Page 1919 - Master Catalog 2017, Inch

Technical Information
Illustrations of Tap Terms

pitch
tap crest
basic crest

angle of thread
flank
min tap
major basic height
diameter of thread

basic
major
max tap diameter base of thread
major diameter basic root basic minor diameter
basic pitch diameter

concentric margin
cutting edge relief to
cutting edge
no relief eccentric relief

heel
cutting
face

Concentric Eccentric Relief Con-Eccentric Relief

Technical Information
tap major diameter

basic minor diameter
Negative Hook 0º Hook Positive Hook

Negative Rake Radial Rake Positive Rake

Reprinted with permission from United States Cutting Tool Institute (USCTI). Published by Kennametal Inc. © 2014. All rights reserved.

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