Influences on the service life

Wear and service life of the slide bearings are dependent on the following:

·Specific bearing load

·Sliding speed

·PV value

·Roughness depth of the mating surface

·Mating surface material and Temperature etc.

With the exception of being burnt,the service life of self-lubricating bushing depends on the abrasion degree of the bushing's inner diameter.In conditions like dry friction,boundary lubrication and oil lubrication,the abrasion of thesame bushing will be different.Main factors that may influence he service life are:character and direction of the load,lubrication condition,running speed,environment temperature, hardness of the mating axis,oughness of the mating surface,material of the mating axis, air quality around etc. Therefore, it's difficult to calculate the actual abrasion quantity.Regardless the factors like influence from the load and speed, difference caused by running direction, kinds of lubricating oil,mating clearance,oughness and impurities penetration degree,the abrasion W can be calculated by the following formula.

W=K·P·V·T (mm2)

P:Load pressure(N/mm2)

V:Running velocity(m/s);

K:Abrasion coefficient(mm/(N/mm2·m/s·Hr))

T:Running time(Hr)

Abrasion coefficient K gained under different lubrication conditions in the laboratory.Consult the following form for K value.