{"product_id":"kennametal-6370991-carbide-replaceable-tip-drill-7-8-in","title":"Kennametal 6370991 Carbide Replaceable Tip Drill 7\/8 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 6370991 is a solid carbide replaceable tip drill designed for precision hole-making in demanding machining applications. Built to the KTFST series standard, this drill tip carries the KCMS15 manufacturer grade and features an AlTiN PVD coating for extended tool life in abrasive and high-temperature cutting conditions. The cutting diameter is 0.875 inches with a 140-degree included drill point angle and a helical flute design with 2 flutes and 2 margins. Through-coolant capability is integrated directly into the tip, supporting high-feed drilling operations where heat management is critical. This tip is installed by machinists and tooling technicians in CNC machining centers.\u003c\/p\u003e\u003cp\u003eThe KTFST08750HPL tip is engineered primarily for stainless steel (ISO material group M) and is well-suited for challenging drilling scenarios including inclined exit surfaces and stacked plate configurations. The HPL insert geometry and fine-grain carbide substrate support stable cutting action and edge integrity under interrupted or varying load conditions. The ZA insert seat size governs body compatibility. This tip is a single-piece consumable replacement component used in KTFS-series drill bodies.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction with KCMS15 fine-grain grade for wear resistance in stainless steel\u003c\/li\u003e\n\u003cli\u003eAlTiN PVD coating for high-temperature and oxidation resistance during prolonged cuts\u003c\/li\u003e\n\u003cli\u003e140-degree drill point angle with HPL insert geometry for controlled chip formation\u003c\/li\u003e\n\u003cli\u003eThrough-coolant design supports chip evacuation and thermal management at the cutting zone\u003c\/li\u003e\n\u003cli\u003e2-flute, 2-margin helical configuration compatible with inclined exit and stacked-plate drilling\u003c\/li\u003e\n\u003cli\u003eReplaceable tip format reduces tooling cost by preserving the drill body between tip changes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replaceable tip for KTFS-series drill bodies accepting the ZA insert seat size. Compatible drill bodies must match the 0.875-inch nominal cutting diameter and ZA seat designation. Consult the KTFST series pairing guide for confirmed body part numbers before ordering.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis replaceable tip is installed and torqued by a qualified machinist or toolroom technician following the drill body manufacturer torque procedure. Ensure the spindle and machine are fully stopped and locked out before tip removal or installation. Inspect the insert seat on the drill body for chips, debris, or wear before seating the new tip. Do not use damaged or worn drill bodies, as improper seating will compromise runout and tip retention.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Helical, Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCMS15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Fine Grain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: AlTiN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating Process\u003c\/strong\u003e: PVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Geometry\u003c\/strong\u003e: HPL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Seat Size\u003c\/strong\u003e: ZA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KTFST\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Number\u003c\/strong\u003e: KTFST08750HPL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Stainless Steel (ISO Code M)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctional Length\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\/Projection\u003c\/strong\u003e: 0.6186 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 11.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02668 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 6370991\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51739602354482,"sku":"6370991","price":257.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5316861e4fa58b630d05fcee417e25f4_fb4eaf2f-5af6-46d5-b4b7-43d7a126679b.jpg?v=1788816814","url":"https:\/\/voomisupply.com\/products\/kennametal-6370991-carbide-replaceable-tip-drill-7-8-in","provider":"Voomi Supply","version":"1.0","type":"link"}