The second shaft on a parallel-shaft 25-hp foundry crane speed reducer contains a helical gear with a pitch diameter of 8.08 in. Helical gears transmit components of force in the tangential, radial, and axial directions. The components of the gear force transmitted to the second shaft are shown in Fig. (8) at point A. The bearing reactions at C and D, assuming simple- supports, are also shown. A ball bearing is to be selected for location C to 262 accept the thrust, and a cylindrical roller bearing is to be utilized at location D. The life goal of the speed reducer is 10 kh, with a reliability factor for the ensemble of all four bearings (both shafts) to equal 1 (90% reliability) with light to moderate impact. (a) Select the roller bearing for location D. (b) Select the ball bearing (angular contact) for location C, assuming the inner ring rotates. 356.6 344 297.5 106.6 4.04 in 344 250 Fig.(8)

The second shaft on a parallel-shaft 25-hp foundry crane speed reducer contains a helical gear with a pitch diameter of 8.08 in. Helical gears transmit components of force in the tangential, radial, and axial directions. The components of the gear force transmitted to the second shaft are shown in Fig. (8) at point A. The bearing reactions at C and D, assuming simple- supports, are also shown. A ball bearing is to be selected for location C to 262 accept the thrust, and a cylindrical roller bearing is to be utilized at location D. The life goal of the speed reducer is 10 kh, with a reliability factor for the ensemble of all four bearings (both shafts) to equal 1 (90% reliability) with light to moderate impact. (a) Select the roller bearing for location D. (b) Select the ball bearing (angular contact) for location C, assuming the inner ring rotates. 356.6 344 297.5 106.6 4.04 in 344 250 Fig.(8)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Problem 1.1MA

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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

Ex:
The second shaft on a parallel-shaft 25-hp foundry crane speed reducer
contains a helical gear with a pitch diameter of 8.08 in. Helical gears
transmit components of force in the tangential, radial, and axial directions.
The components of the gear force transmitted to the second shaft are shown
in Fig. (8) at point A. The bearing reactions at C and D, assuming simple-
supports, are also shown. A ball bearing is to be selected for location C to
262
accept the thrust, and a cylindrical roller bearing is to be utilized at location
D. The life goal of the speed reducer is 10 kh, with a reliability factor for
the ensemble of all four bearings (both shafts) to equal1 (90% reliability)
with light to moderate impact.
(a) Select the roller bearing for location D.
(b) Select the ball bearing (angular contact) for location C, assuming the
inner ring rotates.
356.6
144
297.5
3 in
2915
4.04 in
106.6
595
144
250
Fig.(8)
Table(1) Bearing Characteristics That May Influence the Selection of Bearing Type

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