Question

6. For the bearing with the largest radial load and without knowing the shaft diameter, what would be the catalog rating for a radially loaded ball bearing to withstand 1000 x 10e6 cycles with 90% reliability. The bearing manufacturer rates its bearing for a million cycles.

7. A 10 mm diameter steel shaft is subject to bending stresses only. The material has Sut = 1100 MPa and Sy = 950 MPa and a fine-ground surface finish.

1. Determine the factor of safety for a static internal moment of 300 in-lb.

2. Determine fatigue strength for 106 or more cycles, with oscillating internal moment from -300 to 300 in -lb.

3. Determine a factor of safety for infinite life for the same fatigue loading condition in 2

6. For the bearing with the largest radial load and without knowing the shaft diameter, what would be the catalog rating for a radially loaded ball bearing to withstand 1000 x 10 cycles with 90 % reliability. The bearing manufacturer rates its bearing for a million cycles. 7. A 10 mm diameter steel shaft is subject to bending stresses only. The material has Su= 1100 MPa and Sy and a fine-ground surface finish. 1. Determine the factor of safety for a static internal moment of 300 in-lb. 950 MPa Determine fatigue strength for 106 or more cycles, with oscillating internal moment from -300 to 300 in-lb. 2. Determine a factor of safety for infinite life for the same fatigue loading condition in 2 3.

Answer 1

Hello,

please find the answer below for question 7 all parts. Thank you
= C Sut 950 Mfa 11o0 MPa IT EHL S 0t bnd 1 l669ue 300nt6 C 300 10-2 3.45 K9 3.45x9.21 NM 2hrem = 2 ma 12 36 MPa as b 2X1+2 3C pus Faut gue gthcngth O0 u xb G 990 MPa 3.995 (t0s0 621Mfa 4%oסינ

9.35 : lo, Ce)t0 21) 9 : logo 2.35 2- 19 hor l0 ycles Fahgue G2 MPa t39 : @