MECH ENGINEERING DESIGN(LL)+ACCESS
10th Edition
ISBN: 9781260113952
Author: BUDYNAS
Publisher: MCG
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Chapter 11, Problem 6P
| Manufacturer | Rating Life, Revolutions | Weibull Parameters Rating Lives | ||
| x0 | θ | b | ||
| 1 | 90(106) | 0 | 4.48 | 1.5 |
| 2 | 1(106) | 0.02 | 4.459 | 1.483 |
A straight (cylindrical) roller bearing is subjected to a radial load of 20 kN. The life is to be 8000 h at a speed of 950 rev/min and exhibit a reliability of 0.95. What basic load rating should be used in selecting the bearing from a catalog of manufacturer 2 in Table 11-6?
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A 02-series single-row deep-groove ball bearing is to be selected from Table 11–2 for the application conditions specified in the table. Assume Table 11–1 is applicable if needed. The value of radial load Fr = 8 kN, axial load Fa = 2 kN, design life LD = 2.40(108), ring rotation factor V = 1, and reliability RD = 0.98.
Assuming that the values taken from Table 11–1 are X = 0.56 and Y = 1.63, determine the equivalent radial load rating for this application.
What is the equivalent radial load rating for this application in kN?
A certain application requires a ball bearing with the inner ring rotating, with a design life of LD = 15 kh at a speed of nD = 480 rev/min. The radial load is Fr = 1.4 kN, the axial load Fa = 0.4 kN, and an application factor of af = 1.2 is appropriate. The reliability goal, R = 0.99.
a) Determine the multiple of rating life required, xD, and the catalog rating C10FR, where FR is the calculated bearing load in [kN] with which we enter a bearing table.
Specify a 02-series angular contact ball bearing from Table 11–2,
b) Estimate the reliability (R) and multiple of rating-life (XD) in use.
...Which of the following is the rating life for a ball bearing with total expected life of 20 x 106 revolutions at 99% reliability?
Group of answer choices
37 x 10^6 rev
79 x 10^6 rev
2.7 x 10^6 rev
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Chapter 11 Solutions
MECH ENGINEERING DESIGN(LL)+ACCESS
Ch. 11 - Manufacturer Rating Life, Revolutions Weibull...Ch. 11 - Manufacturer Rating Life, Revolutions Weibull...Ch. 11 - Manufacturer Rating Life, Revolutions Weibull...Ch. 11 - Problems 112 and 113 raise the question of the...Ch. 11 - Prob. 5PCh. 11 - Manufacturer Rating Life, Revolutions Weibull...Ch. 11 - Two ball bearings from different manufacturers are...Ch. 11 - 11-8 to 11-13 For the bearing application...Ch. 11 - 11-8 to 11-13 For the bearing application...Ch. 11 - 11-8 to 11-13 For the bearing application...
Ch. 11 - 11-8 to 11-13 For the bearing application...Ch. 11 - 11-8 to 11-13 For the bearing application...Ch. 11 - 11-8 to 11-13 For the bearing application...Ch. 11 - A countershaft carrying two V-belt pulleys is...Ch. 11 - A countershaft carrying two V-belt pulleys is...Ch. 11 - A countershaft carrying two V-belt pulleys is...Ch. 11 - A countershaft carrying two V-belt pulleys is...Ch. 11 - For the shaft application defined in Prob. 3-77,...Ch. 11 - For the shaft application defined in Prob. 3-79,...Ch. 11 - An 02-series single-row deep-groove ball bearing...Ch. 11 - An 02-series single-row deep-groove ball bearing...Ch. 11 - 11-22 to 11-26 An 02-series single-row deep-groove...Ch. 11 - 1122 to 1126 An 02-series single-row deep-groove...Ch. 11 - 1122 to 1126 An 02-series single-row deep-groove...Ch. 11 - 1122 to 1126 An 02-series single-row deep-groove...Ch. 11 - 1122 to 1126 An 02-series single-row deep-groove...Ch. 11 - The shaft shown in the figure is proposed as a...Ch. 11 - Repeat the requirements of Prob. 11-27 for the...Ch. 11 - The shaft shown in the figure is proposed as a...Ch. 11 - Repeat the requirements of Prob. 11-29 for the...Ch. 11 - Shown in the figure is a gear-driven squeeze roll...Ch. 11 - The figure shown is a geared countershaft with an...Ch. 11 - The figure is a schematic drawing of a...Ch. 11 - A gear-reduction unit uses the countershaft...Ch. 11 - The worm shaft shown in part a of the figure...Ch. 11 - In bearings tested at 2000 rev/min with a steady...Ch. 11 - A 16-tooth pinion drives the double-reduction...Ch. 11 - Estimate the remaining life in revolutions of an...Ch. 11 - The same 02-30 angular-contact ball bearing as in...Ch. 11 - A countershaft is supported by two tapered roller...Ch. 11 - For the shaft application defined in Prob. 3-74,...Ch. 11 - For the shaft application defined in Prob. 3-76,...Ch. 11 - Prob. 43PCh. 11 - The gear-reduction unit shown has a gear that is...
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