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 12, Problem 22P
An Oiles SP 500 alloy brass bushing is 0.75 in long with a 0.75-in dia bore and operates in a clean environment at 70°F. The allowable wear without loss of function is 0.004 in. The radial load is 400 lbf. The shaft speed is 250 rev/min. Estimate the number of revolutions for radial wear to be 0.004 in.
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The shaft material is AISI 1040CD steel. The reliability of the design is 90%. The r/d for the shoulder is 0.02. If the design is not feasible, give reasons and suggest modifications. You do not have to consider any other failure criterion. You may assume that the torque is steady and the bending moment is fully reversed.
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A 76.2 mm diameter shafting of SAE 1040 grade, cold, rolled, having yield point of 50 ksi and with a ¾ x ¾ x 5 inches key. Compute the minimum yield point in the key in order to transmitt he torque of the shaft. The factor of safety to use is 2 and Sys = 0.5 Sy. (Ans: 47.12 ksi)
Chapter 12 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 12 - A full journal bearing has a journal diameter of...Ch. 12 - A full journal bearing has a journal diameter of...Ch. 12 - A journal bearing has a journal diameter of 3.000...Ch. 12 - Prob. 4PCh. 12 - Prob. 5PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - A full journal bearing is 28 mm long. The shaft...Ch. 12 - A 114114 in sleeve bearing supports a load of 700...
Ch. 12 - A full journal bearing has a shaft diameter of...Ch. 12 - Prob. 12PCh. 12 - Prob. 13PCh. 12 - A natural-circulation pillow-block bearing with...Ch. 12 - An eight-cylinder diesel engine has a front main...Ch. 12 - A pressure-fed bearing has a journal diameter of...Ch. 12 - Design a central annular-groove pressure-fed...Ch. 12 - Repeat design problem Prob. 1218 using the nominal...Ch. 12 - Table 12-1 gives the Seireg and Dandage curve fit...Ch. 12 - For Prob. 1218 a satisfactory design is...Ch. 12 - An Oiles SP 500 alloy brass bushing is 0.75 in...Ch. 12 - Prob. 23P
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- A hollow shaft has an inner diameter of 0.035 m and an outerdiameter of 0.06 m. Compute for the torque if the shear stress isnot to exceed 120 MPa in Nm.arrow_forwardA short stub shaft, made of SAE 1035, as rolled, receivers 30 hp at 300 rpm via a 12-in. spur gear, the power being delivered to another shaft through a flexible coupling. The gear is keyed (profile keyway) midway between the bearings. The pressure angle of the gear teeth 20o, N = 1.5 based on the octahedral shear stress theory with varying stresses. (a) Neglecting the radial component R of the tooth load W , determine the shaft diameter. (b) Considering both the tangential and the radial components, compute the shaft diameters. (c) Is the difference in the results of the parts (a) and (b) enough to change your choice of the shaft size?arrow_forwardProduced from xCy steel material by machining method, the shaft is bedded at C and D points. With the shaft, constant Fy= 820 N forces in the vertical direction and constant Fx= 4,2 kN forces in the axial direction, which do not rotate together. The tensile strength of the shaft material is (sigma)tensile = (sigma)ut = 620 MPa and the yield strength is (sigma)yield = 420 MPa. For 50% reliability, analyze the fatigue damage condition of the shaft sections A and B separately.arrow_forward
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- A protective flange coupling is used to connect two shafts and transmit 7.5 kW power at 720 rpm. The design torque is 150% of the rated torque. The shafts and bolts are made of plain carbon steel 30C8 (Syt = 400 N/mm2) and the factor of safety is 5. Assume, Syc = 1.5 Syt and Ssy = 0.5 SytThe flanges are made of cast iron.Calculate:(i) diameter of the shafts;(ii) number of bolts; and(iii) diameter of the bolts.arrow_forwardAn SAE 1040 Cold Drawn Steel shaft is subjected to a Torque of 1,200 Ib-ft. If the design factor N=2 and there is no bending moment (M=0). What should be the minimum diameter of the shaft ?arrow_forwardA 2" diameter shaft with a radial hole of 0.5" dia. is made of steel whose BHN=186. What is its fatigue-strength reduction factor if the shaft is to be subjected to pure torsion?arrow_forward
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