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7_ch 11 Mechanical Design budynas_SM_ch11

# 7_ch 11 Mechanical Design budynas_SM_ch11 - 47 F r A K...

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Chapter 11 295 11-11 The reliability of the individual bearings is R = 0 . 999 = 0 . 9995 From statics, R y O =− 163 . 4N, R z O = 107 N, R O = 195 N R y E =− 89 . 2N, R z E =− 174 . 4N, R E = 196 N x D = 60 000(1200)(60) 10 6 = 4320 C 10 = 0 . 196 ± 4340 0 . 02 + 4 . 439[ln(1 / 0 . 9995)] 1 / 1 . 483 ² 1 / 3 = 8 . 9kN A 02-25 mm deep-groove ball bearing has a basic load rating of 14.0 kN which is ample. An extra-light bearing could also be investigated. 11-12 Given: F rA = 560 lbf or 2.492 kN F rB = 1095 lbf or 4.873 kN Trial #1: Use K A = K B = 1 . 5 and from Table 11-6 choose an indirect mounting.
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Unformatted text preview: . 47 F r A K A < ? > . 47 F r B K B − ( − 1)(0) . 47(2 . 492) 1 . 5 < ? > . 47(4 . 873) 1 . 5 . 781 < 1 . 527 Therefore use the upper line of Table 11-6. F aA = F aB = . 47 F r B K B = 1 . 527 kN P A = . 4 F r A + K A F aA = . 4(2 . 492) + 1 . 5(1 . 527) = 3 . 29 kN P B = F r B = 4 . 873 kN 150 300 400 A O F z A F y A E R z E R y E F C C R z O R y O z x y...
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