Specify the bearings required,

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Problem 3:
The figure shown is a geared countershaft with an overhanging pinion at C. Select an angular-
contact ball bearing from Tables below for mounting at O and a straight roller bearing for mount-
ing at B. The force on gear A is FA = 600 lbf, and the shaft is to run at a speed of 480 rev/min.
Solution of the statics problem gives force of bearings against the shaft at O as
Ro = -387j + 467k lbf, and at B as RB = 316j – 1615k lbf. Specify the bearings required, using
an application factor of 1.4, a desired life of 50 000 h, and a combined reliability goal of 0.90.
Given: -
%ך
C10 = F
1.483
1
0.02 +4.439| In
R,
a=3 for ball bearing and 10/3 for roller bearings.
20.
Fc
Gear 3
24 dia.
Gear 4
FA
10 dia.
20°
(in inches)
Transcribed Image Text:Problem 3: The figure shown is a geared countershaft with an overhanging pinion at C. Select an angular- contact ball bearing from Tables below for mounting at O and a straight roller bearing for mount- ing at B. The force on gear A is FA = 600 lbf, and the shaft is to run at a speed of 480 rev/min. Solution of the statics problem gives force of bearings against the shaft at O as Ro = -387j + 467k lbf, and at B as RB = 316j – 1615k lbf. Specify the bearings required, using an application factor of 1.4, a desired life of 50 000 h, and a combined reliability goal of 0.90. Given: - %ך C10 = F 1.483 1 0.02 +4.439| In R, a=3 for ball bearing and 10/3 for roller bearings. 20. Fc Gear 3 24 dia. Gear 4 FA 10 dia. 20° (in inches)
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