A machine operated for 8 hrs a day under light impact is fitted with a shaft with bearingsfitted at A and B. The shaft requires a design life of 25 000 hours at a speed of 475 rpm. Theload on the shaft is indicated in the figure. The reliability goal for the shaft is 95%. Determinethe following:Multiple of rating life required (Xp)b.а.Catalogue rating (C10)Specify a suitable 02-series deep groove ball bearingd.c.The actual shaft reliabilityThe maximum speed that the bearing should be applied at to ensure a life of40 000 hrs at the same reliability.е.3000 N5000 N500 mm450 mm600 mmAВ

n=475rpmL10h=25000hrsRelaibility goal =95% To-Find:- 1 Multiple of rating life required2 Catalogue…

Answered: machine operated for e ted at A and B.…

Engineering

Mechanical Engineering

machine operated for e ted at A and B. The sha ad on the shaft is indica e following:

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

Metrology of Screw Threads

Screw threads are a series of ridges having the profile of a helix. This helix profile runs continuously along the length of a uniform solid or a hollow bar of a circular cross-section at periodic intervals. These helix ridges are also formed over a conical bar. These continuous helical ridges are termed threads.

Question

A machine operated for 8 hrs a day under light impact is fitted with a shaft with bearings
fitted at A and B. The shaft requires a design life of 25 000 hours at a speed of 475 rpm. The
load on the shaft is indicated in the figure. The reliability goal for the shaft is 95%. Determine
the following:
Multiple of rating life required (Xp)
b.
а.
Catalogue rating (C10)
Specify a suitable 02-series deep groove ball bearing
d.
c.
The actual shaft reliability
The maximum speed that the bearing should be applied at to ensure a life of
40 000 hrs at the same reliability.
е.
3000 N
5000 N
500 mm
450 mm
600 mm
A
В

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