A certain application requires a ball bearing with the inner ring rotating, with a design life of LD = 15 kh at a speed of nD = 480 rev/min. The radial load is Fr = 1.4 kN, the axial load Fa = 0.4 kN, and an application factor of af = 1.2 is appropriate. The reliability goal, R = 0.99. a) Determine the multiple of rating life required, xD, and the catalog rating C10FR, where FR is the calculated bearing load in [kN] with which we enter a bearing table. Specify a 02-series angular contact ball bearing from Table 11–2, b) Estimate the reliability (R) and multiple of rating-life (XD) in use.
A certain application requires a ball bearing with the inner ring rotating, with a design life of LD = 15 kh at a speed of nD = 480 rev/min. The radial load is Fr = 1.4 kN, the axial load Fa = 0.4 kN, and an application factor of af = 1.2 is appropriate. The reliability goal, R = 0.99. a) Determine the multiple of rating life required, xD, and the catalog rating C10FR, where FR is the calculated bearing load in [kN] with which we enter a bearing table. Specify a 02-series angular contact ball bearing from Table 11–2, b) Estimate the reliability (R) and multiple of rating-life (XD) in use.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
A certain application requires a ball bearing with the inner ring rotating, with a design life of LD = 15 kh at a speed of nD = 480 rev/min. The radial load is Fr = 1.4 kN, the axial load Fa = 0.4 kN, and an application factor of af = 1.2 is appropriate. The reliability goal, R = 0.99.
- a) Determine the multiple of rating life required, xD, and the catalog rating C10FR, where FR is the calculated bearing load in [kN] with which we enter a bearing table.
Specify a 02-series angular contact ball bearing from Table 11–2,
- b) Estimate the reliability (R) and multiple of rating-life (XD) in use.
![Fillet
Shoulder
Load Ratings, kN
Bore,
OD,
Width, Radius,
Diameter, mm
Deep Groove
Angular Contact
ds
di
C10
Co
C10
Co
mm
mm
mm
mm
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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F05c99523-229c-479b-a926-1e7893368698%2Fcbcbb6d7-8cde-4452-b8c3-5e18535ea1f5%2Fs4r8zp_processed.png&w=3840&q=75)
Transcribed Image Text:Fillet
Shoulder
Load Ratings, kN
Bore,
OD,
Width, Radius,
Diameter, mm
Deep Groove
Angular Contact
ds
di
C10
Co
C10
Co
mm
mm
mm
mm
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
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