{"product_id":"guhring-9055200120000-cobalt-stub-drill-bit-12mm","title":"Guhring 9055200120000 Cobalt Stub Drill Bit 12mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9055200120000 is a cobalt stub-length drill bit engineered for high-performance drilling in demanding shop and production environments. Built to DIN 1897 standards, this Series 5520 bit features a 12.00 mm (0.4724 inches) diameter, a 118-degree four-facet split point, and a web-thinned tapered web for reduced thrust and clean entry. The two-flute spiral configuration with a regular helix promotes efficient chip evacuation. At 102.00 mm overall length with a 51.00 mm flute length, the stub format provides added rigidity, making it well suited for machinists and toolmakers working in tight-clearance setups or on drill press and CNC operations requiring precise hole location.\u003c\/p\u003e\u003cp\u003eThis drill bit is designed for use in metalworking applications where a shorter, stiffer tool reduces deflection and improves hole accuracy. The cobalt construction gives it the heat resistance needed for harder alloys, and the primary listed workpiece material is aluminum, though the cobalt substrate handles a range of materials encountered in general machining. The straight-cylindrical shank fits standard drill chucks and collet holders, making it compatible with common production machinery. It ships individually and is packaged as a single unit.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDIN 1897 stub length for increased rigidity and reduced deflection\u003c\/li\u003e\n\u003cli\u003eCobalt tool material for elevated heat resistance during high-speed or hard-material drilling\u003c\/li\u003e\n\u003cli\u003e118-degree four-facet split point reduces walking and lowers entry thrust\u003c\/li\u003e\n\u003cli\u003eWeb-thinned tapered web improves cutting efficiency at the tip\u003c\/li\u003e\n\u003cli\u003eTwo-flute regular spiral design promotes chip clearing throughout the cut\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank fits standard drill chucks and collet holders without modification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a DIN 1897-standard stub-length drill bit suitable for use in drill presses, machining centers, and CNC equipment fitted with standard drill chucks or collet systems accepting a 12.00 mm straight-cylindrical shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or toolroom technicians familiar with rotating cutting tool safety. Secure the shank fully in the chuck or collet and verify runout before drilling. Ensure the workpiece is firmly fixtured before engaging the spindle. Follow applicable shop safety standards and machine manufacturer guidelines for spindle speed and feed rate selection.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 12.00 mm (0.4724 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 102.00 mm (approximately 4.02 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 51.00 mm (approximately 2.01 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 12.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 33.00 mm (1.2990 inches)\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: Four Facet Split\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Stub\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: +0.000 to -0.027 mm\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: Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 5520\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: DIN 1897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.157 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: 9055200120000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51750618038578,"sku":"9055200120000","price":45.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/905a5006a23292a1fffffa23d3b1b98c_ec0a517b-9dcb-403c-b47e-b31e5afd389f.jpg?v=1788917439","url":"https:\/\/voomisupply.com\/products\/guhring-9055200120000-cobalt-stub-drill-bit-12mm","provider":"Voomi Supply","version":"1.0","type":"link"}