{"product_id":"guhring-9055240065300-cobalt-stub-drill-bit-letter-f","title":"Guhring 9055240065300 Cobalt Stub Drill Bit Letter F","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9055240065300 is a cobalt screw machine length (stub) drill bit sized to Letter F, with a decimal diameter of 0.2570 inches (6.53 mm). Built to DIN 1897 specification from M35 cobalt steel, it features a 118-degree, 4-facet point with web thinning for reduced thrust and cleaner entry. The straw finish signals the cobalt heat treatment that extends tool life in demanding materials. Two regular spiral flutes evacuate chips efficiently. This bit is used by machinists, maintenance technicians, and metalworking tradespeople who need a short, rigid drill for precise holes in tight setups.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for drilling steel, stainless steel, cast iron, aluminum, and other non-ferrous materials in production and maintenance environments. The stub length keeps the tool rigid, reducing deflection when drilling without a drill press guide or in confined spaces. Its straight shank fits standard drill chucks and collet holders. The 3xD flute-to-diameter ratio and tapered web configuration support consistent performance across repetitive operations in both manual and CNC-assisted setups.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM35 cobalt steel construction for heat resistance and extended tool life in hard and abrasive materials\u003c\/li\u003e\n\u003cli\u003e118-degree, 4-facet point with web thinning for reduced entry force and accurate self-starting\u003c\/li\u003e\n\u003cli\u003eStub length overall length of 2.7559 inches for increased rigidity and reduced deflection\u003c\/li\u003e\n\u003cli\u003eRegular spiral flutes with tapered web for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eStraight shank at 0.2571 inches diameter for compatibility with standard drill chucks and collets\u003c\/li\u003e\n\u003cli\u003eManufactured to DIN 1897 specification for consistent dimensional tolerances\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement stub drill bit for use in standard drill chucks and collet holders accepting a 0.2571-inch straight shank, suitable for applications specifying a Letter F drill in Series 5524.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or maintenance technicians familiar with metalworking drill tooling. Ensure the drill press, mill, or handheld drill is powered off and secured before inserting or removing the bit from the chuck or collet. Verify shank seating and chuck tightness before operation. Always wear appropriate PPE including eye protection when drilling metal.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter (Decimal Inch)\u003c\/strong\u003e: 0.2570 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter (mm)\u003c\/strong\u003e: 6.53 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (M35)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: 4 Facet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw\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: 31.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (Decimal Inch)\u003c\/strong\u003e: 2.7559 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (mm)\u003c\/strong\u003e: 70.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter (Decimal Inch)\u003c\/strong\u003e: 0.2571 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter (mm)\u003c\/strong\u003e: 6.53 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length (Decimal Inch)\u003c\/strong\u003e: 1.5354 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length (mm)\u003c\/strong\u003e: 39.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth (Decimal Inch)\u003c\/strong\u003e: 0.8350 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth (mm)\u003c\/strong\u003e: 21.21 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0.000 to -0.022 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered with web thinning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 5524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: DIN 1897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Aluminum and Non-Ferrous\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.029 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: GUHRING\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 9055240065300\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51732779663666,"sku":"9055240065300","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a9ebd41c8e5e7fab915c964afa30941b.jpg?v=1788746716","url":"https:\/\/voomisupply.com\/products\/guhring-9055240065300-cobalt-stub-drill-bit-letter-f","provider":"Voomi Supply","version":"1.0","type":"link"}