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7/4/2016 | New Thomson Web Video Simplifies Ball Screw Assembly Identification

07-04-2016 - RADFORD, VA – Thomson Industries, Inc., a leading manufacturer of mechanical motion control solutions, has released an educational video that demonstrates simple techniques to help design engineers identify ball screws assemblies.

“Customers needing to replace worn ball screw assemblies sometimes aren’t sure exactly what kind of assembly they are using,” said Randy Hamper, Senior Design Engineer at Thomson. “We created this video to demonstrate some simple techniques to help determine whether they have a metric- or inch-based assembly and to understand how ball screw and lead dimensions are used to characterize ball screws. Following these simple steps will shorten the time it takes to replace worn assemblies and run their processes with new precision.”

Ball screw assemblies differ according to whether they are metric or inch scale, by the ball circle diameter and by the number of leads on the screw. In this two-minute video, Hamper shows how to tell instantly whether the assembly is metric- or inch-based by looking at the ball return path. He demonstrates how to measure ball screw circle diameter with callipers, how to wrap a string around the threads to aid in determining whether it is a 1-, 2-, or 4-start screw and how all of these measurements play out in ball screw assembly naming conventions.

Thomson strives to continually innovate and lead the marketplace in linear motion solutions and share their application engineering and technical expertise. To that end, Thomson has authored a wide range of educational videos, webinars and technical white papers available now at to inform and guide design engineers, explain technology alternatives and simplify the linear motion component selection process.

To view the full video, please visit:

For more information about the Thomson ball screw assemblies, please visit:

About Thomson Industries, Inc. With more than 70 years of motion control innovation and quality, Thomson is the industry’s premier producer of Linear Ball Bushing® Bearings and Profile Rail Bearings, 60 Case® Shafting, Ground and Rolled Ball Screws, Linear Actuators, Gearheads, Clutches, Brakes, Linear Systems and related accessories. Thomson invented the Linear Ball Bushing Bearing in 1945 and has set the standard ever since with an unsurpassed set of mechanical motion control solutions serving global commercial and aerospace and defense markets. Thomson has facilities in North America, Europe and Asia with more than 2000 distributor locations around the world.

Thomson Industries, Inc., 1500 Mittel Boulevard, Wood Dale, IL 60191-1073; 1-540-633-3549; 1-540-633-0294 (Fax):;

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