Circular Flat Vacuum Preloaded Air Bearings LRAVP400 / 615-15222

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The circular LRAVP400 air bearing has a stiffness of 350,000 pounds per inch and supports loads of over 90 pounds. A vacuum pocket provides nearly 50 pounds of holding force to the mating surface while exhibiting frictionless, accurate, linear or rotary motion in a plane. Typical for air bearings of this type, the LRAV series bearings are more accurate than even the finest rolling element bearings by orders of magnitude.

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User Instructions
Comparison Table
Load Capacity, lbs[N] 93 [409]
Stiffness, lbs/inch [N/µm] 347000 [60]
Vacuum Holding Force at Rated Vacuum, lbs[N] 48 [213]
Ball Seat Preload Force at Rated Vacuum, lbs[N] 15 [68]
Flow Rate, scfh [slpm] 3.5 [1.6]
Air gap, microinches [µm] 200 [5]
Natural Frequency*, Hz 191
Physical Properties:
Diameter, inches [mm] 4.0 [101.6]
Height, inches [mm] 0.8 [20.8]
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] 0.939 [4.1]
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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