Question: A device contains two bearings is to operate at 300 rev/min, 8 hours per day, 5 days per week for 5 years with a reliability of 0.99. The design load is 2000 N and an application factor of...

Machine Elements

Extracted text: Question: A device contains two bearings is to operate at 300 rev/min, 8 hours per day, 5 days per week for 5 years with a reliability of 0.99. The design load is 2000 N and an application factor of 1.2 is appropriate. Find the catalog rating C10 a) For ball bearings b) For roller bearings The Weibull parameters are xo = 0.02, (0 – xo) = 4.439, and b = 1.483. Use SI units. Take the relations as 1/a Xp C10 = af Fp + (ө — хо)(1 — Rp)4/Ь] and Lonp60 Xp = LR Where the subscripts D: desired R: rating f: factor