{"product_id":"kennametal-4150252-5-16-inch-carbide-stub-drill-bit","title":"Kennametal 4150252 5\/16 Inch Carbide Stub Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 4150252 is a screw machine (stub) length solid carbide drill bit designed for high-performance drilling in metalworking and machining applications. Built to DIN 6537K standards, it features a 140-degree point angle for aggressive cutting and reduced thrust, a multilayer TiAlN coating for heat and wear resistance, and a right-hand spiral flute geometry. The overall length is 3.11 inches with a flute length of 1.61 inches, making it well-suited for rigid, close-tolerance work in CNC and conventional machine tool setups. It weighs 0.1 pounds and is sold individually.\u003c\/p\u003e\u003cp\u003eThis drill bit is used in production machining environments where stub-length rigidity is needed to hold tight tolerances in ferrous metals, stainless steels, cast iron, and similar materials. The 3xD flute-to-diameter ratio and tapered web configuration support chip evacuation in short-depth holes. Maximum drilling depth is 1.14 inches. Typical applications include automotive, aerospace, and general metal fabrication shops running multi-spindle or CNC drilling operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for high hardness and wear resistance in demanding materials\u003c\/li\u003e\n\u003cli\u003eTiAlN coating applied at tip for elevated heat resistance and extended tool life\u003c\/li\u003e\n\u003cli\u003e140-degree point angle reduces thrust and improves hole entry accuracy\u003c\/li\u003e\n\u003cli\u003eStub length design increases rigidity and reduces deflection in short-depth holes\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank compatible with standard drill chucks and collets\u003c\/li\u003e\n\u003cli\u003eDIN 6537K specification for consistent dimensional compliance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a stub-length replacement drill bit for CNC machining centers, drill presses, and multi-spindle machines accepting a straight cylindrical shank with a 0.315-inch shank diameter. Compatible with Series B041A-CPG tooling configurations.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power locked out per applicable safety procedures. Verify chuck or collet runout before seating the shank to avoid premature edge wear. Carbide tooling is brittle and should not be dropped or used to pry. Confirm drilling depth does not exceed the maximum rated depth of 1.14 inches for this stub-length geometry.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 5\/16 inch (0.3125 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.11 inches (79.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.61 inches (41.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.14 inches (29.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.315 inches (8.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.42 inches (36.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length\u003c\/strong\u003e: 0.053 inches (1.34 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\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN (Tip)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: -0.0006 to 0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: B041A-CPG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6537K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: 4150252\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51730771116338,"sku":"4150252","price":117.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2e7bed550bcd53da732f14fe06dce049.jpg?v=1788722597","url":"https:\/\/voomisupply.com\/products\/kennametal-4150252-5-16-inch-carbide-stub-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}