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Core Hole Diameter

Created on · core-hole-diameter

Core Hole Diameter

Calculates the recommended core hole diameter for cut and formed metric threads.

Formulas

cutting tap: D ≈ d − P; forming tap: D ≈ d − 0,5 · P

Sources: ISO 68-1: metric basic profile; ISO 724: basic dimensions of metric threads.; https://guhring.com/media/tools/815.pdf

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