2•Reading: Chapter 13 in “Machine Elements in Mechanical Design” 6thEdition•Homework Problems: 13-4, 13-6, 13-10, 13-113/8/2018MEC 410: Chapter 13: Tolerances
3•Chapters 7,8, 9, 10, 11 and 12 discussed how to specify pulleys, sprockets, gears, attach them to shafts, and then design the shafts•Chapter 13 will discuss how to fine tune the mating dimensions of all parts by specifying tolerances3/8/2018MEC 410 Chapter 13: TolerancesImage source: sites.google.com
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4•There is always statistical variance when manufacturing mechanical parts•Mating diameters of parts must have proper tolerances for interference or clearance fits•Common interference fits: bearings and high speed rotors mounted to shafts•Common clearance fits: balls within a bearing housing; gears, pulleys, and sprockets on shafts3/8/2018MEC 410 Chapter 13: Why Specify Tolerances?