MECH ENGINEERING DESIGN(LL)+ACCESS
10th Edition
ISBN: 9781260113952
Author: BUDYNAS
Publisher: MCG
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Chapter 7, Problem 39P
To determine
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Estimate the life in hours of a 02-30 mm angular-contact ball bearing subjected to 20,000 revolutions per cycle. Each cycle consists of a radial load of 15 kN for 6 min, and then a change in load to 25.05 kN for 4 min.
Determine the expected life of the bearing, in millions of revolutions, for each load, assuming the bearing has a C10 value of 20.3 kN.
The expected life of the bearing for 15 kN load is ___ × 106 revolutions.
The expected life of the bearing for 25.05 kN load is ____× 106 revolutions.
Dynamic load number C = 40500 N, revolution n = 840 rpm and Fr = 4500 of 6309 single row fixed radial bearing carrying N load; (a) Check and interpret whether it is selected correctly for Lh=20000 hours. (b) Calculate the dynamic load number of the bearing when the load remains the same and the life is doubled.
In a particular application, the radial load acting on a ball bearing is 5 kN and the expected life for 90% of the hearings is 8000 Calculate the dynamic load carrying capacity of the bearing, when the shaft rotates at 1450 rpm.
Chapter 7 Solutions
MECH ENGINEERING DESIGN(LL)+ACCESS
Ch. 7 - A shaft is loaded in bending and torsion such that...Ch. 7 - The section of shaft shown in the figure is to be...Ch. 7 - The rotating solid steel shaft is simply supported...Ch. 7 - A geared industrial roll shown in the figure is...Ch. 7 - Design a shaft for the situation of the industrial...Ch. 7 - The figure shows a proposed design for the...Ch. 7 - For the problem specified in the table, build upon...Ch. 7 - Prob. 8PCh. 7 - For the problem specified in the table, build upon...Ch. 7 - For the problem specified in the table, build upon...
Ch. 7 - In the figure is a proposed shaft design to be...Ch. 7 - The shaft shown in the figure is proposed for the...Ch. 7 - Prob. 20PCh. 7 - The shaft shown in the figure is proposed for the...Ch. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - A 25-mm-diameter uniform steel shaft is 600 mm...Ch. 7 - Prob. 29PCh. 7 - Compare Eq. (727) for the angular frequency of a...Ch. 7 - Prob. 31PCh. 7 - The steel shaft shown in the figure carries a...Ch. 7 - A transverse drilled and reamed hole can be used...Ch. 7 - Prob. 34PCh. 7 - The shaft shown in Prob. 721 is proposed for the...Ch. 7 - A guide pin is required to align the assembly of a...Ch. 7 - Prob. 37PCh. 7 - Prob. 38PCh. 7 - Prob. 39PCh. 7 - A ball bearing has been selected with the bore...Ch. 7 - Prob. 41PCh. 7 - A gear and shaft with nominal diameter of 35 mm...
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