{"product_id":"guhring-9003290040000-cobalt-stub-drill-bit-4mm","title":"Guhring 9003290040000 Cobalt Stub Drill Bit 4mm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9003290040000 is a cobalt (M35 grade) screw machine length drill bit designed for demanding drilling applications in hard and abrasive materials. Built to DIN 1897 standards, this stub-length bit features a 4.00 mm diameter, a 130-degree split point with web thinning, and an oxide finish. The right-hand spiral flute geometry and tapered web configuration deliver efficient chip evacuation and consistent hole quality. Licensed tradespeople and machinists working with titanium alloys and similar tough metals rely on this type of bit for its thermal resistance and edge retention under high-feed conditions.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for precision drilling in metalworking environments including aerospace, industrial maintenance, and fabrication shops. The stub length format — with a 22.00 mm flute length and 55.00 mm overall length — provides added rigidity compared to jobber-length bits, reducing deflection in short-depth applications. The straight-cylindrical shank is compatible with standard drill chucks and collets. Primary workpiece material is titanium alloy, though the cobalt composition also handles hardened steel and stainless steel in typical trade scenarios.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt M35 material grade for superior heat and wear resistance in hard metals\u003c\/li\u003e\n  \u003cli\u003e130-degree point angle with web thinning for reduced thrust and cleaner entry\u003c\/li\u003e\n  \u003cli\u003eDIN 1897 stub length for increased rigidity and reduced deflection\u003c\/li\u003e\n  \u003cli\u003eOxide surface finish for added lubricity and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eTapered web configuration with regular spiral flute for efficient chip removal\u003c\/li\u003e\n  \u003cli\u003eStraight-cylindrical shank fits standard drill chucks and collets without adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-fit option for applications requiring a DIN 1897 stub-length drill bit with a 4.00 mm straight-cylindrical shank. Compatible with standard drill chucks and collets accepting a 4.00 mm shank diameter. Primary rated workpiece material is titanium alloy per Series 329 specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation of this bit should be performed by qualified machinists or tool-and-die professionals familiar with cutting tool setup. Ensure the drill chuck or collet is fully tightened and the shank is fully seated before operation. Power down the machine and lock out energy sources before changing bits. Do not exceed the rated maximum drilling depth of 22.00 mm to avoid bit deflection or breakage.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 4.00 mm (0.1575 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 55.00 mm (2.1654 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 22.00 mm (0.8661 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 33.00 mm (1.2992 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 4.00 mm (0.1575 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 22.00 mm (0.8661 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 130 degrees\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard with Web Thinning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered\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\u003eFinish\/Coating\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Titanium Alloy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Length Type\u003c\/strong\u003e: Stub (Screw Machine Length)\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 -0.018 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: DIN 1897\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 329\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: 9003290040000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51748256710962,"sku":"9003290040000","price":15.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/500bcb13630365f3f57c8d23a0b7b46b_21531ca9-72d9-4fde-a484-7ea2e9668dab.jpg?v=1788891240","url":"https:\/\/voomisupply.com\/products\/guhring-9003290040000-cobalt-stub-drill-bit-4mm","provider":"Voomi Supply","version":"1.0","type":"link"}