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
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Chapter 7, Problem 41P
To determine
The dimensions for a
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15.)A full journal bearing has a journal diameter of 4.000in. with a unilateral tolerance of -0.004in. The bushing bore has a diameter of 4.004in and unilateral tolerance of +0.004in. the bearing is 3in long. The journal load is 3000 lbf and it runs at a speed of 400 rpm. What is the load per projected bearing area 9P) in psi?
Choose answer below
75
100
125
250
16.)For the bearing in problem #15, if the lubricant average viscosity is 9 ureym, what is the Sommerfield number (assuming minimum clearance)
Choose answer below
Between 0.6 and 0.7
Between 0.5 and 0.6
Between 0.3 and 0.4
Between 0.2 and 0.3
Use the provided tables to select an appropriate fit between the bearing inner ring (bore) and shaft and the
bearing outer ring and housing. Assume that the bearing bore is 100 mm and the outer diameter (outer
ring) is 140 mm. Justify your selection. Should you change this selection if the load change or RPM?
Also, calculate the maximum clearance in the housing and maximum interference on the shaft. What are
the bearing tolerances for the two diameters (d&D)?
Housing
Outer ring
Retained
Shaft
Inner ring
Rotating
Load
Problem (10): The following limits are specified in a limit system, to give a clearance fit between a hole and a shaft: Hole = 10 (+0.05 )/(-0.00 ) mm and Shaft = 10 (-0.003)/(-0.010) mm. Determine the basic size, tolerance and allowance, maximum and minimum clearances, type of fit.
Chapter 7 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
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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- (Q) A deep groove ball bearing is subjected to radial load of 5 kN and axial load of 2 kN. It rotates at 760 rpm. Shaft diameter should not be less than 50 mm and life has to be minimum 22,000 hours. Select a suitable bearing. wwwarrow_forward10. The design life of a bearing used in a shaft of an industrial blower is around 20,000 h. How many number of revolutions is this equal to if the shaft rotates at 600 rpm? 3 x 108 6 x 108 4 x 108 7 x 108 a. b. 11. For a D/d ratio of 1.5, which combination of fillet radius and smaller shaft diameter will you consider it as a well rounded fillet? 0.4 and 20.0 b. 2 and 10.5 a. b. C. d. 12. Which combination of sheave diameters and center of less than 9.5 inches? 2, 8, 10 2.5, 10, 10 C. d. c. d. 3.0 and 100 both b and c distance results in a length of span between two sheaves 4, 10, 10 Answer is not among the choicesarrow_forwardFind the bearing rated life, in hours, of the bearing with the shortest expected life in the figure given the following data: Bearing A: 30204 (pp 694 in the SKF catalogue)Bearing B: 30206 (pp 694 in the SKF catalogue)FrA: 3.6 kNFrB: 4.52 kNKa: 1.44 kNn: 1157 rpmarrow_forward
- Calculation of Limits using ANSI B4.1 Standard Tables, when one of the design Features Exists. When calculating the limit tolerances for features that mate with purchased parts, the purchased part size must be known. This may be obtained be requesting a drawing from a vendor or, a caliper or micrometer can be used to obtain an accurate size. A shaft diameter of 1.2500" is to be pressed into a part using a FN3 interference (force) fit. Limits of size for the shaft diameter are 1.2500" and 1.2495". Determine the Limits of the hole diameter. Show all work.arrow_forwardAsaparrow_forwardFor nominal diameters d = 40 mm and d = 80 mm, determine one interference fit according to the unit hole system.(Table A-3.2-11 and Table A-3.2-12). Calculate the tolerance factors for your chosen fit.arrow_forward
- II. Provide complete solutions per problem. No need to copy the problem butprovide the ff format: (a) given (b) required (c)solution 1. A journal of basic size of 75 mm rotates in a bearing. The tolerance for both the shaftand bearing is 0.075 mm and the required allowance is 0.10 mm. Find the dimensions ofthe shaft and the bearing bore. 2. A medium force fit on a 75 mm shaft requires a hole tolerance and shaft tolerance eachequal to 0.225 mm and average interference of 0.0375 mm. Find the hole and shaftdimensions.arrow_forwarda. The following illustration shows the shaft and housing fits for a bearing system. The bottom half of the chart is the shaft fit section and the top half is the housing fits for bearing. Explain this illustration (What this illustration is trying to convey?). discuss (these blocks, F, G, H,..etc) What does these blocks represent? On what basis should you select clearance or interference fit for a bearing? Why is it important? For illustration only Ier Ring Oue Ring Bere Dameter Housing Bearing MMIMT Outer ring tolerance Clearae Tratn Terferene Clece Tioe fesne ft Inner ring tolerance Shaftarrow_forwardWhat minimum dynamic load rating is required for a deep groove bearing that is required to have a lifetime of 6.5 million revolutions while undergoing an equivalent radial load of 3.9 kN? Assume a reliability level of 90%. Express your answer in units of kilonewtons. Type your answer... 加arrow_forward
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