{"product_id":"kennametal-4150233-letter-f-solid-carbide-stub-drill-bit","title":"Kennametal 4150233 Letter F Solid Carbide Stub Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4150233 is a screw machine length (stub) solid carbide drill bit in Letter F size (0.2570 inches), designed for high-precision drilling in metalworking and machining applications. Built to DIN 6537K standards, it features a 140-degree split point and a multilayer TiAlN coating with a TiN tip for extended tool life and resistance to heat buildup at the cutting edge. The 3.1102-inch overall length and straight cylindrical shank make it suitable for use in CNC machining centers, drill presses, and screw machine setups where rigidity and hole accuracy are critical. Installation is typically performed by machinists and tool-and-die professionals.\u003c\/p\u003e\u003cp\u003eThis stub-length drill bit is engineered for close-tolerance drilling in ferrous and non-ferrous metals, including steel, cast iron, and aluminum alloys. The shortened flute length improves rigidity and reduces deflection, making it well suited for production drilling where repeatability and hole quality matter. The Series B041A-CPG designation identifies it within the KENNAMETAL solid carbide drill program. It is used in precision manufacturing, job shop machining, and high-volume drilling operations where carbide tooling is preferred over high-speed steel.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter F size (0.2570 inches) with a diameter tolerance of -0.0006 to 0.0000 inches for close-fit hole making\u003c\/li\u003e\n\u003cli\u003e140-degree standard point angle for self-centering and reduced thrust in metal drilling\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction for superior hardness and wear resistance compared to HSS\u003c\/li\u003e\n\u003cli\u003eTiAlN multilayer coating with TiN tip extends cutting life and reduces friction\u003c\/li\u003e\n\u003cli\u003eStub (screw machine) length at 3.1102 inches overall provides increased rigidity and reduced deflection\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting, regular spiral flute with tapered web — DIN 6537K specification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style solid carbide stub drill compatible with standard straight-shank drill chucks and collet systems accepting an 8.00 mm (0.3150 inch) shank diameter. Fits within the KENNAMETAL Series B041A-CPG drill program for Letter F diameter applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed by machinists using a standard drill chuck or ER collet sized to the 0.3150-inch shank diameter. Ensure the machine spindle is fully powered down and locked out before tool changes. Solid carbide tooling is brittle — avoid side loading, interrupted cuts without proper feed rate adjustments, or dropping the bit on hard surfaces. Verify runout with a dial indicator before production drilling to protect both the tool and the workpiece.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: Letter F (0.2570 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\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN Multilayer with TiN Tip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.1102 inches (79.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.3386 inches (34.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.9449 inches (24.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3150 inches (8.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.4173 inches (36.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.0432 inches (1.10 mm)\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: Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Stub (Screw Machine)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: -0.0006 to 0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.2500 to 0.3000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6537K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: B041A-CPG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.09 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: 4150233\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51750570197298,"sku":"4150233","price":121.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d57ce786326ec86daf7fc7538cc4cc14.jpg?v=1788916815","url":"https:\/\/voomisupply.com\/products\/kennametal-4150233-letter-f-solid-carbide-stub-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}