Ball Screws

Ball screws are suitable for various applications with a comprehensive selection of thread geometries and nut types. They are available in ground, whirled and rolled design, as well as with customized machine ends.

In Standard Stock Progam we offer

  • Ball Screws
  • Ball Screw Shafts - Rolled, Right Hand; 
  • Ball Screw Nuts - Right Hand
  • Ball Screw Nuts in the following designs
    • FSI
    • FSR
    • FSC
    • FSH
    • RSB
    • SSV

Our solutions include:

Ball Screws

  • with combined right hand/left hand thread
  • with high leads
  • Miniature Ball screws
  • in stainless steel
  • with machined ends for mounting with support units
  • for use in high-temperature environments

Ball Screw Shafts

  • Ground, whirled and rolled
  • Diameter 10 mm to 125 mm
  • Thread length up to 12,000 mm
  • Screws with extended lengths available
  • Thread pitch 2 mm to 100 mm
  • Thread pitches right hand
  • Thread pitches left hand
  • Tolerance classes beginning IT 1 acc. to DIN 69051

Ball Screw Nuts

  • Flange ball screw nuts as well as Round and Square ball screw nuts
  • Single and double nuts
  • Various preload classes
  • Various ball recirculation systems

Machined Shaft Ends

Corresponding to the standard designs or according to your drawings and individual requirements.

Ball Screws Overview

This section contains a selection of our products with further links to the respective technical specifications. Didn’t find what you were looking for? Contact us and we will be pleased to advise you on your project.

Ball Screws Summary of Manufacturing Capabilities & Preferred Types
Manufacturing Capabilities & Preferred Types
Ball Screw Shafts Rolled, Right Hand, Standard
Ball Screw Shafts Rolled, Right Hand, Standard
Ball Screw Nuts Right Hand, Standard
Ball Screw Nuts Right Hand, Standard
Ball Screw Nuts FSI
Ball Screw Nuts FSI
Ball Screw Nuts FSR
Ball Screw Nuts FSR
Ball Screw Nuts FSC
Ball Screw Nuts FSC
Ball Screw Nuts FSH
Ball Screw Nuts FSH
Ball Screw Nuts RSB
Ball Screw Nuts RSB
Ball Screw Nuts SSV
Ball Screw Nuts SSV

Good to know: Ball Screws

Ball screws consist of a ball screw spindle and a ball screw nut in which the balls are integrated, and the balls' return mechanism. Ball screws are used as drive and feed element and are among the most commonly used type of screws in industrial and
precision machinery. The principal function of a ball screw is to convert rotary motion to linear motion or torque to thrust, and vice versa.

Our Ball screws are manufactured in accuracy classes IT1 to T7 according to ISO and DIN standards and meet even the most demanding requirements by using high quality materials, employment of modern production equipment and the ensurance of consistent high quality standards.

Ball screws are characterized by high rigidity and durability. Furthermore, the design of the screws secures high efficiency with high accuracy. Also characteristic is the low friction and precise operation of the ball screw drives that require only a low driving torque and provide smooth operation.

1. Nominal thread diameter

The nominal thread diameter determines the buckling stiffness of the ball screw shaft, depending on its length and support. The nominal diameter of the shaft d0 is used to derive the relation of its maximum rotational speed nmax towards the recirculation speed of the balls in the used recirculation system and type of lubrication. The product of multiplying the nominal diameter and the rotational speed gives us a characteristic value, limiting the application and the function of the ball screw.


2. Thread lead

The thread pitch (P) determines the dynamic properties of the recirculation system, whilst the precision class determines the resulting working accuracy of positioning. In our product range we offer pitches from 2 mm to 100 mm depending on the nominal diameters and recirculation types. The pitch size determines the maximum size of the balls and therefore influences the total number of balls in the recirculation system or in the working thread of the nut. To ensure the functioning of the recirculation system, the number of balls per working thread shold not excced 100. This qualification in turn determines the minimum required pitch of a particular nominal screw diameter.


3. Precision classes

Ball screws are offered in several precision classes - please see the following table for detailed information. Pitch deviations are in compliance with the ISO 3408 and DIN 69051 standards.

Mean travel deviations for whirled and rolled ballscrews with the precision classes of T5 and T7 are in compliance with the ISO 3408-3 standard for transport ballscrews.


4. Load capacity, Nominal life, Rigidity

Load capacity is another technical parameter which is important for the proper selection of a ball screw which, similarly to the ball bearings, is characterized by the static load capacity C0 (defined as the load resulting permanent deformation of the functional thread or ball surface with diameter Dw equalling 0.0001 Dw) and the dynamic load capacity Ca (corresponding to the load that the ball screw can theoretically endure reaching a basic rating life of one million revolutions L10 = 1×106).

Another important characteristic property of the ball screws is their rigidity R, which is defined as a ratio of the external axial load Fa to the axial travel of the nut b onto the ball screw shaft.

For more information on how to determine your suitable ball screw, including calculation formulas, please visit our download area.