1_ch 11 Mechanical Design budynas_SM_ch11

# 1_ch 11 Mechanical Design budynas_SM_ch11 - 10 6 = 1440 The...

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Chapter 11 11-1 For the deep-groove 02-series ball bearing with R = 0.90, the design life x D , in multiples of rating life, is x D = 30 000(300)(60) 10 6 = 540 Ans. The design radial load F D is F D = 1 . 2(1 . 898) = 2 . 278 kN From Eq. (11-6), C 10 = 2 . 278 ± 540 0 . 02 + 4 . 439[ln(1 / 0 . 9)] 1 / 1 . 483 ² 1 / 3 = 18 . 59 kN Ans. Table 11-2: Choose a 02-30 mm with C 10 = 19 . 5 kN. Ans. Eq. (11-18): R = exp ³ ´ 540(2 . 278 / 19 . 5) 3 0 . 02 4 . 439 µ 1 . 483 = 0 . 919 Ans. 11-2 For the Angular-contact 02-series ball bearing as described, the rating life multiple is x D = 50 000(480)(60)
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Unformatted text preview: 10 6 = 1440 The design load is radial and equal to F D = 1 . 4(610) = 854 lbf = 3 . 80 kN Eq. (11-6): C 10 = 854 ± 1440 . 02 + 4 . 439[ln(1 / . 9)] 1 / 1 . 483 ² 1 / 3 = 9665 lbf = 43 . 0 kN Table 11-2: Select a 02-55 mm with C 10 = 46 . 2 kN. Ans. Using Eq. (11-18), R = exp ³ − ´ 1440(3 . 8 / 46 . 2) 3 − . 02 4 . 439 µ 1 . 483 ¶ = . 927 Ans....
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