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
Concept explainers
Videos
Textbook Question
Chapter 11, Problem 41P
For the shaft application defined in Prob. 3-74, p. 152, perform a preliminary specification for tapered roller bearings at C and D. A bearing life of 108 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 C? 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 solution
Students have asked these similar questions
A Self-aligning medium series bearing for bores of 85 mm is operating at 300 r.p.m for an average life of 9 years at 10 hours per day, is acted by a 15 kN radial load and 10 kN thrust load. The bearing is subjected to a light shock load and the inner ring is sationary.
Determine the suitable self-aligning bearing. Mention the advantage of using self align bearing.
The corediameter of the double start square threaded screw having a pitch of 12mm is 50 mm. A load of 18kN is lifted through a distance of 180mm. Find the work done(in Joule)in lifting the loadand the efficiency of the screw, when
1. The load rotates with the screw, and
2. The load rests on the loose head which does not rotate with the screw.
The external and internal diameter of the bearing surface of the loose head are 60 mm and 10 mmrespectively. The coefficient of friction for the screw is 0.11,whilefor the bearing surface is 0.13.
A compound shaft supports several pulleys. Segments (1) and (4) are solid 21-mm-diameter steel [G = 61 GPa] shafts. Segments (2) and (3) are solid 50-mm-diameter steel shafts. The bearings shown allow the shaft to turn freely. Assume L1=745 mm, L2=400 mm, L3=725 mm, L4=515 mm, TA=130 N-m, TB=2015 N-m, TC=1540 N-m, TD=580 N-m, TE=235 N-m.(a) Determine the maximum absolute value of the shear stress in the compound shaft.(b) Determine the rotation angle of pulley D with respect to pulley B.(c) Determine the rotation angle of pulley E with respect to pulley A.
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 flywheel of mass 120 kg and radius of gyration 450 mm is rotating at 760 r.p.m. It is brought to rest by means of block brake system as shown in the figure. The mass of the brake drum assembly is 5 kg. The brake drum is made of cast iron having specific heat 470 J / kg°C. and the brake system provides a braking torque of 380 N-m. If the diameter of brake drum is 300 mm, the coefficient of friction is 0.35. find 1. The force (P) to be applied at the end of the lever for the clockwise rotation of drum. 2. Assuming that the total heat generated is absorbed by the brake drum only, calculate the temperature risearrow_forwardThe worm shaft shown in the figure transmits 1-kW at 500 rev/min. A static forceanalysis results are also shown in the figure. Bearing A is to be an angular-contact ballbearing mounted to take the 2.75 kN thrust load. The bearing at B is to take only theradial load, so a straight roller bearing will be employed. Use an application factor of1.2, a desired life of 25 kh, and a combined reliability goal of 0.99. (a)Specify each bearing by giving all required charecteristics. (b) Determine the radial and thrust components of loads on each bearing. (c) Make a design assessment for each bearing and of the system.arrow_forwardA hand cranking lever, as shown in Figure 6 below, is used to start a truck engine byapplying a force F = 400 N. The material of the cranking lever has a yield strength = 320 MPa;Ultimate tensile strength = 500 MPa; Young’s modulus = 205 GPa; Modulus of rigidity = 84 GPaand poisson’s ratio = 0.3. Assuming factor of safety to be 4 based on yield strength, design thediameter of the lever at section X-X near the guide bush using: a) Maximum distortion energytheory; and b) Maximum shear stress theory.arrow_forward
- Read the question carefully and give me all right solutions. Internal torque at rod 1 (kip-ft) Magnitude of shear at rod 2 & 3(ksi) Rotation angle at rod 1 (deg) Rotation angle at flange C (deg)arrow_forwardA 1.5 in diameter 10-spline shaft and permanent fit has a compressive force of 2000 lbs. Find the torque applied if hub length 2 in.arrow_forwardAn engine of a motor vehicle with a wheel diameter of 712 mm develops 50 kW at 2,000 rpm combined efficiencyof the differential and transmission is 75% with an over-all speed reduction to. 1 determine he torque to bedelivered by the clutch N-m.arrow_forward
- A ball bearing with a dynamic load capacity of 22.8 kN is subjected to a radial load of 29kN. Calculate (i) the expected life in million revolutions that 90% of the bearings will reach; (ii) the corresponding life in hours, if the shaft is rotating at 1450 rpm; and (iii) the life that 50% of the bearings will complete or exceed before fatigue failure.arrow_forwardA borehole drilling machine with a vertical shaft of 60 mm diameter is 500 mm long and is supported in long bearings at its top end. The shaft has Youngs modulus of E = 110 GN/m2. A disc of mass 40 kg is attached to the center of the shaft. The center of the disc is 0.25 mm from the geometric axis of the shaft. Neglecting any increase in stiffness due to the attachment of the disc to the shaft, calculate: 1.1. The critical speed of rotation. 1.2. The maximum bending stress when the shaft is rotating at 80% of the criticals peed.arrow_forwardThe motor shown in the figure supplies 16.5 kW at 1540 rpm at A. Shafts (1) and (2) are each solid 28 mm diameter shafts. Shaft (1) is made of an aluminum alloy [ G=26 GPa], and shaft (2) is made of bronze [ G=45 GPa]. The shaft lengths are L1=3.3m and L2=2.9m, respectively. Gear B has 56 teeth, and gear C has 97 teeth. The bearings shown permit free rotation of the shafts. Determine: the rotation angle of gear D with respect to flange A. [Answer φD/A = 0.314 rad]arrow_forward
- In the figure, shaft AB transmits power to shaft CD through a set of bevel gears contacting at point E. The contactforce at E on the gear of shaft CD is determined to be (FE)CD = –92.8i – 362.8j + 808.0k lbf. For shaft AB: (a) draw afree-body diagram and determine the reactions at C and D assuming simple supports (assume also that bearing Acarries the thrust load), (b) draw the shear-force and bending-moment diagrams, (c) for the critical stress element,determine the torsional shear stress, the bending stress, and the axial stress, and (d) for the critical stress element,determine the principal stresses and the maximum shear stress.arrow_forwardA shaft supported between two bearings 750 mm apart, receives 12.5 kW power at 300 rpm through a coupling located to the left of left-hand bearing. It transmits the power to a belt pulley of weight 300 N and diameter 450 mm, which is located at 200 mm to the right of right-hand bearing. The ratio of belt tensions of tight and slack sides is 2:1. The belt tensions act in vertically downward direction. The shaft material has a yield strength of 300 MP & an ultimate tensile strength of 550 MPa . The combined shock & fatigue factor for bending & torsion are 1.5 & 1 respectively. Determine the shaft diameter using ASME code.arrow_forwardPls answer thank you! A 2 in diameter 6-spline shaft ( d= 0.85D, W= 0.25D, h= 0.075D ) and to slide when not under load has a compressive force of 2500 lbs. Find the torque applied if hub length is 2 1/2 in.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Mechanical Design (Machine Design) Clutches, Brakes and Flywheels Intro (S20 ME470 Class 15); Author: Professor Ted Diehl;https://www.youtube.com/watch?v=eMvbePrsT34;License: Standard Youtube License