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Completely updated and revised to reflect the changes and additions made to the Handbook , this Guide will enable users to maximize the enormous practical value available from Machinery's Handbook .
Features -Illustrates through hundreds of examples, solutions, and questions how to take full advantage of the Handbook to solve the types of problems typically encountered in drafting rooms, machine shops and on the factory floor. -Allows you to quickly become more thoroughly familiar with the vast range of contents found in the Handbook . -By practicing the many practical techniques explained in this Guide, you will be able to obtain the solution or information needed to resolve on-the-job problems.
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Guide to Machinery's Handbook 27th Edition
SECTION 1 DIMENSIONS AND AREAS OF CIRCLES HANDBOOK Pages 66 and 76 Circumferences of circles are used in calculating speeds of rotating machine parts, including drills, reamers, milling cutters, grinding wheels, gears, and pulleys. These speeds are variously referred to as surface speed, circumferential speed, and peripheral speed; meaning for each, the distance that a point on the surface or circumference would travel in one minute. This distance usually is expressed as feet per minute. Circumferences are also required in calculating the circular pitch of gears, laying out involute curves, finding the lengths of arcs, and in solving many geometrical problems. Letters from the Greek alphabet frequently are used to designate angles, and the Greek letter π (pi) always is used to indicate the ratio between the circumference and the diameter of a circle: of circle π = 3.14159265… = circumference ------------------------------------------------------diameter of circle For most practical purposes the value of π = 3.1416 may be used. Example 1:Find the circumference and area of a circle whose diameter is 8 in