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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 2024 N and an application factor of 1.2 is appropriate. Find the catalog rating C10

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 2024 N and an application factor of 1.2 is appropriate. Find the catalog rating C10

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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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 2024 N and an application factor of 1.2 is appropriate. Find the catalog rating C10

 

  1. For ball bearings
  2. For roller bearings

 

The Weibull parameters are and Use SI units. Take the relations as

 

 

and

 

 

Where the subscripts

D: desired

R: rating

f: factor

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 2024 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 x, = 0.02, (8 – x,) = 4.439, and b = 1.483. Use SI units. Take the relations as Xp 11/a FD + (8 – x,)(1 – R,) and Lon,60 Xp LR Where the subscripts D: desired R: rating f. factor
Transcribed Image 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 2024 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 x, = 0.02, (8 – x,) = 4.439, and b = 1.483. Use SI units. Take the relations as Xp 11/a FD + (8 – x,)(1 – R,) and Lon,60 Xp LR Where the subscripts D: desired R: rating f. factor
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