by wire" applications
  • Automotive power steering applications
  • Precision assembly equipment
  • CNC lathe equipment including return function
  • Industrial robot


Some of our Mechanical Ball Screw Sponsors include...

Everight Position Technologies Corp.

Everight Position Technologies provides solutions for linear, angular and tilt position measurement.

NUTEC Components

Producer of precision positioning systems with digital servo control, product line includes linear servo motor stages and tables up to 1.2-meter travel industrial, laboratory, clean room and vacuum compatible equipment, metrology grade XY and rotary stages.

PI (Physik Instrumente) L.P.

Physik Instrumente (PI) designs and manufactures precision motion control equipment, piezo motors, air bearing stages and hexapod parallel-kinematics.

Steinmeyer Inc.

Steinmeyer has been manufacturing precision ground ball screws since 1965 in sizes from an incredibly tiny 3 mm up to 125 mm in diameter.

Thomson Industries Inc

The Thomson brand is recognized and trusted as the global leader in mechanical motion technology.

© Content credits: Some of this page uses material from en.wikipedia.org .