{"product_id":"guhring-9038990004800-micro-drill-bit-0-48mm-carbide","title":"Guhring 9038990004800 Micro Drill Bit 0.48mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9038990004800 is a solid carbide micro drill bit designed for precision drilling in demanding metalworking applications. Built to Series 3899 specifications, it features a 0.48 mm diameter with a 140-degree faceted point angle and a TiAlN coating that extends tool life in abrasive materials. The straight-cylindrical shank measures 3.00 mm in diameter, making it compatible with standard collet chucks used in CNC machining centers and precision drill presses. Web thinning reduces thrust force at entry, which is critical when working at this scale. Licensed machinists and tool-and-die professionals are the primary installers of this bit.\u003c\/p\u003e\u003cp\u003eThis micro drill bit is suited for precision drilling in cast iron and steel workpieces, matching primary material codes K and P. The 5xD flute-to-diameter ratio and 7.00 mm flute length support a maximum drilling depth of 6.28 mm (0.247 inches). It is well matched to high-speed CNC operations where tight tolerances and consistent hole geometry are required. The h7 diameter tolerance ensures repeatable fitment in precision boring and assembly workflows common in automotive, mold-making, and general machining environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.48 mm diameter with h7 tolerance for tight, repeatable hole geometry\u003c\/li\u003e\n\u003cli\u003e140-degree faceted point angle reduces walking and improves entry accuracy\u003c\/li\u003e\n\u003cli\u003eTiAlN coating provides heat and wear resistance in ferrous materials\u003c\/li\u003e\n\u003cli\u003eWeb-thinned geometry lowers cutting thrust at micro diameters\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction in K40 grade for rigidity at small diameters\u003c\/li\u003e\n\u003cli\u003eSpiral flute, right-hand cut with regular spiral type for consistent chip evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in cast iron and steel workpieces; compatible with standard collet chucks accepting a 3.00 mm straight-cylindrical shank. Part of the GUHRING Series 3899 micro drill line.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or tooling technicians familiar with CNC or precision drill press operations. Ensure the spindle and collet are fully de-energized and at rest before changing tooling. Verify collet runout is within acceptable limits before use, as excessive runout at micro diameters accelerates tool wear and increases breakage risk. Do not exceed the manufacturer-rated maximum drilling depth of 6.28 mm in a single pass without appropriate peck-drilling cycles.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 0.48 mm (0.0189 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Angle\u003c\/strong\u003e: 140 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Faceted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide, K40 Grade\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 38.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 7.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 6.28 mm (0.247 inches)\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: 3.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: h7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 5xD\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: 3899\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.003 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: 9038990004800\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51727234597170,"sku":"9038990004800","price":53.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3b1ff8f610a0e8d8a5a6079767ab2b1_a9c8eb78-a1f7-4bc8-9494-8f21d5b679c3.jpg?v=1788675143","url":"https:\/\/voomisupply.com\/products\/guhring-9038990004800-micro-drill-bit-0-48mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}