What are Air Bearings?

An air bearing (or air caster) is a pneumatic device which forms a lubricating film of air between the load and floor surface, similar to that of a hovercraft or an air hockey table. A flexible, wear-resistant urethane diaphragm is inflated by compressed air, forming a seal with the floor and lifting the structure off its rest pads. Air is then squeezed between the floor and the diaphragm, creating a thin film of air and allowing the load to float.

On a smooth floor, this air film allows for nearly friction-free movement in any direction. With an excellent air bearing floor, the volume of air required can be very low, which results in a very efficient operation. When floating on air bearings, a 1000-lb. load can be moved with about one pound of force – that’s 10 times better than conventional wheels or casters.

When floating on air bearings, a 1000-lb. load can be moved with about one pound of force – that’s 10 times better than conventional wheels or casters.

Airfloat air bearings are constructed of a smooth-textured, completely homogeneous material. When pressured the bearing will stretch uniformly and closely follow the contours of the floor, maintaining a consistent air film. This is evident with lower drag forces and less air consumption than that produced by fabric-reinforced air bearings used by some Airfloat competitors.

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