Skip to content Skip to navigation
Ball Screw Assemblies

Ball Screw Assemblies

Thomson ball screw assemblies consist of a ball screw, a ball nut with recirculating ball bearings and end supports for mounting. The interface between the screw and the nut is made by ball bearings that roll in matching forms in the ball screw and ball nut. The load on the ball screw is distributed over a large number of ball bearings so that each ball is subjected to a relatively low load. Because of the rolling element design, ball screw assemblies have a very low coefficient of friction, which equates to highly efficient mechanics.


Discover Your Ideal Ball Screw Solution in Minutes


Why Choose Ball Screw Assemblies?

Ball screw assemblies provide an excellent method for translating rotational motion to linear motion for many applications, including those where high loads and close tolerances are required. To apply the correct type of ball screw and nut assembly in a particular application, the design engineer must consider the advantages and capabilities of each. Selecting the right technology can reduce design complexity, improve performance and reduce the overall cost of the assembly.

This image compares the three types of ball return systems (from left to right): internal, button and external.

Mounting Options

Ball screws are mounted in either supported or fixed configurations. A supported end holds the ball screw at one focal point and does not resist bending moments. A supported end is generally easier to align and install than a fixed one, so installation costs are typically lower. A fixed end resists bending moment loads because it is typically based on two bearings spaced sufficiently so the ball screw remains perpendicular to the planes of the rotary bearings. The fixed offers greater column strength and higher critical speed. The image below illustrates four fixity options.

The assembly can be fixed at both ends, fixed at only one end and supported on the other, supported at both ends, or fixed at one end and free at the other.

Ball screw assemblies are not all alike. Whether it be metric ball screws, inch ball screws or miniature ball screws, key differences affect their performance and extend their lives. These include:

  • Design. Through extensive research and evaluations, Thomson engineers have been able to develop a comprehensive ball screw offering that delivers optimal solutions for countless applications. Available in a full range of diameters, leads and ball nut configurations, in either pre-loaded or non-pre-loaded types, and all in industry standard envelopes, our ball screws provide dependable accuracy and repeatability at an economical price.
  • Quality. With a vast background in countless applications, Thomson is uniquely positioned to provide the highest levels of quality across our full line of ball screw assemblies. Our fully equipped engineering laboratory performs qualification testing for mechanical performance, environmental effects and structural integrity. Your rotating ball screw nut assembly is inspected every step of the way to ensure top quality and performance.
  • Materials. The materials used to manufacture ball screw assemblies are critical to their performance. Our in-house metallurgists control and verify that the materials used are of the highest quality. They can also select and recommend materials best suited to your particular application.
  • Manufacturing. Thomson maintains the most modern and complete ball screw manufacturing facilities in the industry. In-house manufacturing capabilities include our proprietary heat treating and plating processes. Expert manufacturing using the most modern equipment available provides ball screw assemblies that set the standards for performance, precision and travel life.
  • Application Support. Working with Thomson is like having your own staff of ball screw design engineers able to address application concerns and recommend solutions. Thomson field sales and applications engineering personnel have more ball screw expertise than any other group in the industry. They are skilled at evaluating your requirements and designing assemblies that fit your needs.

기술 문서

  • 인치 볼 스크류와 미터 볼 스크류: 올바른 질문을 하고 계십니까?

    인치 볼 스크류와 미터 볼 스크류를 모두 사용할 수 있기 때문에 사양을 작성하는 과정에서 측정 단위를 기반으로 제품군을 선택하는 설계자가 있습니다. 이런 결정을 내리면 응용 분야에 이상적인 제품이 제외될 수 있으며 시간과 노동력, 비용이 크게 늘어날 수 있습니다. 이 글은 제품 이름이 아니라 성능을 위주로 제품 크기와 종류를 선택하면 더 효율적인 선형 운동 설계를 달성할 수 있음을 설명합니다.

    추가 정보
  • 고부하 볼 스크류 - 고부하 밀도로 운동을 제어하는 솔루션

    이제까지 제한된 크기로 큰 부하를 감당해야 할 때는 롤러 스크류가 유일한 선택지라고 생각했습니다. 하지만 실제적으로 볼 스크류 기술이 발전함에 따라 볼 스크류로도 큰 부하를 감당할 수 있게 되었습니다. 고부하 볼 스크류는 비슷한 성능의 롤러 스크류보다 값이 50% 이상 저렴하므로 이는 중요한 문제입니다. 

    추가 정보
  • 볼 스크류 – 코봇이 안전하고 효율적으로 작동하기 위한 해결책

    물건을 끊임없이 들어 올리면서도 사람의 손길이 필요한 대규모 생산 응용 분야에서 사용하는 코봇(인간과의 협업을 위해 만들어진 로봇)이 인기를 얻고 있습니다. 한 프랑스 코봇 제작 업체에서 기어 대신 볼 스크류와 케이블 엑추에이터를 사용하는 코봇을 제작해 코봇의 효율성과 안전성을 한 단계 끌어올렸습니다.

    추가 정보
제품 찾기
back to top