{"product_id":"guhring-9038990016800-micro-drill-bit-1-68mm-carbide","title":"Guhring 9038990016800 Micro Drill Bit 1.68mm Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9038990016800 is a solid carbide micro drill bit engineered for precision drilling in demanding industrial and machining applications. Built from K40-grade solid carbide with a TiAlN coating, this bit delivers extended tool life and heat resistance at high cutting speeds. It features a 140-degree faceted point angle and a web-thinned geometry that reduces entry force and improves chip evacuation. With a 1.68 mm diameter and a 38 mm overall length, this tool is sized for tight-tolerance bores where accuracy and repeatability are critical. It is a right-hand cut tool intended for use in CNC machining centers, drill presses, and precision manual setups.\u003c\/p\u003e\u003cp\u003eThis micro drill bit is designed for drilling cast iron and steel workpieces in production and toolroom environments. The spiral flute with a 5xD flute-to-diameter ratio and a 12 mm flute length supports chip clearance in depths up to 9.48 mm. The straight-cylindrical shank at 3.00 mm diameter seats directly into standard collets and chucks. It suits applications in aerospace, automotive, die-and-mold, and general precision machining where small-diameter, close-tolerance holes are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eK40-grade solid carbide substrate for rigidity and wear resistance in ferrous materials\u003c\/li\u003e\n\u003cli\u003eTiAlN coating provides oxidation resistance and extends cutting life at elevated temperatures\u003c\/li\u003e\n\u003cli\u003e140-degree faceted point minimizes walking and reduces thrust force on entry\u003c\/li\u003e\n\u003cli\u003eWeb-thinned geometry improves chip flow and reduces heat buildup at the cutting tip\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank with h7 diameter tolerance for precise collet and chuck fitment\u003c\/li\u003e\n\u003cli\u003e5xD flute ratio supports drilling depths up to 9.48 mm without parabolic flute requirements\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-specification micro drill bit within the GUHRING Series 3899, suited for CNC and manual drilling operations in cast iron and steel workpieces where a 1.68 mm bore diameter is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by a qualified machinist or toolroom technician. Secure the shank fully in a precision collet or drill chuck rated for the shank diameter before operating. Verify spindle runout is within acceptable tolerance for micro-diameter tooling, as excess runout accelerates tool breakage at this diameter. Follow machine manufacturer guidelines for feed rate and spindle speed when working with solid carbide micro tools.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 1.68 mm (0.0661 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: 9.48 mm (0.3730 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3.00 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\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\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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: 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\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\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\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: 9038990016800\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51727991079218,"sku":"9038990016800","price":49.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3b1ff8f610a0e8d8a5a6079767ab2b1_7e7e1771-cd28-4513-832f-6ec362e7443c.jpg?v=1788685633","url":"https:\/\/voomisupply.com\/products\/guhring-9038990016800-micro-drill-bit-1-68mm-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}