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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A cylindrical bronze pin rests on a rotating alumina disk at a mean radius of 10 mm. The normal load on the pin is 20 N. The disk's rotational speed is 500 rpm, and the test lasts 5 hours. The pin and disk mass losses are 60 mg and 0 mg (i.e., assuming no mass loss on the alumina disc). Using the material data given below, calculate the wear coefficients for the bronze pin. (Hardness of bronze = 1 GPa, density of bronze = 8.5 Mg/m3; density of alumina = 3.95 Mg/m3).
a cylindrical bronze pin of 1mm radius rests on a rotating steel disk at a mean radius of 25mm. the normal load on the pin is 10n. the rotational speed of the disk is 300 rpm and the test last for 10 hrs. the mass losses of the pin and disk are 50 mg and 3 mg respectively. using the data given below, calculate the wear coefficients and wear depths for the bronze pin and steel disk.
hardness of bronze = 0.8 Gpa
hardness of steel = 2.5 Gpa
density of bronze = 8.5 mg/m3
density of steel = 7.8 mg/m3
A bronze bearing supports the steel shaft shown in the figure. The shaft has a Brinell hardness (HB) of 150 and a diameter of 30 mm. The bearing has a length of 30 mm. Estimate the depth of adhesive wear to expect from the shaft if it rotates at 200 rpm for 4 years (three 8-hour shift per day, 260-day per year) if the transverse load is 2000 N. Poor lubrication is expected between the shaft and the bearing.
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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