{"product_id":"guhring-9038990018000-micro-drill-bit-1-8mm-carbide","title":"Guhring 9038990018000 Micro Drill Bit 1.8mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9038990018000 is a solid carbide micro drill bit designed for precision drilling in demanding industrial applications. Built to Series 3899 specifications, it features a 1.8 mm diameter with an h7 diameter tolerance, a 140-degree faceted point, and a TiAlN coating that improves heat resistance and extends tool life at elevated cutting speeds. The overall length is 38 mm, with a 12 mm flute length and a maximum drilling depth of 9.3 mm. A web-thinned geometry reduces thrust force at entry and helps maintain positional accuracy in small-diameter work. This drill is used by machinists and tooling specialists in production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThis micro drill bit is suited for drilling cast iron and steel in applications where tight tolerances and small bore diameters are required. The straight-cylindrical shank at 3 mm diameter fits standard collet chucks and toolholders commonly found on CNC machining centers, drill presses, and precision bench machines. The 5xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes without coolant-through capability, making it appropriate for short, precise bore operations in ferrous materials.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1.8 mm diameter with h7 tolerance for tight bore accuracy\u003c\/li\u003e\n\u003cli\u003eSolid carbide K40 grade construction for rigidity in micro-diameter applications\u003c\/li\u003e\n\u003cli\u003eTiAlN coating for improved thermal resistance and extended tool life\u003c\/li\u003e\n\u003cli\u003e140-degree faceted point with web-thinned geometry reduces entry thrust\u003c\/li\u003e\n\u003cli\u003eRight-hand spiral flute promotes efficient chip evacuation in ferrous materials\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical 3 mm shank fits standard collet and drill chuck toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in cast iron and steel workpieces. Primary workpiece material codes K and P per ISO classification. Fits standard 3 mm collet chucks and toolholders on CNC and manual machining equipment.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist with the spindle fully stopped and machine power isolated. Ensure the collet or chuck is clean and the shank is fully seated before clamping to rated torque per toolholder manufacturer specifications. Micro-diameter carbide tools are brittle — avoid side loads, interrupted cuts beyond the tool's rated capacity, and re-chucking in worn or contaminated holders. Verify spindle runout is within acceptable limits before drilling to prevent premature breakage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 1.8 mm (0.0709 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 38 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 12 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 9.3 mm (0.366 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point 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\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: K40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\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\u003eCoolant Through\u003c\/strong\u003e: No\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\u003eSeries\u003c\/strong\u003e: 3899\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.003 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241600\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: 9038990018000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51749639684402,"sku":"9038990018000","price":49.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3b1ff8f610a0e8d8a5a6079767ab2b1_dd5d448d-57e9-4a4e-bf1f-7f34d503b328.jpg?v=1788908669","url":"https:\/\/voomisupply.com\/products\/guhring-9038990018000-micro-drill-bit-1-8mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}