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Calculating PV for a Plain Linear Bearing
Plain Linear Bearing PV Calculation (Pressure Velocity)

Plain Linear Bearing PV Calculation (Pressure Velocity)

Calculating PV for a Plain Linear Bearing

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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PV Figure 1
PV Figure 2

Calculate V

V = Maximum velocity or surface speed in square feet per minute (sfm) or meters per minute (m/min)
Linear velocity = total distance traveled in one minute
Rotational velocity =

Plain Linear Bearing Calculation for PV

where n = Rotational speed

Calculate PV

PV = The performance measurement of plain bearings

Plain Linear Bearing Pressure Velocity
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Source: PBC Linear - “Calculating PV for a Plain Linear Bearing”
https://pbclinear.com/blogs/blog/calculating-pv-for-a-plain-bearing
Last updated: September 2025