In the pages
following are shown engravings and half-tones of tools,
machines, grinding fixtures, laps and lapping devices and
arrangements, and combination fixtures for presenting duplicate
work to grinding operations
from the simplest to the most intricate in modern use; and we
have endeavored to not only describe how to use them, but to
describe and illustrate how to design and construct them as
well, in a clear practical manner, so that all grades of
metal-working mechanics may be able to understand thoroughly how
to design, construct and use them for the economic production of
the marvelous variety of machine parts and tools required to-day.
Many of the tools and
devices described and illustrated in this volume we designed and
used ourselves; others were designed under our personal
supervision; while others have been selected from published
articles written for the technical press under our own name and
various pen names.
For many other descriptions
and illustrations we are indebted to the kind courtesy of the
editors of American Machinist, and Machinery, respectively, and
here extend our thanks and sense of deep obligation to these
journals for the privilege of using extracts and illustrations
of their articles.
For a large
number of practical "kinks" and "points" we acknowledge our
indebtedness to the numerous concerns, and to the fellow workers with whom we have
The sections on " Hardening and Tempering of
Tool Steel Parts of Delicate Structure, which Require to be
Ground and Lapped Afterwards," and "Carbon Percentages in
Hardened and Ground Steel Tools and Parts," are so near akin to
the general subject of this work, that they have been given a
place so that the mechanic interested in grinding and lapping
may become thoroughly familiar with this practice.
endeavored to keep all obsolete matter out of this treatise, and
to make every process, method, tool and device described
represent the very highest that has been attained in the
development and application of each type shown.
Joseph V. Woodworth