Question

A Read aloud Draw Erase Figure P14.28 shows two bearings supporting a 1000-rpm shaft and gear. The bearing on the left carries a 5-kN radial load and 1-KN thrust load. The loading is borderline between "light" and “moderate" impact. The required life is 5000 hours with only 2% probability of failure. Select a 200 series radial-contact ball bearing for the left bearing. Gear Shaft Bearing bo 10:22 PM 3 O Type here to search

Answer 1

Solutions From the problem we can take 1 data the given N = 1000 rpm fra SKN Fa = 1. KN For light moderate impact (ka)= 105 In = 5000h reability = 1-0.02 = 0.98 * with 978 percent. reliability (Kr) =0:33 → life in million revolutions are (= lnx nx 60 La 5000 x 1000 x 60 = 3X10 Prer.

> The life corresponding to rated capacity @ (LR) = 90 x 70 % Fa fr Ś 50.2 < 0.35 → for a radial bearing Fez Er 5 KN → for a radial bearing, the required value of rated capacity for the application Corega - Fekax Caminados Creq = Dons •Creg = 15.00 KN 5X1.5X 3x108 0.33X90X206 radial bearing a 200 capacity with a rated of 16 HN would be sufficient for left bearing with bore 65mm