{"product_id":"precision-twist-drill-5997161-jobber-drill-bit-21-64","title":"Precision Twist Drill 5997161 Jobber Drill Bit 21\/64","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PRECISION TWIST DRILL 5997161 is a jobber-length drill bit designed for general-purpose drilling in a wide range of materials. It carries a 21\/64 inch (0.3281 inch decimal) diameter and is manufactured from high-speed steel with a bright, uncoated finish. The 135-degree split point reduces walking on entry and lowers thrust requirements compared to a standard 118-degree point. A parabolic spiral flute with web thinning promotes efficient chip evacuation and helps maintain cutting performance in deeper holes. This bit is suited for use by machinists, pipefitters, HVAC technicians, electricians, and plumbers drilling through ferrous and non-ferrous metals during fabrication or service work.\u003c\/p\u003e\n\u003cp\u003eThe 5997161 is appropriate for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The straight cylindrical shank fits standard 3-jaw drill chucks found on portable drills, drill presses, and magnetic base drills. With a flute-to-diameter ratio of 10xD, this bit handles depths up to 3-5\/16 inches, making it practical for structural steel, sheet metal stacks, pipe flanges, and panel work encountered in mechanical and electrical trade applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e135-degree split point reduces drill walking and decreases feed force on entry\u003c\/li\u003e\n  \u003cli\u003eHigh-speed steel construction provides durability across steel, stainless steel, cast iron, and non-ferrous metals\u003c\/li\u003e\n  \u003cli\u003eParabolic spiral flute with web thinning improves chip evacuation and reduces heat buildup\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank fits standard 3-jaw chucks without adapters\u003c\/li\u003e\n  \u003cli\u003eMaximum drilling depth of 3-5\/16 inches supports most field and shop drilling tasks\u003c\/li\u003e\n  \u003cli\u003eANSI-standard geometry; heavy-duty grade for demanding applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose jobber-length drill bit compatible with any standard 3-jaw drill chuck accepting a 21\/64 inch straight cylindrical shank. Suitable for portable drills, benchtop drill presses, and magnetic base drills used in trade and shop environments.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists and trade professionals using standard drill chucks; secure the shank fully and verify chuck tightness before operation. Always wear appropriate eye protection and ensure the workpiece is firmly clamped before drilling. For best results in stainless steel and hard alloys, use cutting fluid to reduce heat and extend bit life. Do not exceed the manufacturer-rated maximum drilling depth of 3-5\/16 inches per pass without retracting to clear chips.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 21\/64 inch (0.3281 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4-5\/8 inches (4.6250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3-5\/16 inches (3.3125 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 3-5\/16 inches (3.3125 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 21\/64 inch (0.3281 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1-5\/16 inches (1.3125 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\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: Parabolic Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Non-Ferrous Metal, Superalloys and Titanium, Hard Material\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Performance\u003c\/strong\u003e: General Purpose, Heavy Duty Grade\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDouble Margin\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 10xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: QC21P\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.083 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 5997161\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51711083381042,"sku":"5997161","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/14c3de90969c6378087aaa7d157a7434_e01dad93-9935-4a9e-b4de-9db1ffe05e43.jpg?v=1788474218","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5997161-jobber-drill-bit-21-64","provider":"Voomi Supply","version":"1.0","type":"link"}