1. A shaft 80 mm diameter transmits power at maximum shear stress of 63 MPa. Find the length of a 20mm wide key required to mount a pulley on the shaft so that the stress in the key does not exceed 42MPa.[Ans. 152 mm]2. A shaft 30 mm diameter is transmitting power at a maximum shear stress of 80 MPa. If a pulley isconnected to the shaft by means of a key, find the dimensions of the key so that the stress in the key isnot to exceed 50 MPa and length of the key is 4 times the width.[Ans. / 126 mm]3. A steel shaft has a diameter of 25 mm. The shaft rotates at a speed of 600 r.p.m. and transmits 30 kWthrough a gear. The tensile and yield strength of the material of shaft are 650 MPa and 353 MParespectively. Taking a factor of safety 3, select a suitable key for the gear. Assume that the key andshaft are made of the same material.[Ans./= 102 mm]

as per guideline i have to solve only first question

1. A shaft 80 mm diameter transmits power at maximum shear stress of 63 MPa. Find the length of a 20 mm wide key required to mount a pulley on the shaft so that the stress in the key does not exceed 42 MPa

1. A shaft 80 mm diameter transmits power at maximum shear stress of 63 MPa. Find the length of a 20 mm wide key required to mount a pulley on the shaft so that the stress in the key does not exceed 42 MPa

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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