The sliding velocity for bushings and thrust washers results from the equation:

v = 5.82 × 10^{-7}× d × ß × f

Where:

v

sliding velocity, m/s

d

bore diameter of bushing mm
= mean diameter of thrust washer mm
(dimension J in bearing tables)

f

angular frequency or rotational frequency, min^{-1}

ß

half turning angle in degrees (see illustration bottom)
= 90° in case of rotational movement

Drawing turning angle

The complete oscillation = 4 ß
i.e., from point 0 to 4

Determination of bearing size

Sliding Velocity Factor c_{2}

Increasing sliding velocity will lead to increased heat generation in the sliding surface; the wear rate increases. Therefore, the velocity factor c_{2} has to be considered when designing the bearing.