b'Stability is paramount.the coating. with solid carbide. Hobbs cites advances in multi-Hobbs said successful drilling ofToday, he said, inserts are in- purpose tooling.heat-resistant alloys calls for the cor- creasingly favored because, thanksTools that can perform more rect speed and higher feed forces. to improved coatings and geome- than a single function, he said, In the automotive industry, hetries, they perform extremely well insuch as creating the pilot hole while said, ISO P (steels), ISO K (cast andhard or abrasive materials. then drilling to spec, chamfering ductile irons) and ISO N (aluminum) are used extensively. These materi-Newals can range from short-chippingT-A Pro to long-chipping materials with a variety of compositions that re-quire a vast range of cutting edges and coatings. This makes indexableStainless Steel (M) Geometrydrilling solutions very popular.0.437" - 1.882" (11.10 mm - 47.80 mm)Other ChallengesNew alloys and increasingly com-plex part requirements, especially involving deep-hole drilling, have resulted in demand for new tooling materials and techniques.Carbide substrates have been vastly improved, and coated car-bide with post-coat treatment is the tooling of choice for deep-hole drilling in the 1 mm (0.04") to 20 mm (0.79") range, Pilger said. Beyond these diameters, we typically go to other tool designs, including mod-ular replaceable tip, indexable in-sert drills and spade drills. For larg-er-diameter holes, a steel-bodiedThe T-A Pro stainless steel (M) geometry holder with a carbide tip is effectiveinsert with AM460 coating is optimized for because the steel body is not brittleimproved chip formation in stainless steels and inclined to break. and heat resistant super alloy materials.Ruegsegger said in the past, deep-hole drilling always was done BOOTH #W-431436Stop by our booth & see the M geometry in action!about the author Frank Burke is co-owner of Burke & Towner Ltd., a strategicBORING REAMING BURNISHING THREADING SPECIALSmarketing andDRILLINGcommunicationsCall us today and put the M geometry to the test.agency in Reeds-ville, Wisconsin. Contact him330.343.4283at 920-443-3008 or [email protected]. www.alliedmachine.comctemag.com/cteguide.com21Holemaking.indd 21 8/16/22 11:49 AM'