Plain linear bearings are evaluated for application suitability using their pressure velocity (PV) value, which combines load per unit surface area (pressure) and sliding speed (velocity). The maximum PV capacity determines performance limits. For unlubricated use, three parameters must be met: the bearing’s PV must exceed the application’s PV, the operating temperature must stay within material limits, and the shaft surface must ensure low friction compatibility.
Calculate P
P = Maximum pressure or load in pounds per square inch (psi) or kilograms per square centimeter (kg/cm2)
Pressure is over the projected area of load where:
A = Projected Contact Area
L = Bearing Length
d = Shaft diameter
W = Maximum load
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