Thread Mill Radial Depth of Cut: How to Optimize Radial Engagement in HRC65 Steel
Last month in Stuttgart, Germany, we troubleshot a severe rework issue on a precision mold insert. The part was made of 1.2379 (D2) tool steel, cryogenically hardened to 65 HRC. The print called for a blind M6×1 internal thread. The shop-floor team faced a brutal bottleneck: their ultra-fine-grain carbide threaded end mill snapped before finishing
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