Circular Flat Vacuum Preloaded Air Bearings LRAVP300 / 615-15220

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The 3 inch diameter LRAVP300 air bearing allows translational or rotational motion in a plane while providing a vacuum preload force of about 24 pounds. The LRAV series air bearings allow for fewer bearing components when combined in an assembly to constrain motion to various degrees. With a nominal air gap of 5 microns, the LRAV series exhibit zero wear and no friction of the mating surfaces.

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User Instructions
Comparison Table
Load Capacity, lbs[N] 51 [224]
Stiffness, lbs/inch [N/µm] 235000 [41]
Vacuum Holding Force at Rated Vacuum, lbs[N] 24 [106]
Ball Seat Preload Force at Rated Vacuum, lbs[N] 15 [68]
Flow Rate, scfh [slpm] 2.9 [1.4]
Air gap, microinches [µm] 200 [5]
Natural Frequency*, Hz 212
Physical Properties:
Diameter, inches [mm] 3.0 [76.2]
Height, inches [mm] 0.8 [19.1]
Ball Seat Diameter, inches [mm] 0.630 [16.0]
Mating Ball Stem Model number R8M12
Air Bearing Surface Flatness, microinches [µm] 20 [0.5]
Air / Vacuum Supply fitting thread, imperial [metric] M5 [10-32]
Material Aluminum/porous carbon
Weight, lbs [N] 0.480 [2.1]
Installation Requirements:
Mating Surface Local Flatness, microinches [µm] 20 [0.5]
Mating Surface Roughness, microinches [µm] 16 [0.4]
Rated Vacuum, inHg [Mpa] 20 [.06]
Rated Supply Pressure, psig [Mpa] 80 [0.55]
Max. Supply Pressure, psig [Mpa] 100 [0.69]
Air Quality ISO Class 3 or better preferred
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