{"product_id":"kennametal-6388685-carbide-replaceable-tip-drill-21-5mm","title":"Kennametal 6388685 Carbide Replaceable Tip Drill 21.5mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 6388685 is a carbide replaceable tip drill from the KTFSS series, designed for precision hole-making in steel and cast iron. The drill tip carries part number KTFSS21500HPGM and is manufactured from fine-grain solid carbide with a PVD-applied AlTiN coating. It features a 21.5mm cutting diameter, a 2-flute helical configuration with a 2-margin geometry, and an HPG insert geometry optimized for chip control. The KCP15A manufacturer grade makes this tip well-suited for demanding ferrous machining applications. Installation and tip changes are handled by a clamp-style insert holding method. Licensed machinists and CNC tooling technicians are the primary users of this product.\u003c\/p\u003e\u003cp\u003eThis replaceable tip drill is intended for use in production machining environments where consistent hole quality in steel and cast iron is required. Its design supports drilling into inclined exit surfaces and stacked plates, making it applicable across a range of fixturing and workholding setups. The standard point type and regular spiral configuration suit general-purpose drilling cycles on CNC machining centers and drill presses. It does not include coolant-through capability, so external coolant delivery should be planned accordingly when machining heat-sensitive materials or at higher feed rates.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFine-grain solid carbide tip with KCP15A grade for wear resistance in steel and cast iron\u003c\/li\u003e\n\u003cli\u003eAlTiN coating applied via PVD process for thermal and oxidation resistance\u003c\/li\u003e\n\u003cli\u003eHPG insert geometry with 2-flute, 2-margin configuration for chip management\u003c\/li\u003e\n\u003cli\u003eSupports drilling into inclined exit surfaces and stacked plate setups\u003c\/li\u003e\n\u003cli\u003eClamp-style insert retention for repeatable tip indexing\u003c\/li\u003e\n\u003cli\u003eNo coolant-through design  -  compatible with external coolant delivery\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a replaceable tip for KTFSS-series drill bodies accepting the Z insert seat size. Tip ISO number is KTFSS21500HPGM. Primary workpiece materials are steel (ISO material code P) and cast iron (ISO material code K).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eReplaceable carbide drill tips of this type are installed and serviced by qualified CNC machining technicians. Power down and lock out the machine spindle before seating or removing the tip. Use the appropriate torque tool as specified by the drill body manufacturer  -  do not over-tighten or substitute fasteners. Inspect the insert seat for damage or debris before each tip installation to ensure proper seating and runout.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 21.5mm (0.8465 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Fine Grain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade\u003c\/strong\u003e: KCP15A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: KTFSS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO Number\u003c\/strong\u003e: KTFSS21500HPGM\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: HPG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Seat Size\u003c\/strong\u003e: Z\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 180 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 11.0mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctional Length\u003c\/strong\u003e: 0.4233 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\/Projection\u003c\/strong\u003e: 0.6028 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 15.0mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material Code\u003c\/strong\u003e: P, K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications\u003c\/strong\u003e: Drilling, Inclined Exit Drilling, Stacked Plate Drilling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02866 pounds\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: 6388685\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51741482516786,"sku":"6388685","price":246.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6347f7cd35a09a3bd394746d06feef03_c8699f0d-01a4-43d1-ab71-ceeb87c080e4.jpg?v=1788831755","url":"https:\/\/voomisupply.com\/products\/kennametal-6388685-carbide-replaceable-tip-drill-21-5mm","provider":"Voomi Supply","version":"1.0","type":"link"}