fe_02f - ME 466 - Machine Design Fall Semester, 2002 Final...

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ME 466 - Machine Design NAME ____________________________________ Fall Semester, 2002 Final Exam, 200 Points, Open Book 1. (20 Points) An ordinary deep groove ball bearing is to be used on a shaft at a location where the radial load is twice the axial load. The bearing used at this location is a 30 mm bore light series bearing (206). It is desired to have no more than 2% failures in 5 years when operating at 1000 rpm for 8 hours a day, 300 days per year. The shaft is machined from 1.50 inch diameter 1020 steel rod. It is considered a moderate to heavy impact loading. Determine the maximum radial load that can be applied. Radial Load: _____________ 2. (20 Points) Determine the minimum yield strength which a steel beam must have to not permanently yield when a 20 pound weight is dropped on the end of it from a height of 4.00 inches as shown. (S y ) min = ______________ 3. (10 Points) The shown shaft has been machined from 4140 steel and then heat treated by oil quenching and tempering at 900 ° F. What is the design fatigue strength of this shaft if it is to operate for 200,000 revolutions? Strength: _______________
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fe_02f - ME 466 - Machine Design Fall Semester, 2002 Final...

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