{"product_id":"kennametal-1157964-indexable-drill-insert-dftld-kc720","title":"Kennametal 1157964 Indexable Drill Insert Dftld KC720","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 1157964 is a solid carbide indexable drill insert designed for use in indexable drilling systems. It carries the KC720 manufacturer grade with a PVD-applied TiN coating, delivering wear resistance and edge integrity in demanding drilling applications. The insert features an 84-degree trigon shape with an 8 mm (0.315 inches) inscribed circle, a corner radius of 0.80 mm (0.031 inches), and a thickness of 0.1476 inches. The LD chipbreaker geometry supports efficient chip evacuation during through-hole and blind-hole drilling. This insert is installed by machinists and tooling professionals working with indexable drill bodies in metalworking environments.\u003c\/p\u003e\u003cp\u003eThis insert is suited for metalcutting operations requiring a replaceable, indexable carbide cutting edge. The DFT insert style and LD chipbreaker make it appropriate for general-purpose drilling in materials covered by material grades C1 through C5, which include cast iron, carbon steel, alloy steel, and similar ferrous materials. It fits indexable drill bodies that accept the 05T308 insert size with an 8-degree relief angle. The 3.4 mm mounting hole accommodates standard insert-retention screws used in compatible drill bodies.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eKC720 grade solid carbide with PVD TiN coating for extended tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003e84-degree trigon shape with LD chipbreaker for controlled chip formation\u003c\/li\u003e\n\u003cli\u003e8 mm inscribed circle and 05T308 insert size for precise fitment in compatible drill bodies\u003c\/li\u003e\n\u003cli\u003e0.80 mm corner radius reduces edge chipping at entry and exit\u003c\/li\u003e\n\u003cli\u003eRelief angle of 8 degrees provides clearance and reduces flank wear\u003c\/li\u003e\n\u003cli\u003eInsert length of 0.2083 inches (5.29 mm) for consistent seating depth\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in indexable drill bodies that accept the DFT insert style in size 05T308 with an 8 mm inscribed circle and 3.4 mm hole diameter. Consult your drill body documentation to confirm insert style and seat geometry before ordering.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInsert replacement should be performed with the drill body fully removed from the machine spindle and all power isolated. Use the correct Torx or hex key specified by the drill body manufacturer when tightening the retention screw — do not overtighten, as carbide inserts are brittle and will crack under excessive clamping force. Inspect the insert pocket for damage, chips, or debris before seating the new insert. This work is typically performed by a machinist or toolroom technician familiar with indexable tooling systems.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Style\u003c\/strong\u003e: DFT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KC720\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape\u003c\/strong\u003e: Trigon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Angle\u003c\/strong\u003e: 84 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: LD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed Circle\u003c\/strong\u003e: 8.00 mm (0.315 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.80 mm (0.031 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.1476 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 0.2083 inches (5.29 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Size\u003c\/strong\u003e: 05T308\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Angle\u003c\/strong\u003e: 8 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Diameter\u003c\/strong\u003e: 3.4 mm (0.1339 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C1, C5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0051 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1157964\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51737726124338,"sku":"1157964","price":200.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2819e665c6a4a49da8a9b6995937b258.jpg?v=1788792846","url":"https:\/\/voomisupply.com\/products\/kennametal-1157964-indexable-drill-insert-dftld-kc720","provider":"Voomi Supply","version":"1.0","type":"link"}