Hertel WPMT-32.52LF HP520B Trigon 3/8" IC Carbide Boring Insert (10 Pcs)

The Hertel WPMT-32.52LF HP520B is a solid carbide Trigon (W-shape, 80° included angle) boring insert in grade HP520B, a TiN (Titanium Nitride) coated carbide designed for steel and general-purpose turning and boring applications. Decoded per ISO/ANSI designation: W = 80° trigon shape, P = 11° relief angle (clearance), M = medium tolerance class, T = with chipbreaker hole and chipbreaker geometry (LF = light finishing chipbreaker), size 32 = 3/8" inscribed circle, thickness 52 = 5/64" (approximately 3.97 mm), nose radius LF suffix designating 1/32" corner radius. The HP520B grade's TiN coating provides a characteristic gold color, increased surface hardness, and reduced friction for improved tool life in boring and light-to-medium finishing cuts on steel, cast iron, and ductile materials. This listing contains 10 new, unused inserts packaged in a standard Hertel orange tray (lot number N1128), manufactured in the USA as indicated on the package label. Compatible with WPMT-style boring bar toolholders accepting 3/8" IC W-shape inserts with a 11° relief; the LF chipbreaker geometry is optimized for low cutting forces and fine-finish boring passes.

Product Specifications