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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Determine the limits of sizes, tolerances and fundamental deviations for the shaft designated as 40 H8 / f7
Calculate the basic rating life at 90% reliability for the following cylindrical roller bearing and conditions.Fr 5.05 kNFa 3.12 kNBearing: NU 1010 ECP (on pp 522 in the SKF catalogue)Clearance: Normal
Give the answer in millions of revolutions.
Verify if my answers are correct:
P =1000 N
Q =1300 N
C =216000 N.mm
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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- You are asked to design a plain surface journal bearing to carry a steady radial load of 5.75 kN while the shaft rotates at 950 rpm. The shaft stress analysis determines that an acceptable nominal diameter of the journal is 62.5-mm and an l/d ratio is 1. The shaft is part of a machine requiring good precision. So a minimum radial clearance cmin= 0.040 mm seems appropriate. We shall use SAE 30 oil as a lubricant, at an inlet temperature of 45 oC. Analyze the hypothetical bearing,a) Determine the operating temperature Tave, and operating viscosity μave. b) Determine the minimum film thickness, ho, temperature rise of the lubricant, ΔTC, the total oil flow, Q, and side flow Qs in [mm3/s], the maximum film pressure Pmaxdeveloped in [MPa]. c) Determine the power loss, Hloss in [W], friction torque, Tf in [N-m] d) For minimum radial clearances, perform a design assessment using Trumpler’s criteria.arrow_forwardIt has a full-slide type bearing rotating at a speed of 1975 rpm.A load of 5693 N is applied. SAE 40 oil in bearing at 60C inlet temperatureplanned to be used.Shaft and bushing diameters in bearing with tolerance data 41−0.010 respectively+0.000mmand 41.125−0.000+0.100 mm.Average radial clearance mounting for this bearing with bush length 20.50 mmCalculate the following;a) Bearing characteristic number,b) Minimum lubricant film thickness,c) Eccentricity value,d) coefficient of friction,e) Average oil film temperature andf) Find the Tmax temperature value.arrow_forwardA marine engine cylinder has a compression ratio (r) of 9.5, a clearance volume of 650 cm3 and a piston stroke length of 675 mm. What is the bore diameter in millimetres (mm) for the engine cylinder. Give your answer to the nearest millimetre mm.arrow_forward
- engineering tolerance: A solid steel shaft with a diameter of 130 mm must be press-fitted in a journal bearing with an inlet and outlet diameters of 130 and 145 mm, respectively. Both solid shaft and journalbearing require rigidity and alignment with an accuracy of the location. Consider a journal bearinginlet diameter as the basic size. determine 1. the tolerance limits for both the solid steel shaft diameter and the journal bearing inlet diameter2. the dimensions of both the solid steel shaft diameter and the journal bearing inlet diameterarrow_forward....A 150-mm diameter shaft supports a load of 12 kN. The shaft runs in a bearing whose length is 1.5 times the shaft diameter. Which of the following is the bearing pressure? Group of answer choices 0.127 MPa 0.296 MPa 0.356 MPa 0.170 MPaarrow_forwardDetermine the diameter of a main power transmitting shaft in mm to transmit 114 kW at 430 rpm using PSME code for shaft design. Note: Use 1 kW = 1.34 hp and 1 in = 25.4 mmarrow_forward
- ....The rating life at 90% reliability for a ball bearing is 15 x 106 revolutions. If the bearing is subjected to an equivalent radial load of 2000 N, which of the following is its dynamic load rating? Group of answer choices 4506 N 4932 N 1890 N 1665 Narrow_forwardDetermine the power in kilowatts transmitted by the solid shaft if the radius is 7.5mm and it rotates with revolution of 188.78 RPS. Maximum torsional stress equivalent to 50000 kPa. Note: Answer must be round-off to two decimal placesarrow_forwardData:P = 2 kipd = 3.6 inchw = 305 millimeterst = 0.03 meterr = 5.08 centimeterh = 0.6667 feet a) Calculate the maximum static stress in the material (in MPa). b) Estimate the theoretical stress concentration factor at the fillet c) Estimate the theoretical stress concentration factor at the holearrow_forward
- 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 0.3arrow_forwardOn section view AAa) What type of bearing is it?b) Is the assembly of these bearings rotating shaft or rotating hub?c) Is the mounting of the bearings in X, in O, …?d) Which rings (inner or outer) are mounted with interference?e) How many stops on the shaft are blocked?f) How many stops in the bore are blocked?g) Give the average tolerance of the seats of the inner rings located on the shaft.h) Give the average tolerance of the seats of the outer rings located on the bore.arrow_forwardThe armature shaft of a 50 kW, 580 rpm electric motor, mounted on two bearings A and B, is shown in Fig. The total magnetic pull on the armature is 5 kN and it can be assumed to be uniformly distributed over a length of 400 mm midway between the bearings. The shaft is made of steel with an ultimate tensile strength of 770 N/mm2 and yield strength of 580 N/mm2. Determine the shaft diameter using the ASME code if, kb=1.5 and kt=1.0 Assume that the pulley is keyed to the shaft.arrow_forward
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