b'In all cases, a protected edge is required for stability.Making the Grade edges make the cutting geome- forces and allowing a weaker ma-tries robust. chine tool to perform heavier-duty Wavy cutting edges and highercuts for the same horsepower.rakes, he said. Both of these func- rake angles make the same geom- When it comes to carbide in-tions are complemented by PVDetries shear the material better,sert designation, Dillaman said the grades. Garud said, thus reducing cutting80-degree insert, CNMG, is the In addition, Garud said HU5 ismost common, followed by the tri-a single-sided, heavy-duty rough- gon style, WNMG.ing geometry that also has a sharp,contributorsThese geometries offer the capa-positive rake angle. bilities of a larger depth of cut while This makes it a low cutting pres- Ceratizit USA Inc. still providing relief along the face sure geometry ideal for both stain- 800-783-2280 and turned diameters when machin-less steels and steels, he said. www.ceratizit.com ing to square shoulders, he said.Garud said another HU geometryWhether for automotive, aero-thats effective is the HU7, which hasGreenleaf Corp. space, railroad, mold and die or a a varying thickness of the protective814-763-2915 host of other applications, heavy chamfer to not only reinforce thewww.greenleafcorporation. rough turning of steel will continue to comcutting edge but help control chipsbe commonly performed and man-and reduce cutting forces. Walter USA LLC ufacturers with properly designed In general, he noted that protec- 800-945-5554 carbide inserts in their toolrooms will tive chamfers to reinforce cuttingwww.walter-tools.com continue to reap the rewards.CTEWere Celebrating 60 Years!Scientific Cutting ToolsThread Mills Port & Cavity Single Point Specialty IndexableAn actual person! Call for live technical assistance during business hours! Ship 2 Day Air8,000+ items, with many stocked and ready to ship. $15Free online thread mill code generator for easy, accurate output.SCT FLAT RATE A Global Name1.805.584.9495 www.sct-usa.comBooth 5320 in Cutting Tools 1.800.383.2244 [email protected] 2023Turning.indd 38 3/16/23 1:46 PM'