{"product_id":"guhring-9038990012000-micro-drill-bit-1-2mm-carbide","title":"Guhring 9038990012000 Micro Drill Bit 1.2mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GUHRING 9038990012000 is a solid carbide micro drill bit designed for precision drilling in demanding industrial and machining applications. It features a 1.2 mm diameter (0.0472 inches), a 140-degree faceted point, and a TiAlN coating that extends tool life under elevated cutting temperatures. The spiral flute geometry promotes efficient chip evacuation, and the web-thinned design reduces thrust force at entry. With an overall length of 38 mm and a 3 mm straight-cylindrical shank, this bit is suited for CNC machining centers, drill presses, and precision hand-fed setups where tight hole tolerances are required. It is installed and operated by machinists and tool-and-die professionals working to close tolerances.\u003c\/p\u003e\n\u003cp\u003eThe 9038990012000 is built for drilling cast iron and steel — ISO material codes K and P — at depths up to 8.2 mm (0.323 inches). The flute-to-diameter ratio of 5xD makes it appropriate for moderately deep micro-holes in production and toolroom environments. The h7 diameter tolerance on the drill ensures consistent, repeatable hole sizing across high-volume runs. This bit does not support coolant-through delivery, so external coolant or misting is the standard approach for heat management in continuous-cycle use.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction with M40 grade carbide substrate for rigidity and wear resistance\u003c\/li\u003e\n  \u003cli\u003eTiAlN coating provides oxidation resistance and extended tool life at elevated cutting speeds\u003c\/li\u003e\n  \u003cli\u003e140-degree faceted point with web thinning reduces entry thrust and improves centering accuracy\u003c\/li\u003e\n  \u003cli\u003eh7 diameter tolerance ensures consistent hole sizing for precision fitment applications\u003c\/li\u003e\n  \u003cli\u003e5xD flute-to-diameter ratio supports drilling depths up to 8.2 mm\u003c\/li\u003e\n  \u003cli\u003eRight-hand spiral flute promotes upward chip evacuation in standard CNC and manual drilling setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a Series 3899 micro drill bit for use in CNC machining centers and precision drilling equipment accepting a 3 mm straight-cylindrical shank. Primary workpiece compatibility is rated for cast iron (ISO code K) and steel (ISO code P).\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation should be performed by qualified machinists familiar with micro-tooling practices. Secure the 3 mm shank in a precision collet or drill chuck rated for the shank diameter to minimize runout. Power down and lock out the spindle before loading or unloading the bit. Because this bit does not support coolant-through delivery, apply external coolant or air mist to control heat buildup during continuous drilling cycles. Avoid excessive feed rates that can cause micro-drill deflection or breakage in hard or interrupted-cut materials.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 1.2 mm (0.0472 inches)\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\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\u003eOverall Length\u003c\/strong\u003e: 38 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 10 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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\u003eMaximum Drilling Depth\u003c\/strong\u003e: 8.2 mm (0.323 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 5xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Tolerance\u003c\/strong\u003e: h7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\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\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: 9038990012000\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51734637445426,"sku":"9038990012000","price":48.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3b1ff8f610a0e8d8a5a6079767ab2b1_ccf449fd-92d8-47b7-a0fb-0cb6c51cb435.jpg?v=1788764204","url":"https:\/\/voomisupply.com\/products\/guhring-9038990012000-micro-drill-bit-1-2mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}