{"product_id":"sgs-66644-taper-length-drill-bit-21-64-in-solid-carbide","title":"Sgs 66644 Taper Length Drill Bit 21\/64 in Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SGS 66644 is a taper length drill bit built from micrograin solid carbide and finished with a TX coating for extended tool life in demanding applications. Measuring 21\/64 inches (0.2677 inches decimal) in diameter, it features a 135-degree split point for accurate, self-centering starts without a center punch. The spiral flute geometry with web-thinned construction reduces cutting resistance and improves chip evacuation. At 5.5938 inches overall length with a 2.9921-inch flute, this bit is designed for through-hole and deep-hole work where a standard-length drill falls short. It is sold individually and is appropriate for use by machinists, tool-and-die tradespeople, and precision manufacturing operations.\u003c\/p\u003e\u003cp\u003eThe SGS 66644 is suited for universal material applications including steel, stainless alloys, cast iron, aluminum, and non-ferrous materials. The TX coating provides thermal resistance during high-speed cutting cycles. The cylindrical shank diameter of 8.00 mm seats directly into standard drill chucks, collets, and milling machine spindles. Coolant-through capability makes it compatible with CNC machining centers and drill presses equipped with through-spindle coolant delivery, supporting consistent chip clearing in deep-hole operations at an 8xD flute-to-diameter ratio.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMicrograin solid carbide construction for rigidity and wear resistance in high-performance drilling\u003c\/li\u003e\n\u003cli\u003eTX coating applied for heat and abrasion resistance during extended cutting cycles\u003c\/li\u003e\n\u003cli\u003e135-degree standard split point provides self-centering entry and reduces thrust requirements\u003c\/li\u003e\n\u003cli\u003eWeb-thinned geometry lowers cutting force and improves chip flow\u003c\/li\u003e\n\u003cli\u003eCoolant-through design supports through-spindle coolant delivery on CNC platforms\u003c\/li\u003e\n\u003cli\u003eCylindrical shank compatible with standard collets and drill chucks; conforms to DIN 6537 specification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a high-performance OEM-style replacement or production drill bit for use in CNC machining centers, drill presses, and manual machines accepting an 8.00 mm cylindrical shank. No specific model compatibility was provided in the product data.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by a qualified machinist or tooling technician familiar with cutting tool setup. Ensure spindle and workpiece are fully secured and all guards are in place before operation. Confirm shank diameter compatibility with the chuck or collet before mounting and verify coolant lines are clear if through-spindle coolant is used. Follow shop safety procedures and applicable OSHA machining standards when operating rotating cutting tools.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 142P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter (Inch)\u003c\/strong\u003e: 21\/64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter (Decimal Inch)\u003c\/strong\u003e: 0.2677 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter (mm)\u003c\/strong\u003e: 6.80 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Micrograin Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TX\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\u003eFlute Length (Decimal Inch)\u003c\/strong\u003e: 2.9921 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length (mm)\u003c\/strong\u003e: 76.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length x Diameter Ratio\u003c\/strong\u003e: 8xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (Decimal Inch)\u003c\/strong\u003e: 5.5938 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (mm)\u003c\/strong\u003e: 114.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter (mm)\u003c\/strong\u003e: 8.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length (Decimal Inch)\u003c\/strong\u003e: 1.4173 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length (mm)\u003c\/strong\u003e: 35.99 mm\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\u003eCoolant Through\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded Shank\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth (Decimal Inch)\u003c\/strong\u003e: 2.9921 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth (mm)\u003c\/strong\u003e: 76.00 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter Tolerance\u003c\/strong\u003e: +0.00024 \/ +0.00083 inches; +0.006 \/ +0.021 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length (Decimal Inch)\u003c\/strong\u003e: 0.0554 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Length (mm)\u003c\/strong\u003e: 1.41 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Universal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: High Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: DIN 6537\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: SGS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 66644\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"KYOCERA SGS PRECISION TOOLS","offers":[{"title":"Default Title","offer_id":51746982625586,"sku":"66644","price":464.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/947f6ed78cf4a92e725732e5335ce663_9e16476a-65a3-4d3f-b202-4b841513a850.jpg?v=1788875105","url":"https:\/\/voomisupply.com\/products\/sgs-66644-taper-length-drill-bit-21-64-in-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}