{"product_id":"kennametal-3640679-screw-machine-drill-bit-4-50-mm-tialn","title":"Kennametal 3640679 Screw Machine Drill Bit 4.50 Mm Tialn","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe KENNAMETAL 3640679 is a solid carbide screw machine length drill bit engineered for high-performance drilling in demanding materials. It measures 4.50 mm in diameter with a 140-degree split point and a TiAlN coating designed to extend tool life in abrasive, heat-generating applications. The overall length is 66.00 mm with a flute length of 24.00 mm, a 6.00 mm straight cylindrical shank, and a maximum drilling depth of 17.00 mm. Web thinning with a parallel web configuration reduces thrust force and improves chip evacuation. Coolant-through capability supports consistent performance in deep-hole or high-cycle operations. This bit is suited for machinists, tool-and-die shops, and maintenance technicians working with tight-tolerance bores.\u003c\/p\u003e\u003cp\u003eThis drill bit is optimized for cutting high-temperature alloys and stainless steel, where tool wear and heat buildup are primary concerns. The 3xD flute-to-diameter ratio and regular spiral flute geometry support controlled chip flow in short-hole applications. It conforms to DIN 6537K geometry standards and falls within the B291-YPL series. Typical applications include precision component drilling on CNC machining centers and drill presses where dimensional accuracy and surface finish are critical. The right-hand cutting direction is standard for conventional spindle rotation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction for rigidity and wear resistance in hard materials\u003c\/li\u003e\n\u003cli\u003eTiAlN coating for thermal protection and extended tool life in high-temperature alloys and stainless steel\u003c\/li\u003e\n\u003cli\u003e140-degree point angle reduces thrust and improves self-centering on entry\u003c\/li\u003e\n\u003cli\u003eWeb-thinned parallel web lowers cutting force and enhances chip clearance\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports high-cycle and deep-hole drilling operations\u003c\/li\u003e\n\u003cli\u003eDIN 6537K specification ensures consistent geometry and interchangeability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNC machining centers and drill presses accepting a 6.00 mm straight cylindrical shank. Primary workpiece materials are high-temperature alloys and stainless steel, per manufacturer specification for the B291-YPL series.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis tool is installed and changed by machinists or tooling technicians following standard lockout and spindle-stop procedures before any tool change. Use a properly sized collet or drill chuck rated for the 6.00 mm shank diameter to ensure runout is within acceptable limits. Coolant-through connection should be verified at the spindle interface before operation. Do not exceed the manufacturer-rated maximum drilling depth of 17.00 mm per cycle without retracting to clear chips.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 4.50 mm (0.1772 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 66.00 mm (2.5984 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 24.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 6.00 mm (0.2362 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 36.00 mm (1.4173 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 17.00 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\u003eDrill Point Length\u003c\/strong\u003e: 0.90 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Regular 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\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Parallel Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0.004 to +0.016 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: High Temperature Alloy, Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6537K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: B291-YPL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04 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: KENNAMETAL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3640679\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KENNAMETAL","offers":[{"title":"Default Title","offer_id":51728753721650,"sku":"3640679","price":206.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3adc110a9d5fb4f66a3d62312f0a5a07.jpg?v=1788695853","url":"https:\/\/voomisupply.com\/products\/kennametal-3640679-screw-machine-drill-bit-4-50-mm-tialn","provider":"Voomi Supply","version":"1.0","type":"link"}