{"product_id":"guhring-9038990007400-micro-drill-bit-no-69-solid-carbide","title":"Guhring 9038990007400 Micro Drill Bit No. 69 Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GUHRING 9038990007400 is a solid carbide micro drill bit designed for precision drilling in tight-tolerance applications. Built to Series 3899 specifications, it carries a No. 69 wire-gauge designation with a decimal diameter of 0.0291 inches and a 140-degree faceted point angle. The TiAlN coating improves heat resistance and extends tool life in abrasive or high-speed cutting environments. With an overall length of 38 mm and a straight-cylindrical shank, this bit seats securely in standard drill chucks and collet holders. Web thinning reduces thrust force at entry and helps maintain hole positional accuracy. Machinists and tool-and-die professionals working with close-tolerance small-diameter holes will find this bit suited to production and precision rework tasks.\u003c\/p\u003e\u003cp\u003eThis drill bit is intended for use in small-hole drilling operations on primary workpiece materials including cast iron and steel. It is well suited for CNC machining centers, drill presses, and precision hand-held drilling fixtures where a straight-cylindrical shank bit is required. The 5xD flute-by-diameter ratio and spiral flute geometry support chip evacuation in shallow-to-moderate drilling depths up to 6.89 mm. No coolant-through capability is present, so external coolant or cutting fluid should be applied when drilling in production volumes or harder steel grades.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eNo. 69 wire size, 0.0291 inch decimal diameter with h7 diameter tolerance for close-fit applications\u003c\/li\u003e\n\u003cli\u003e140-degree faceted point angle with web thinning to reduce entry thrust and improve positional accuracy\u003c\/li\u003e\n\u003cli\u003eTiAlN coating for elevated heat resistance and extended tool life in cast iron and steel\u003c\/li\u003e\n\u003cli\u003eSolid carbide K40 grade construction for rigidity and wear resistance in small-diameter drilling\u003c\/li\u003e\n\u003cli\u003eStraight-cylindrical shank with 3 mm shank diameter for compatibility with standard collets and chucks\u003c\/li\u003e\n\u003cli\u003eSpiral flute with regular spiral type promotes chip evacuation throughout the cutting depth\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style precision micro drill bit in GUHRING Series 3899, suitable for use in CNC machining centers and precision drilling fixtures that accept a 3 mm straight-cylindrical shank. Rated for primary workpiece materials cast iron and steel per material codes K and P.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the collet or chuck. Confirm shank seating depth and runout with a dial indicator before production drilling to preserve h7 hole tolerance. Because this bit has no coolant-through capability, apply external cutting fluid at the drill point when working in steel or during extended production runs to manage heat buildup.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: No. 69\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter (Decimal Inch)\u003c\/strong\u003e: 0.0291 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: 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 6.89 mm (0.2710 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 mm\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\u003eWeb Thinning\u003c\/strong\u003e: Web-Thinned\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\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: 9038990007400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GUHRING","offers":[{"title":"Default Title","offer_id":51732977582386,"sku":"9038990007400","price":46.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a3b1ff8f610a0e8d8a5a6079767ab2b1_f6d1900b-731e-480b-b96a-016993ea25fe.jpg?v=1788749877","url":"https:\/\/voomisupply.com\/products\/guhring-9038990007400-micro-drill-bit-no-69-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}