Loading...37 – Dividing
التقسيم
من سلسلة
Workshop Practice Series
Harold Hall
CONTENTS
Chapter 1
An Introduction to Dividing
Chapter 2
The Machinery. Discusses the major items of equipment, Dividing heads, Rotary tables
Indexers, etc.
Chapter 3
The Methods. Explains how to use the equipment in Chapter Two to achieve the required
result. Also explains though how even complex dividing can be achieved using no other
equipment than that normally foundin the workshop, typically the lathe and milling machine.
Chapter 4
The Mathematics. Whilst the tables provided with a dividing head, or those published in
this book, will provide the information for most applications, occasionally recourse to
calculation may be necessary. This chapter explains the process, fortunately, the
mathematics is not complex.
Chapter 5
Holes on a Pitch Circle Diameter (PCD) Explains the mathematics for placing holes on a
PCD using a milling machine’s X and Y table movements and their calibrated leadscrew
dials. Also shows how using a computer spread sheet program can be used to limit
considerably the work involved.
Chapter 6
Shop Made Simple Dividing Devices. Some simple devices that will enable dividing
activities without the need for a dividing head.
Chapter 7
Shop Made Basic Dividing Head. A simple dividing head that is easy to construct, and for
most, will be adequate for all the dividing tasks required in the workshop.
Chapter 8
Shop Made Full Function Dividing+lead. A dividing head that is more adaptable than a
commercially available semi-universal head and providing a wider range of divisions. It is
not over complex to make and would be a very satisfying project to complete.
71Chapter 9 82
Shop Made Lining Tool. Engraving a dial with its different length lines is made easy with
this lining tool. It is also an interesting project to construct.
Chapter 10
Prime Numbers. Prime numbers and their uses explained and listed.
Chapter 11 98
Tables. Tables for a wide range of dividing head ratios and division plate hole numbers
are included. These should make the need for calculation a rare occurrence.
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