A certain application requires a ball bearing with the inner ring rotating, with a design life of 26 kh at a speed of 425 rev/min. The radial load is 2.5 kN and an application factor of 1.2 is appropriate. The reliability goal is 0.9. Find the multiple of rating life required, XD, and the catalog rating 10 with which to enter a bearing table. Choose a 02-series deep-groove ball bearing from Table 11-2 and estimate the reliability in use. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A certain application requires a ball bearing with the inner ring rotating, with a design life of 26 kh at a speed of 425
rev/min. The radial load is 2.5 kN and an application factor of 1.2 is appropriate. The reliability goal is 0.9. Find the
multiple of rating life required, XD, and the catalog rating C10 with which to enter a bearing table. Choose a 02-series
deep-groove ball bearing from Table 11-2 and estimate the reliability in use.
NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part.
For a C10 value of 30.7 kN, what is the reliability using the design factor, force, speed, and desired life from part a?
The reliability is 0.129
Transcribed Image Text:A certain application requires a ball bearing with the inner ring rotating, with a design life of 26 kh at a speed of 425 rev/min. The radial load is 2.5 kN and an application factor of 1.2 is appropriate. The reliability goal is 0.9. Find the multiple of rating life required, XD, and the catalog rating C10 with which to enter a bearing table. Choose a 02-series deep-groove ball bearing from Table 11-2 and estimate the reliability in use. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. For a C10 value of 30.7 kN, what is the reliability using the design factor, force, speed, and desired life from part a? The reliability is 0.129
Shoulder
Load Ratings, KN
Fillet
Diameter, mm
Deep Groove
Angular Contact
Bore,
OD,
Width,
Radius,
mm
mm
mm
mm
ds
dμ
C10
Co
C10
Со
10
30
9
0.6
12.5
27
5.07
2.24
4.94
2.12
12
32
10
0.6
14.5
28
6.89
3.10
7.02
3.05
15
35
11
0.6
17.5
31
7.80
3.55
8.06
3.65
17
40
12
0.6
19.5
34
9.56
4.50
9.95
4.75
20
47
14
1.0
25
41
12.7
6.20
13.3
6.55
25
52
15
1.0
30
47
14.0
6.95
14.8
7.65
30
62
16
1.0
35
55
19.5
10.0
20.3
11.0
35
72
17
1.0
41
65
25.5
13.7
27.0
15.0
40
80
18
1.0
46
72
30.7
16.6
31.9
18.6
45
85
19
1.0
52
77
33.2
18.6
35.8
21.2
50
90
20
1.0
56
82
35.1
19.6
37.7
22.8
55
100
21
1.5
63
90
43.6
25.0
46.2
28.5
60
110
22
1.5
70
99
47.5
28.0
55.9
35.5
65
120
23
1.5
74
109
55.9
34.0
63.7
41.5
70
125
24
1.5
79
114
61.8
37.5
68.9
45.5
75
130
25
1.5
86
119
66.3
40.5
71.5
49.0
80
140
26
2.0
93
127
70.2
45.0
80.6
55.0
85
150
28
2.0
99
136
83.2
53.0
90.4
63.0
90
160
30
2.0
104
146
95.6
62.0
106
73.5
95
170
32
2.0
110
156
108
69.5
121
85.0
Transcribed Image Text:Shoulder Load Ratings, KN Fillet Diameter, mm Deep Groove Angular Contact Bore, OD, Width, Radius, mm mm mm mm ds dμ C10 Co C10 Со 10 30 9 0.6 12.5 27 5.07 2.24 4.94 2.12 12 32 10 0.6 14.5 28 6.89 3.10 7.02 3.05 15 35 11 0.6 17.5 31 7.80 3.55 8.06 3.65 17 40 12 0.6 19.5 34 9.56 4.50 9.95 4.75 20 47 14 1.0 25 41 12.7 6.20 13.3 6.55 25 52 15 1.0 30 47 14.0 6.95 14.8 7.65 30 62 16 1.0 35 55 19.5 10.0 20.3 11.0 35 72 17 1.0 41 65 25.5 13.7 27.0 15.0 40 80 18 1.0 46 72 30.7 16.6 31.9 18.6 45 85 19 1.0 52 77 33.2 18.6 35.8 21.2 50 90 20 1.0 56 82 35.1 19.6 37.7 22.8 55 100 21 1.5 63 90 43.6 25.0 46.2 28.5 60 110 22 1.5 70 99 47.5 28.0 55.9 35.5 65 120 23 1.5 74 109 55.9 34.0 63.7 41.5 70 125 24 1.5 79 114 61.8 37.5 68.9 45.5 75 130 25 1.5 86 119 66.3 40.5 71.5 49.0 80 140 26 2.0 93 127 70.2 45.0 80.6 55.0 85 150 28 2.0 99 136 83.2 53.0 90.4 63.0 90 160 30 2.0 104 146 95.6 62.0 106 73.5 95 170 32 2.0 110 156 108 69.5 121 85.0
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