{"product_id":"guhring-9055200070000-cobalt-stub-drill-bit-0-2756-in","title":"Guhring 9055200070000 Cobalt Stub Drill Bit 0.2756 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9055200070000 is a cobalt stub-length drill bit built for demanding metal-cutting applications where rigidity and heat resistance matter. Ground to a 118-degree four-facet split point with web thinning, this bit starts on center without a pilot and reduces thrust force through the cut. At 7.00 mm (0.2756 inches) in diameter with a straight-cylindrical shank of the same diameter, it seats cleanly in standard drill chucks and collets. The two-spiral flutes run a 3xD ratio, supporting a maximum drilling depth of 0.925 inches (23.50 mm). Manufactured to DIN 1897 specification, the bit carries a cobalt tool material construction that maintains hardness at elevated cutting temperatures. HVAC, plumbing, and general metalworking mechanics reach for this geometry when short, stiff reach is more important than depth.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for drilling aluminum as its primary workpiece material, though the cobalt construction and four-facet split-point geometry also perform in a range of non-ferrous and ferrous metals encountered in trade fabrication and field work. The stub (screw-machine) length body reduces deflection in tight clearance situations, making it a practical choice for panel drilling, fixture work, and structural steel applications where a jobber-length bit would flex or chatter. Right-hand cut, regular spiral flute configuration handles chip evacuation efficiently at standard feed and speed rates.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt tool material retains hardness under high-heat cutting conditions\u003c\/li\u003e\n  \u003cli\u003e118-degree four-facet split point with web thinning for self-centering entry and reduced thrust\u003c\/li\u003e\n  \u003cli\u003eStub length body minimizes deflection and improves rigidity in tight spaces\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank at 7.00 mm fits standard chucks and collets without adapters\u003c\/li\u003e\n  \u003cli\u003eDIN 1897 specification ensures consistent dimensional tolerances across the series\u003c\/li\u003e\n  \u003cli\u003eTapered web configuration with web thinning supports clean chip formation and flute evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a DIN 1897 stub-length drill bit in Series 5520, sized for use in any standard drill chuck or collet accepting a 7.00 mm straight-cylindrical shank. Fits the 0.2500 to 0.3000 inch (6.50 to 8.00 mm) drill diameter range.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eSecure the shank fully in a chuck or collet before operation and verify concentricity to avoid premature edge wear. Power down and de-energize any machine spindle before bit changes. Follow applicable shop safety standards and machine manufacturer guidelines for feed rate and RPM when drilling cobalt bits into ferrous materials. Coolant-through is not supported on this bit; use external coolant or cutting fluid as appropriate for the workpiece material.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.2756 inches (7.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.913 inches (74.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.339 inches (34.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 0.925 inches (23.50 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 7.00 mm straight-cylindrical\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\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Coated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\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 Length Type\u003c\/strong\u003e: Stub\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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\u003eDiameter Tolerance\u003c\/strong\u003e: +0.000 to -0.022 mm\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: 0.04 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: 9055200070000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51737720127794,"sku":"9055200070000","price":24.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/905a5006a23292a1fffffa23d3b1b98c_6112876e-83f6-4732-b182-c0c88287e9b3.jpg?v=1788792751","url":"https:\/\/voomisupply.com\/products\/guhring-9055200070000-cobalt-stub-drill-bit-0-2756-in","provider":"Voomi Supply","version":"1.0","type":"link"}