{"product_id":"guhring-9055240125000-cobalt-stub-drill-bit-0-4921-in","title":"Guhring 9055240125000 Cobalt Stub Drill Bit 0.4921 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9055240125000 is a cobalt stub-length (screw machine length) drill bit sized at 0.4921 inches (12.50 mm) diameter, built to DIN 1897 standards. Constructed from M35 cobalt high-speed steel, it delivers elevated heat and wear resistance compared to standard HSS tooling. The four-facet split point geometry reduces walking on entry and lowers thrust force, while the web-thinned, tapered-web construction improves chip evacuation. A bright uncoated finish keeps the surface neutral for use across a broad range of workpiece materials. Machinists, tool-and-die shops, and production drilling operations are the primary users of this bit.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for stub-length drilling applications where a shorter flute and compact overall length provide added rigidity in high-feed or interrupted-cut conditions. Its primary workpiece material designation is aluminum, though the cobalt M35 grade also handles other non-ferrous and moderate-hardness ferrous materials well. The regular spiral flute and 3xD flute-to-diameter ratio support efficient chip clearing at typical production drilling depths. The maximum drilling depth is 1.2700 inches (32.25 mm). This bit fits standard drill chucks accepting a 12.50 mm straight-cylindrical shank.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM35 cobalt construction for increased heat and abrasion resistance versus standard HSS\u003c\/li\u003e\n\u003cli\u003eFour-facet split point with web thinning reduces entry thrust and improves self-centering\u003c\/li\u003e\n\u003cli\u003eStub (screw machine) length provides greater rigidity in short-reach drilling setups\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, regular spiral flute for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish compatible with cutting fluids and lubricants without coating interaction\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 or production drill for use in standard drill chucks and CNC machining centers accepting a 12.50 mm straight-cylindrical shank, within the GUHRING Series 5524 drill bit family conforming to DIN 1897.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of this drill bit should be performed by machinists or qualified tooling technicians familiar with rotating cutting tool safety. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify chuck or collet runout is within acceptable limits before commencing drilling, as excessive runout accelerates tool wear and degrades hole tolerance. Always apply appropriate cutting fluid or coolant for the workpiece material being drilled.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.4921 inches (12.50 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.02 inches (102.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.01 inches (51.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 1.2700 inches (32.25 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 12.50 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\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute-to-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\u003eTool Material\u003c\/strong\u003e: Cobalt M35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Aluminum\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\u003eDrill Bit Size Range\u003c\/strong\u003e: 0.4500 to 0.5000 inches (11.00 to 13.50 mm)\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\u003eWeight\u003c\/strong\u003e: 0.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 4.02 x 4.02 x 0.51 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 9055240125000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51730666946866,"sku":"9055240125000","price":43.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/811371580b76207012e788127ac70812.jpg?v=1788721141","url":"https:\/\/voomisupply.com\/products\/guhring-9055240125000-cobalt-stub-drill-bit-0-4921-in","provider":"Voomi Supply","version":"1.0","type":"link"}