rent types of machine tools, the
principal purpose being to explain the use of the machine and the
practical problems connected with its operation, rather than the
constructional details. No attempt has been made to describe every
machine or tool which might properly be included, but rather to deal
with the more important and useful operations, especially those which
illustrate general principles.

Readers of mechanical literature are familiar with MACHINERY'S 25-cent
Reference Books, of which one hundred and twenty-five different titles
have been published during the past six years. Many subjects, however,
cannot be adequately covered in all their phases in books of this size,
and in response to a demand for more comprehensive and detailed
treatments on the more important mechanical subjects, it has been deemed
advisable to bring out a number of larger volumes, of which this is one.
This work includes much of the material published in MACHINERY'S
Reference Books Nos. 91, 92 and 95, together with a great amount of
additional information on modern boring and turning methods.

It is a pleasure to acknowledge our indebtedness to the manufacturers
who generously supplied illustrations and data, including many
interesting operations from actual practice. Much valuable information
was also obtained from MACHINERY.

F. D. J.

NEW YORK, _May, 1914_.

CONTENTS

PAGES

CHAPTER I

THE ENGINE LATHE--TURNING AND BORING OPERATIONS

General Description of an Engine Lathe--Example of Cylindrical
Turning--Facing the Ends Square with a Side-tool--Turning
Tool--Turning Work Cylindrical--Roughing and Finishing
Cuts--Filing and Finishing--Aligning Centers for Cylindrical
Turning--Application of Drivers or Dogs--Lathe Arbors or
Mandrels--Different Types of Lathe Arbors--Mandrel or Arbor
Press--Steadyrest for Supporting Flexible Parts--Application of
Steadyrest when Boring--The Follow-rest--Centering Parts to be
Turned--Centering Machine--Different Forms of Centers--Precaution
When Centering Tool Steel--Facing the Ends of Centered
Stock--Truing Lathe Centers--Universal, Independent and
Combination Chucks--Application of Chucks--Example of
Boring--Measuring Bored Holes--Setting Work in the
Chuck--Inaccuracy from Pressure of Chuck Jaws--Drilling and
Reaming--Holding Work on Faceplate--Application of Angle-plate to
Face