{"product_id":"kennametal-4150271-drill-bit-letter-u-0-368-in-solid-carbide","title":"Kennametal 4150271 Drill Bit Letter U 0.368 in Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4150271 is a screw machine length (stub) solid carbide drill bit sized to Letter U (0.3680 inches) with a 140-degree split-point geometry. Coated with TiAlN at the tip for heat and wear resistance, it is built for high-productivity drilling in ferrous and non-ferrous materials where a shorter, stiffer tool body reduces deflection and improves hole accuracy. With a 3xD flute-to-diameter ratio and a tapered web configuration, the bit is designed for CNC machining centers, drill presses, and screw machine applications where repeatability and tight tolerances are required. Licensed machinists, tool-and-die technicians, and CNC operators are the primary users of this tooling.\u003c\/p\u003e\u003cp\u003eThis bit is suited for stub-length drilling operations in production machining environments where rigidity is more critical than depth of cut. The 0.3937-inch straight cylindrical shank seats securely in standard drill chucks and collet holders. Maximum drilling depth is 1.3780 inches (35.00 mm), making it appropriate for through-holes and blind holes in plate, block, and billet stock. It conforms to DIN 6537K specification, which governs solid carbide stub-length drills, aligning it with tooling programs that specify DIN-standard geometry.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter U sizing at 0.3680 inches diameter with a tolerance of -0.0006 to 0.0000 inches for consistent hole sizing\u003c\/li\u003e\n\u003cli\u003e140-degree standard point angle with tapered web for self-centering entry and reduced thrust force\u003c\/li\u003e\n\u003cli\u003eTiAlN tip coating improves wear resistance and thermal stability during high-speed cutting\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction provides rigidity and hardness superior to high-speed steel in abrasive materials\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute, 1.8504 inches (47.00 mm) flute length, supports chip evacuation in short-depth applications\u003c\/li\u003e\n\u003cli\u003eConforms to DIN 6537K specification for dimensional consistency across tooling setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and production drill bit for CNC machining centers, screw machines, and drill presses using standard straight-shank collet or chuck toolholding rated for 0.3937-inch shank diameter tooling.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed only after the machine spindle has been brought to a full stop and the machine is locked out or powered down per shop lockout\/tagout procedures. Seat the straight cylindrical shank fully in the collet or chuck before tightening to manufacturer-specified holding torque for the toolholder type in use. Inspect the cutting edges and coating for chips or damage before each use, as carbide tooling is brittle and should not be used if the edge is chipped. Disposal and handling of carbide tools should follow applicable shop safety protocols, as carbide dust and fragments are hazardous.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: U\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3680 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiAlN (Tip)\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: Regular Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.8504 inches (47.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.5039 inches (89.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3937 inches (10.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.5748 inches (40.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.3780 inches (35.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.0627 inches (1.59 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: -0.0006 to 0.0000 inches (-0.015 to 0.000 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Stub (Screw Machine Length)\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\u003eWeight\u003c\/strong\u003e: 0.02 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: 4150271\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51727210185010,"sku":"4150271","price":132.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5f03628a27ad306fd844286c426767f7.jpg?v=1788674761","url":"https:\/\/voomisupply.com\/products\/kennametal-4150271-drill-bit-letter-u-0-368-in-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}