Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780073398204
Author: Richard G Budynas, Keith J Nisbett
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 11, Problem 42P
For the shaft application defined in Prob. 3-76, p. 153, perform a preliminary specification for tapered roller bearings at A and B. A bearing life of 500 million revolutions is desired with a 90 percent combined reliability for the bearing set, assuming distribution data from manufacturer 1 in Table 11-6. Should the bearings be oriented with direct mounting or indirect mounting for the axial thrust to be carried by the bearing at A? Assuming bearings are available with K = 1.5, find the required radial rating for each bearing. For this preliminary design, assume an application factor of one.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
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.
3. A flat annular steel flywheel of outer radius 0.5 m and inner radius 0.125 m with p = 7800 kN*s?/m*
and v = 0.3 is to be shrunk fit around a solid steel shaft. The shrinking allowance is 0.1 mm. Both
materials are the same type of steel with E = 210 GPa. Determine the RPM when the shrink fit loosens
as a result of rotation.
Figure below shows a rotating shaft simply supported in ball bearings at A and D and loaded by a nonrotating
orce Fof 6.8 kN. Using ASTM "minimum" strengths, estimate the life of the part.
6T
td7 (a) Shaft drawing showing all dimensions in millimeters;
all fillets 3-mm radius. The shaft rotates and the load
is stationary; material is machined from AISI 1050
cold-drawn steel.
(b) Bending moment diagram.
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...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- A 6-in-wide polyamide F-1 flat belt is used to connect a 4-in-diameter pulley to drive a larger pulley with an angular velocity ratio of 3. The center-to-center distance is 8 ft. The angular speed of the small pulley is 1850 rev/min as it delivers 2 hp. The service is such that a service factor Ks of 1.25 is appropriate. (a) Find Fc, Fi, F1a, and F2. (b) Find Ha, nfs, and belt length. (c) Find the dip.arrow_forward2. A steel shaft rotating at 600 rpm is supported by two bearings as shown. E=30 Msi, d=1.0" (inch), L₁=24.0" (inches), L=42" (inches), W₁-50 lb, Neglect the weight of the shaft. "The design is acceptable." True ? Show details. or False Diameter d W₁arrow_forwardConsider a double hook, thaving intermediate shaft of moment of inertia 3 g-m², the input and output shaft of which are in clined at 30° to intermediate shaft. The input shaft rotates uniformly at 2400 rpm with steady torque of 300 N.m., determine max. fluctuation in output torque.arrow_forward
- Answer this ASAP plz A double row angular contact ball bearing is used in the engine compressor to accept radial loads of 6000 N and axial loads of 3000 N, operating at 2400 rpm for an average life of 7 years at 8 hours per day. Assume that the shock load is light. Select the appropriate bearing number. Note: the equivalent dynamic load is the dynamic equivalent radial load times the service factor.arrow_forwardA shaft is made from solid material of density 7800 kg/m and E= 210 GN/m? to be applied for this question. a) The shaft of 15mm diameter is to be supported in self-aligning bearings. If the shaft is required to rotate at 7000 rev-min determine the greatest distance of unsupported length if the shaft is not to whirl. b) The shaft of 12 mm diameter is supported in 'long' bearings at both ends, which are 0.6m apart. i) Determine the first three whirling speeds for the shaft. ii) In order to provide additional stability to the shaft by fitting a 'short' self-aligning bearing at mid-span of the shaft, show that this will shift the first whirling speed to be effectively the same as the second whirling speed, without the mid-bearing.arrow_forwardA bearing is subjected to a radial force of 8kN and a thrust force of 3 kN. Thevalues of X and Y factors are 0.56 and 1.5 respectively. The shaft rotates at 1200 RPM. The diameter of the shaft is 75mm and Bearing no. 6315 (C= 112000N) is selected for this application. Estimate the life of this bearing with 90% reliability.arrow_forward
- A solid constant-diameter circular shaft is subjected to the torques of TA = 480 lb-ft, TB = 1060 lb-ft, Tc= 860 lb-ft, and Tp = 280 lb-ft, acting in the directions shown. The bearings shown allow the shaft to turn freely. (a) Plot a torque diagram showing the internal torque in segments (1), (2), and (3) of the shaft. Use the sign convention presented in %D Section 6.6. (b) If the allowable shear stress in the shaft is 5800 psi, what is the minimum acceptable diameter for the shaft? TB TA Tc (1) Tp (3) В C D Answer: (a) T1 = Ib-ft T2 = Ib-ft T3 = Ib-ft (b) d = in.arrow_forwardA horizontal shaft AD supported in bearings at A and B and carrying pulleys at C and D is totransmit 75 kW at 500 r.p.m. from drive pulley D to off-take pulley C, Calculate the diameter of shaft. The data given is : P1 = 2 P2 (both horizontal), Q1 = 2 Q2 (bothvertical), radius of pulley C = 220 mm, radius of pulley D = 160 mm, allowable shear stress = 45 MPa.[Ans. 100 mm] Given CD=350mm CA=100mm AB=150mm BD=100mmarrow_forwardQ/A shaft 1.3m long carries three unbalanced wheels, 1, 2, and 3 spaced at 0, 0.7, and 1.3m from one end respectively. The masses are 8,10, and 6kg, and the eccentricities of the centres of mass are 60, 50 and 40 mm respectively. The directions of the eccentricities of 2 and 3 relative to 1 are 60° and 270° respectively. The shaft is supported in bearing A and B which are 0.2 m and 1m from 1. 1- Find the forces on the bearings, in magnitude and direction, when the shaft rotates at 90 r.p.m. 2- A mass is to be bolted to the wheel 3 at a radius of 100 mm to make the forces on the bearing equal and opposite. Find the mass required and its angular position. 3- What is the maximum speed at which the shaft may run, to ensure that the vertical component of the load on F is always downwards?arrow_forward
- The gear forces shown act in planes parallel to the yz plane. The force on 20 in gear A is 300 lbf. Consider the bearings at O and B to be simple supports. For a static analysis and a factor of safety of 3.5, use both the DET and 16 in the MSST to determine the minimum safe diameter of the shaft. 10 in Consider the material to have a yield strength of 60 ksi. Gear A Solution: 24-in D. Gear C 10-in D. 20°arrow_forwardFor the free body diagram of the shaft shown below, the rolling contact bearings are located at A and C. For the bearing at A, the desired design load for the bearing is Tangential Direction for Gear Y-X axes: Radial Direction for Gear Z-X axes: 1000 Ibf 500 Ibf A A В 500 Ibf 500 Ibf 250 Ibf 250 Ibfarrow_forwardA mechanism used in a punchingmachinery consists of a tension spring assembled with a preload of 30 N. The wire diameter of spring is 2 mm with a spring index of 7. The spring has 10active coils. The spring wire is hard drawn and oil tempered having the following material properties:Design shear stress = 780 MPa Modulus of rigidity = 80 kN/mm2Identify (a) the initial torsional shear stress in the wire, (b) the spring rate, and (c) the force to cause the body of the spring to reach its yield strength.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
BEARINGS BASICS and Bearing Life for Mechanical Design in 10 Minutes!; Author: Less Boring Lectures;https://www.youtube.com/watch?v=aU4CVZo3wgk;License: Standard Youtube License