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Calculation of service life

Describes a method to calculate an estimated wear amount to estimate the service life of bearings based on the conditions such as a load, velocity, etc.

Service life of OILES bearing in designing them

Service life of Oiles bearings depends on application atmosphere and other relevant conditions. Below formula is determined from the relationship between the load and the sliding distance and should be regarded as rough standard for designing.

Assumed wear amount(mm) : W=K×P×V×T

Specific wear amount K
mm/(N/mm2・m/s・hr){mm/(kgf/cm2・m/min・hr)}
Design pressure P
N/mm2{kgf/cm2}
Sliding velocity V
m/s{m/min}
Sliding hours T
hr

Specific wear rate depending on lubrication conditions

Lubrication conditions mm/(N/mm2・m/s・hr) mm/(kgf/cm2・m/min・hr)
Dry 3×10-3~6×10-4 1~5×10-6
Periodic lubrication 3×10-4~6×10-5 1~5×10-7
Oil lubrication 3×10-5~6×10-6 1~5×10-8

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