{"product_id":"precision-twist-drill-5998029-taper-length-drill-bit-28","title":"Precision Twist Drill 5998029 Taper Length Drill Bit 28","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5998029 is a taper length drill bit from the QC91P series, designed for heavy-duty drilling in a wide range of metals and alloys. Built from high-speed steel (HSS) with a bright\/uncoated finish, it features a 135-degree split point that reduces walking and requires no center punch on most surfaces. The parabolic flute geometry improves chip evacuation and allows faster feed rates compared to standard flute profiles. The web-thinned, tapered web configuration reduces thrust and extends tool life. At 5.375 inches overall length with a 3-inch flute, this bit handles deeper reach applications that standard jobber-length drills cannot.\u003c\/p\u003e\u003cp\u003eThis bit is sized to wire gauge 28 (0.1405 inches decimal equivalent) and is suited for precision hole work in production and maintenance environments. The straight cylindrical shank fits standard drill chucks without adapters. Its taper length body makes it a practical choice for machinists, toolroom technicians, and maintenance mechanics drilling through alloy steel, stainless steel, cast iron, aluminum, brass, bronze, copper, titanium, and similar materials where a jobber-length bit lacks reach or rigidity.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eWire size 28 (0.1405 inches decimal equivalent) for precision-diameter holes\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces drill walk and cutting pressure at entry\u003c\/li\u003e\n\u003cli\u003eParabolic flute design promotes rapid chip evacuation at higher feed rates\u003c\/li\u003e\n\u003cli\u003eWeb-thinned tapered web lowers thrust and extends cutting edge life\u003c\/li\u003e\n\u003cli\u003eTaper length body extends reach beyond standard jobber-length drills\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction rated for heavy-duty general-purpose metalworking\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit replacement or addition for any setup using a standard straight-shank drill chuck; compatible across alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, copper, graphite, hardened steel, magnesium, magnesium alloy, malleable iron, nickel, stainless steel, steel, tempered steel, titanium, and titanium alloy workpieces as specified by the manufacturer.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall into a properly sized drill chuck rated for straight-shank tooling and tighten securely with a chuck key before operation. Power down and lock out the machine before changing bits. Use appropriate cutting fluid or coolant for the workpiece material to maintain cutting edge temperature and prolong tool life. Inspect the cutting edges and web for wear before each use; a dull or chipped split point significantly increases thrust and can cause workpiece damage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: QC91P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: 28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.1405 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High-Speed Steel (HSS)\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: Split\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Parabolic\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\u003eWeb Configuration\u003c\/strong\u003e: Tapered Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy-Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04167 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: PRECISION TWIST DRILL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5998029\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51690877452594,"sku":"5998029","price":32.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/13a7cf21f8ee8e384bfe8d2eff34d2a3.jpg?v=1788276811","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998029-taper-length-drill-bit-28","provider":"Voomi Supply","version":"1.0","type":"link"}