Straighter motion
Rolling element bearings are directly influenced by surface finish and irregularities on the guide. Being non-contact air bearings average these errors.

Silent and smooth operation
Recirculating rollers or balls create noise and vibration as hard elements become loaded and unloaded and change direction in return tubes. This is especially noticeable in the resolution of scanners.

Higher damping
Being fluid film bearings, air bearings have a squeeze film damping effect resulting in higher dynamic stiffness and better controllability.

Eliminates oil
Air bearings do not use oil lubrication, eliminating the problems associated with oil. In dusty environments (dry machining) ways are dry and bearings are self-cleaning because positive air pressure pushes dust away. In contrast, oil lubrication becomes a lapping slurry.

High speeds
High speeds - high acceleration. No balls or rollers to slip at high acceleration.