Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780077591670
Author: BUDYNAS
Publisher: MCG
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Chapter 11, Problem 2P
| 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 |
An angular-contact inner ring rotating, 02-series ball bearing is required for an application in which the life requirement is 40 kh at 520 rev/min. The design radial load is 725 lbf. The application factor is 1.4. The reliability goal is 0.90. Find the multiple of rating life xD required and the catalog rating C10 with which to enter Table 11-2. Choose a bearing and estimate the existing reliability in service.
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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.
b) Design a single row deep groove ball bearing with basic dynamic load rating of 33 KN to be used in a turbine to carry a radial load of 1584 N. The expected life of the bearing is 5591 hours at 529 rpm. Take k=3 for all types of ball bearings. Take the value of the shock load factor as 1.8. The radial and axial load factors are 1.3 and 1.6 respectively and the rotational factor is 1. Calculate:
i) Expected life of bearings in millions of revolutions
ii) Design equivalent dynamic load in N
iii) Basic equivalent dynamic load in N
iv) Axial load acting on the bearing in N
b) Design a self-aligning ball bearing with basic dynamic load rating of 69.5 KN to be used in the automobile industry to carry a thrust load of 1184 N. The expected life of the bearing is 5201 hours at 628 rpm. Take k=3 for all types of ball bearings. Take the value of the shock load factor as 1.7 and radial and axial load factors are 1.4 and 2.2 respectively, the rotational factor is 1. Calculate:
i) Expected life of bearings in millions of revolutions
ii) Design equivalent dynamic load in N
iii) Basic equivalent dynamic load in N
iv) Radial load acting on the bearing in N
Chapter 11 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
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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