machineshop technology

GENERAL MACHINIST
THEORY
VOCATIONAL EDUCATION
HIGHER SECONDARY - SECOND YEAR

A Publication under
Government of Tamilnadu
Distribution of Free Textbook Programme
( NOT FOR SALE )

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Untouchability is a crime
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TAMILNADU
TEXTBOOK CORPORATION
College Road, Chennai - 600 006.

©

Government of Tamilnadu
First Edition - 2011
Chairperson

Dr. R. RAJKUMAR,
Head of the Department ( Mechanical )
AMK Polytechnic College,
Sembarambakkam, Chennai - 602 103.

Authors

G. JAYAKUMAR JESUDOSS,
Vocational Teacher,
Dharmamurthi Rao Bahadur Calavala Cunnan Chetty’s
Hindu Higher Secondary School,
Thiruvallur - 602 001.

C. RAVIVARMAN

A. VELAYUTHAM

Vocational Teacher,
Govt. Boys Higher Secondary School,
Nattrampalli,
Vellore Dist - 635 852.

Vocational Teacher,
Govt. Higher Secondary School,
Nemili,
Vellore Dist - 631 051.

B. PRABHAKARAN

N. PALANIVELU

Vocational Teacher,
Govt. Boys Higher Secondary School,
Vandavasi,
Thiruvannamalai Dist-604 408.

Vocational Teacher,
Govt. Boys Higher Secondary School,
Arni,
Thiruvannamalai Dist - 632 301.

This book has been prepared by the Directorate of School Education on behalf of the
Government of Tamilnadu

This book has been printed on 60 GSM paper

Printed by Web Offset at :

INDEX
Sl. No.

Title

Page No.

1.

Lathe

1

2.

Drilling machine

43

3.

Shaping machine

70

4.

Grinding machine

94

5.

Milling machine

119

6.

Hydraulic equipments

148

7.

Electrical equipments

173

8.

Welding

181

9.

CNC Machines

201

10.

Machine tool maintenance

215

iii

1. LATHE
1.1 Introduction
Lathe is considered as one of the oldest machine tools and is widely used in industries.
It is called as mother of machine tools. It is said that the first screw cutting lathe was developed by an Englishman named Henry Maudslay in the year 1797. Modern high