{"product_id":"guhring-9055200099200-cobalt-stub-drill-bit-25-64-in","title":"Guhring 9055200099200 Cobalt Stub Drill Bit 25\/64 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9055200099200 is a cobalt stub-length (screw machine length) drill bit designed for high-speed metal drilling in demanding shop and field applications. Built to DIN 1897 standards, this 25\/64 inch (0.3906 inch) diameter bit features a 118-degree four facet split point with web thinning for reduced thrust and cleaner entry. The straight-cylindrical shank measures 9.92 mm in diameter, and the overall length comes in at 89.00 mm (approximately 3.50 inches). Two spiral flutes with a regular helix evacuate chips efficiently, making this bit well-suited for production drilling and tight-tolerance work. It is installed and used by machinists, maintenance technicians, and trade professionals requiring consistent, repeatable hole quality in metal workpieces.\u003c\/p\u003e\n\u003cp\u003eThis stub-length drill bit is optimized for use on aluminum as its primary workpiece material, though the cobalt construction also handles harder alloys under appropriate feed and speed conditions. The shortened flute length of 43.00 mm and a maximum drilling depth of 1.107 inches (28.12 mm) make it ideal for rigid setups on drill presses, CNC machining centers, and hand-held power drills where stub-length rigidity reduces deflection. The 3xD flute-to-diameter ratio and tapered web configuration contribute to stability during entry and throughout the cut. This bit ships individually and is sold as a single unit.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt tool material for elevated heat resistance during metal drilling\u003c\/li\u003e\n  \u003cli\u003e118-degree four facet split point with web thinning reduces drill thrust and improves self-centering\u003c\/li\u003e\n  \u003cli\u003eDIN 1897 stub-length geometry provides increased rigidity and reduced deflection versus jobber-length bits\u003c\/li\u003e\n  \u003cli\u003eRegular spiral, two-flute design promotes efficient chip evacuation from the cut zone\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank compatible with standard drill chucks and collet holders\u003c\/li\u003e\n  \u003cli\u003eDiameter tolerance held to +0.000 \/ -0.022 mm for consistent hole sizing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard production drill bit conforming to DIN 1897 for stub-length cobalt drill applications. No specific machine or system compatibility data was provided in the product input.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists, tool-and-die professionals, or qualified maintenance technicians. Always ensure the drilling machine is powered down and the spindle is fully stopped before inserting or removing the bit from a chuck or collet. Verify shank seating and chuck tightness before operation, and select feed rates and spindle speeds appropriate for the workpiece material per the manufacturer or shop standard reference tables. Do not exceed the maximum drilling depth of 1.107 inches without retracting to clear chips.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Inch)\u003c\/strong\u003e: 25\/64\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3906 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\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\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 43.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 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: 9.92 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.107 inches (28.12 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 3xD\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 Bit Diameter Tolerance\u003c\/strong\u003e: +0.000 to -0.022 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Aluminum\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: 5520\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: DIN 1897\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.095 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 9055200099200\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51753692397874,"sku":"9055200099200","price":43.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/905a5006a23292a1fffffa23d3b1b98c_5d5e3f89-5227-46ab-8a90-203a19e570c1.jpg?v=1788939568","url":"https:\/\/voomisupply.com\/products\/guhring-9055200099200-cobalt-stub-drill-bit-25-64-in","provider":"Voomi Supply","version":"1.0","type":"link"}