Just part c A shaft is supported by two ball bearings at the ends, as shown in Figure Q3.13DGearR1R2Figure Q3a) Two loads on the shaft are FA = 1 kN and FB = 1.5 kN. The length of the shaft is a = 500mm. The locations of the loads are b = 200 mm and c = 220 mm. Determine the reactionforces R1 and R2 at the bearings.b) The minimum required bearing life is 5000 hours. The shaft rotates at a constant speed of1000 rpm. Determine the desired bearing life in revolutions.c) The two ball bearings should be identical. Determine the minimum value for the basicdynamic load rating C with 90% reliability.For your information: A sample page (Table Q3) from the SKF catalogue shows the use ofthe basic dynamic load rating C when selecting bearings.FAFBBCN DD₁Principal dimensionsdDBmm1417cont14141419172077DzBasic load ratingsdynamic staticFatigueload limitSpeed ratingsReferencespeedLimitingCspeed¹CoP₁kNkNr/min14,36,550,27534 00022 00014,36,550,27511 00014,36,550,27534 00017 00014.36,550,27534 00017 00013,56.550.27511 00022,910,80.45528 00018 0004,032,320,10413 0004,032,320,10445 00022 0004,032,320,10445 00028 0006,373,650.15612 0006,373.650,15643 00020 0006,373.650,15643 00026 0007,284,050,17338 000240009,9550,21238 00024 0009,9550,21211 0009,9538 00019 0009,950,2120,2120,21238 00019 0009.3611 00013,56.550.2832 00020 00013,56.550,2810 00013.56.550.2832 00017 00013,56.550,2832 00017 00015,67,650.32532 00020 00012,76.550,2810 00015,930 00015 0007,87,87,80,3350,3350,33516,816,830 00019 000-9 50016,80,33530 00015 0007,8918.20,3830 00019 00015,97,80,3359 50030.7150,6424 00015 000227,650.3259.00014147,650,32530 00019 0001618.69,30,3928 00018 000SKF Explorer bearingPopular item11 For bearings with only one shield or one non-contact seal [2, RZ) the limiting speeds of the apen bearings are valid27047GCC GG 2 666 90G NOG GGG GGG CCC CCC ~ 28*99981212 1226 L L418 15 155 5 51 19 ku6474747476232323242424247474747474752525212525252725050561291414141521d di1414555Masskg0.110,120.120,120,160,270.0180.0180.0180,0380,0380,0370,0510,0670,0670,0690,0710,0860.110.110,110.110,0980.130.150,140.150,150,140,210,410,120.120.18AAP222RSL2RZNa2RS12RSHDesignationsBearingopen or cappedon both sides63036303-2RSH6303-2RSL6303-2Z62303-2RS1640361804-2RS161804-2RZ6180461904-2RS161904-2RZ61904160046004► 6004-2RSH6004-2RSL6004-2Z63004-2RS1-6204▸ 6204-2RSH6204-2RSL6204-226204 ETN962204-2RS16304-2RSL6304-2RSH6304-2Z6304 ETN962304-2RS1640462/22-2RS162/2263/22F-6304capped on onesidel)6303-RSH6303-RSL6303-ZITE6004-RSH6004-RSL6004-Z6204-RSH6204-RSL6204-Z6304-RSL6304-RSH6304-ZSKF.

Answered: Image /qna-images/answer/83ce5177-3233-426a-8e9c-4005d2f98107.jpg

A shaft is supported by two ball bearings at the ends, as shown in Figure Q3. C Gear R1 R2 Figure Q3 a) Two loads on the shaft are FA = 1 kN and FB = 1.5 kN. The length of the shaft is a = 500 mm. The locations of the loads are b = 200 mm and c = 220 mm. Determine the reaction forces R1 and R2 at the bearings. b) The minimum required bearing life is 5000 hours. The shaft rotates at a constant speed of 1000 rpm. Determine the desired bearing life in revolutions. c) The two ball bearings should be identical. Determine the minimum value for the basic dynamic load rating C with 90% reliability. For your information: A sample page (Table Q3) from the SKF catalogue shows the use of the basic dynamic load rating C when selecting bearings. Pulley FA (2) FB H N 4

A shaft is supported by two ball bearings at the ends, as shown in Figure Q3. C Gear R1 R2 Figure Q3 a) Two loads on the shaft are FA = 1 kN and FB = 1.5 kN. The length of the shaft is a = 500 mm. The locations of the loads are b = 200 mm and c = 220 mm. Determine the reaction forces R1 and R2 at the bearings. b) The minimum required bearing life is 5000 hours. The shaft rotates at a constant speed of 1000 rpm. Determine the desired bearing life in revolutions. c) The two ball bearings should be identical. Determine the minimum value for the basic dynamic load rating C with 90% reliability. For your information: A sample page (Table Q3) from the SKF catalogue shows the use of the basic dynamic load rating C when selecting bearings. Pulley FA (2) FB H N 4

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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Concept explainers

Free Body Diagram

The system of forces acting on a body tends to either rotate it or make the body undergo motion. In general, when an external agent exerts a force on a body, the body undergoes translational motion and rotational motion. The body has six degrees of freedom under the influence of that force. Here, three degrees of freedom are from the translational motion while the other three are from the rotation motion. However, sometimes the bodies are not allowed to undergo any motion and are fixed, under such conditions the body is said to be constrained.

Question

Just part c

A shaft is supported by two ball bearings at the ends, as shown in Figure Q3.
13
D
Gear
R1
R2
Figure Q3
a) Two loads on the shaft are FA = 1 kN and FB = 1.5 kN. The length of the shaft is a = 500
mm. The locations of the loads are b = 200 mm and c = 220 mm. Determine the reaction
forces R1 and R2 at the bearings.
b) The minimum required bearing life is 5000 hours. The shaft rotates at a constant speed of
1000 rpm. Determine the desired bearing life in revolutions.
c) The two ball bearings should be identical. Determine the minimum value for the basic
dynamic load rating C with 90% reliability.
For your information: A sample page (Table Q3) from the SKF catalogue shows the use of
the basic dynamic load rating C when selecting bearings.
FA
FB
B
C
N

DD₁
Principal dimensions
d
D
B
mm
14
17
cont
14
14
14
19
17
20
7
7
Dz
Basic load ratings
dynamic static
Fatigue
load limit
Speed ratings
Reference
speed
Limiting
C
speed¹
Co
P₁
kN
kN
r/min
14,3
6,55
0,275
34 000
22 000
14,3
6,55
0,275
11 000
14,3
6,55
0,275
34 000
17 000
14.3
6,55
0,275
34 000
17 000
13,5
6.55
0.275
11 000
22,9
10,8
0.455
28 000
18 000
4,03
2,32
0,104
13 000
4,03
2,32
0,104
45 000
22 000
4,03
2,32
0,104
45 000
28 000
6,37
3,65
0.156
12 000
6,37
3.65
0,156
43 000
20 000
6,37
3.65
0,156
43 000
26 000
7,28
4,05
0,173
38 000
24000
9,95
5
0,212
38 000
24 000
9,95
5
0,212
11 000
9,95
38 000
19 000
9,95
0,212
0,212
0,212
38 000
19 000
9.36
11 000
13,5
6.55
0.28
32 000
20 000
13,5
6.55
0,28
10 000
13.5
6.55
0.28
32 000
17 000
13,5
6.55
0,28
32 000
17 000
15,6
7,65
0.325
32 000
20 000
12,7
6.55
0,28
10 000
15,9
30 000
15 000
7,8
7,8
7,8
0,335
0,335
0,335
16,8
16,8
30 000
19 000
-
9 500
16,8
0,335
30 000
15 000
7,8
9
18.2
0,38
30 000
19 000
15,9
7,8
0,335
9 500
30.7
15
0,64
24 000
15 000
22
7,65
0.325
9.000
14
14
7,65
0,325
30 000
19 000
16
18.6
9,3
0,39
28 000
18 000
SKF Explorer bearing
Popular item
11 For bearings with only one shield or one non-contact seal [2, RZ) the limiting speeds of the apen bearings are valid
270
47
GCC GG 2 666 90G NOG GGG GGG CCC CCC ~ 28*
99981212 1226 L L418 15 155 5 51 19 ku6
47
47
47
47
62
32
32
32
42
42
42
47
47
47
47
47
47
52
52
52
12
52
52
52
72
50
50
56
129
14
14
14
15
21
d di
14
14
555
Mass
kg
0.11
0,12
0.12
0,12
0,16
0,27
0.018
0.018
0.018
0,038
0,038
0,037
0,051
0,067
0,067
0,069
0,071
0,086
0.11
0.11
0,11
0.11
0,098
0.13
0.15
0,14
0.15
0,15
0,14
0,21
0,41
0,12
0.12
0.18
AAP
22
2RSL
2RZ
N
a
2RS1
2RSH
Designations
Bearing
open or capped
on both sides
6303
6303-2RSH
6303-2RSL
6303-2Z
62303-2RS1
6403
61804-2RS1
61804-2RZ
61804
61904-2RS1
61904-2RZ
61904
16004
6004
► 6004-2RSH
6004-2RSL
6004-2Z
63004-2RS1
-6204
▸ 6204-2RSH
6204-2RSL
6204-22
6204 ETN9
62204-2RS1
6304-2RSL
6304-2RSH
6304-2Z
6304 ETN9
62304-2RS1
6404
62/22-2RS1
62/22
63/22
F
-6304
capped on one
sidel)
6303-RSH
6303-RSL
6303-Z
ITE
6004-RSH
6004-RSL
6004-Z
6204-RSH
6204-RSL
6204-Z
6304-RSL
6304-RSH
6304-Z
SKF.

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