The reliability that meets the uses.
Answer to Problem 5P
The reliabilities that meets the uses are
Explanation of Solution
Write the expected reliability goal for each bearing.
Here, reliability of 02 series is
Write the expression for multiple of rating life for bearing.
Here, multiple of rating life for design is
Write the regression equation for bearing load life.
Here, the bearing load for design is
Write the equation for bearing life.
Here, the rating life in hour is
Write the equation for reliability along a constant load line.
Here, the characteristic parameter is
Write the expression for catalog rating in terms of application factor.
Here, catalog rating is
Write the expression for reliability for 02 series angular ball bearing.
Write the expression for reliability for 03 series angular ball bearing.
Write the expression for overall reliability.
Here, overall reliability is
Conclusion:
Substitute
Substitute
Substitute
Thus, the multiple of rating life of bearing is
Substitute
For ball bearing, the value of constant
Substitute
Substitute
Refer table 11-2 “Dimensions and Load Rating of Ball Bearing” to obtain the ball bearing at catalog rating of
Substitute
For 03 series cylindrical roller bearing:
Substitute
Substitute
Substitute
Substitute
For roller bearing, the value of constant
Substitute
Substitute
Refer to table 11-3 “Dimensions and basic Load Rating for cylindrical roller bearing:03 series” to obtain the cylindrical bearing at catalog rating of
Substitute
Substitute
Here,
Take
Substitute
Here,
Take
Substitute
Here,
Thus, the reliabilities that meets the uses are
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Chapter 11 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
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