Copyright © 2012
by
The Goodheart-Willcox Company, Inc.
Previous editions copyright 2007, 2003, 2000, 1996, 1991, 1987, 1982, 1978, 1975, 1972
All rights reserved. No part of this work may be reproduced, stored, or transmitted in any form
or by any electronic or mechanical means, including information storage and retrieval systems,
without the prior written permission of The Goodheart-Willcox Company, Inc.
Manufactured in the United States of America.
Library of Congress Catalog Card Number 2010034176
ISBN 978-1-60525-405-0
2 3 4 5 6 7 8 9 – 12 – 16 15 14
The Goodheart-Willcox Company, Inc. Brand Disclaimer: Brand names, company names,
and illustrations for products and services included in this text are provided for educational
purposes only and do not represent or imply endorsement or recommendation by the author or
the publisher.
The Goodheart-Willcox Company, Inc. Safety Notice: The reader is expressly advised to
carefully read, understand, and apply all safety precautions and warnings described in this book
or that might also be indicated in undertaking the activities and exercises described herein to
minimize risk of personal injury or injury to others. Common sense and good judgment should
also be exercised and applied to help avoid all potential hazards. The reader should always
refer to the appropriate manufacturer’s technical information, directions, and recommendations;
then proceed with care to follow specific equipment operating instructions. The reader should
understand these notices and cautions are not exhaustive.
The publisher makes no warranty or representation whatsoever, either expressed or implied,
including but not limited to, equipment, procedures, and applications described or referred to
herein or their quality, performance, merchantability, or fitness for a particular purpose. The
publisher assumes no responsibility for any changes, errors, or omissions in this book. The
publisher specifically disclaims any liability whatsoever, including any direct, indirect, incidental,
consequential, special, or exemplary damages resulting, in whole or in part, from the reader’s
use or reliance upon the information, instructions, procedures, warnings, cautions, applications,
or other matter contained in this book. The publisher assumes no responsibility for the activities
of the reader.
2 Exploring Drafting
Library of Congress Cataloging-in-Publication Data
Walker, John R.
Exploring drafting / John R. Walker, Bernard D. Mathis.
p. cm.
Includes index.
ISBN 978-1-60525-405-0
1. Mechanical drawing. I. Mathis, Bernard D. II. Title.
T353.W22 2012
604.2--dc22
2010034176