Choose the correct answer and give complete solution A hole of 20 mm diameter is to be drilled in a steel block of 40 mm thickness. The drilling isperformed at rotational speed of 400 rpm and feed rate of 0.1 mm/rev. The required approachand over run of the drill together is equal to the radius of drill. The drilling time (in minute) is(A) 1.00(B) 1.25(C) 1.50(D) 1.75

Given, Diameter,d= 20 mmThickness,t= 40 mm N= 400 rpmFeed rate,f= 0.1 mm/revDetermine the drilling…

Answered: The drilling time (in minute) is

Engineering

Mechanical Engineering

The drilling time (in minute) is

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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Choose the correct answer and give complete solution

A hole of 20 mm diameter is to be drilled in a steel block of 40 mm thickness. The drilling is
performed at rotational speed of 400 rpm and feed rate of 0.1 mm/rev. The required approach
and over run of the drill together is equal to the radius of drill. The drilling time (in minute) is
(A) 1.00
(B) 1.25
(C) 1.50
(D) 1.75

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