Eight Reasons to Use Air Bearings Over Mechanical Bearings - December 2016
PI (Physik Instrumente) L.P.
The article "Eight Reasons to Use Air Bearings Over Mechanical Bearings" appeared in the December 2016 issue of Power Transmission Engineering.
Mechanical guiding systems, such as crossedroller bearings, work well for most motion control applications; however, when precision, angular repeatability, and geometric performance (runout, straightness…) are critical or where submicron bearing rumble is problematic, air bearings are recommended. An air-bearing stage is a rotary or linear positioner that floats on a cushion of air, using one of several preload mechanisms, nearly eliminating mechanical contact and thus wear, friction, and hysteresis effects. Here are eight reasons why an air-bearing stage might be the right choice for your application:
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