{"product_id":"guhring-9003050005000-cobalt-drill-bit-0-5-mm-series-305","title":"Guhring 9003050005000 Cobalt Drill Bit 0.5 Mm Series 305","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9003050005000 is a cobalt jobber length drill bit designed for precision drilling in demanding ferrous materials. Built to DIN 338 standards, it features a 0.5 mm diameter, a 118-degree cone relief point, and a bright uncoated finish. The two-flute spiral design with a regular flute type promotes efficient chip evacuation during operation. Web thinning reduces thrust requirements at entry, making this bit suitable for controlled drilling applications where small-diameter precision is critical. Licensed HVAC technicians, machinists, and trade professionals working with steel and cast iron reach for cobalt-grade tooling when high-speed steel alone is not sufficient.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for general-purpose drilling in cast iron and steel workpieces across light industrial and trade service environments. With a 5xD flute-to-diameter ratio, it is optimized for shallow-to-moderate depth holes in typical bench-top and handheld drilling scenarios. The straight-cylindrical shank fits standard drill chucks without modification, making it a straightforward replacement in Series 305 applications. Its compact overall length of 22 mm makes it practical in tight-access drilling situations common in field service work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt construction for improved hardness and heat resistance in ferrous materials\u003c\/li\u003e\n\u003cli\u003e118-degree cone relief point with web thinning for reduced entry thrust\u003c\/li\u003e\n\u003cli\u003eDIN 338 standard jobber length format for broad chuck compatibility\u003c\/li\u003e\n\u003cli\u003eTwo-flute regular spiral design for efficient chip removal\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank with h8 diameter tolerance for accurate chuck seating\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish — no coating buildup to affect dimensional accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement fitting GUHRING Series 305 tooling specifications per DIN 338. Primary workpiece materials are cast iron and steel (material codes K and P).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or trade professionals familiar with small-diameter drill bit handling. Secure the straight-cylindrical shank fully in a properly sized drill chuck before operation. At 0.5 mm diameter, feed rate and spindle speed must be carefully controlled to prevent bit breakage — consult published speed-and-feed tables for cobalt tooling in the target material. Coolant-through is not supported on this bit; use external cutting fluid as appropriate for the workpiece material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.5 mm (0.0197 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 22 mm (0.866 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 6 mm (0.236 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 16 mm (0.630 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.5 mm (0.0197 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 5.25 mm (0.207 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\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\u003ePoint Type\u003c\/strong\u003e: Cone Relief\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: h8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\/Coating\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Cast Iron, Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 305\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: DIN 338\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: General Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.009 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: 9003050005000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51732853424434,"sku":"9003050005000","price":93.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0d92e13879f09a076e8541f50cdf4eb5_0a429f1e-d6f5-4578-ba28-736a30cae417.jpg?v=1788747554","url":"https:\/\/voomisupply.com\/products\/guhring-9003050005000-cobalt-drill-bit-0-5-mm-series-305","provider":"Voomi Supply","version":"1.0","type":"link"}