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Technical Information Tap Terminology Tap Definitions LAND CUTTING FACE CORE FLUTE Thread Relief Types CONCENTRIC THREADS (No radial relief) Section A-A RADIAL RELIEF CONCENTRIC LAND RADIAL RELIEF CON-ECCENTRIC THREADS (Relieved to a land) ECCENTRIC THREADS (Relieved to cutting edge) Cutting Faces LAND TANGENTIAL HOOK HEEL NEGATIVE RAKE ANGLE NEGATIVE RAKE CHORDAL HOOK POSITIVE RAKE ANGLE RADIAL RAKE POSITIVE RAKE HOOK 437 www.sutton.com.au
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