Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Question
Calculate the SKF rating life at 95% reliability for the following thrust ball bearing and conditions.
Fa: 5.17 kN
n: 1497 rpm
Bearing 51110
Clearance Normal
aSKF: 1
Give the answer in hours.
Transcribed Image Text:Basic load ratings
Fatique
load limit
Principal dimensions
Minimum
load factor
Speed ratings
Reference
speed
Mass
Designation
dynamic
static
Limiting
speed
d
D
H
C
Co
Pu
A
5.1
kN
kN
r/min
kg
mm
5 000
3 800
7 000
5 300
• 51108
• 51208
40
60
68
13
19
25,5
44,2
63
2,32
3,6
0,02
0,058
0,12
0,28
96,5
78
90
26
36
61,8
95,6
4 300
3 400
• 51308
• 51408
122
4,5
6,8
0,077
0,26
3 000
0,53
1,1
183
2 400
0,025
0,038
6 300
5 000
• 51109
• 51209
45
65
73
14
20
26,5
39
69,5
86,5
2,55
3,2
4 500
3 600
0,14
0,3
85
100
28
39
76,1
124
153
240
5,6
9
0,12
0,37
2 800
2 200
4 000
3 000
0,66
1,4
• 51309
• 51409
0,029
0,069
• 51110
• 51210
50
70
78
14
27
75
116
2,8
4,3
4 300
3 400
6 300
4 500
0,16
0,37
22
49,4
95
110
31
43
81,9
159
170
340
6,3
12,5
0,19
0,6
2 600
2 000
3 600
2 800
0,94
2
• 51310
• 51410
30,2
58,5
81,5
134
0.039
0,11
• 51111
• 51211
55
78
16
25
3
3 800
2 800
5 300
4 000
0,23
0,59
90
4,9
105
120
35
48
• 51311
• 51411
101
224
400
8,3
14,6
0,26
0,79
2 200
1 800
3 200
1,3
2,55
195
2 400
0,077
0,12
5 000
3 800
• 51112
• 51212
60
85
95
17
26
41,6
59,2
122
140
4,55
5,1
3 600
0,27
0,65
2 800
110
130
35
51
101
199
2 200
1 600
3 000
2 200
• 51312
• 51412 M
224
8,3
16
0,26
0,96
1,35
3,1
430
3 400
2 600
• 51113
• 51213
65
90
100
18
27
37,7
60,5
108
150
4
0,06
0,14
4 800
3 600
0,33
0,72
5,5
115
140
36
56
106
216
240
490
8,8
18
0,3
1,2
2 000
1 500
3 000
2 200
1,5
4
• 51313
• 51413 M
0,074
0,16
3 400
2 600
• 51114
• 51214
70
95
105
18
27
40,3
62,4
120
160
4,4
5,85
4 500
3 600
0,35
0,79
125
150
40
60
135
234
320
550
11,8
19,3
0,53
1,6
1900
1 400
2 600
2 000
• 51314
• 51414 M
0,11
0,17
3 200
2 400
4 300
3 400
• 51115
• 51215
75
100
19
27
44,2
63,7
134
170
4,9
6,2
0,4
0,83
110
135
160
1700
1300
• 51315
• 51415 M
44
163
251
390
610
14
0,79
1,9
2 400
1 800
2,6
6,75
65
20,8
• Popular item
474
SKF.
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