MOTION SYSTEM APPLICATIONS
This FMB rotary table bearing is specifically developed for high-precision rotary-motion tables. It’s less costly than other rotary bearings because it contains fewer components — and necessitates consideration of fewer less tolerances for | courtesy of PM B.V. installation.
Rotary bearings in everything — from miniature tables to railcars BEARING
variations abound to satisfy an array of loads, environments, speeds, expected design life, and more. Consider the bearings and slewing rings in wind turbines. These can reach 2 m in diameter and must sometimes bear hundreds of tons. In contrast are miniature bearings for medical applications. These often go into tiny handheld devices and other compact equipment necessitating bearings of just a couple millimeters in diameter (with rollers that are even smaller).
Shown here is the FMB rotary table bearing once installed. | courtesy of PM B.V.
Some bearings going into equipment subject to washdown have treated steel subcomponents; others for disposable or quiet designs are made of plastic. Industrial machines that endure hot, fast, or lubrication-starved conditions pose their own bearing-design challenges. Some of these benefit from the use of hybrid bearings — those with steel raceways and rollers or balls made from ceramic. No matter the design, each bearing type satisfies specific parameters. Ball bearings use balls to provide low-friction motion between bearing races. When selected properly, they require little maintenance. This feature and their limited heat generation make them indispensable. They are found in everything from skateboard wheels to turbine engines — in aerospace applications, medical equipment, and home appliances.
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DESIGN WORLD — MOTION
11 • 2020
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