{"product_id":"precision-twist-drill-5996386-letter-s-jobber-drill-bit","title":"Precision Twist Drill 5996386 Letter S Jobber Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5996386 is a Letter S jobber-length drill bit ground from high-speed steel (HSS) with a straw bronze coating for heat resistance and lubricity. It is sized at 0.3480 inches in diameter and features a 135-degree split-point geometry with web thinning for fast penetration and reduced walking on entry. The two-flute, regular spiral design evacuates chips efficiently in through-hole and blind-hole drilling applications. At 4.875 inches overall length with a 3.5-inch flute length, it fits standard drill chucks without an adapter. Licensed HVAC, plumbing, electrical, and mechanical trades reach for this type of bit when drilling through high-temp alloys, cast iron, and ferrous materials on the job.\u003c\/p\u003e\u003cp\u003eThis bit is designed for heavy-duty general-purpose drilling in high-temperature alloys and similar hard metals, making it a standard choice for industrial maintenance, mechanical contractors, and trade fabrication work. The straight cylindrical shank seats directly in keyed or keyless chucks on corded and cordless drills and drill presses. The HX10-HX15-HX18 series designation indicates it is engineered to a 10xD flute-to-diameter ratio, suited for moderate-depth holes up to 3.5 inches. It carries an ANSI specification designation and is rated for right-hand cutting only.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter S diameter: 0.3480 inches for precise letter-size hole tolerance\u003c\/li\u003e\n\u003cli\u003e135-degree split point with web thinning reduces thrust and eliminates center-punch requirements on most materials\u003c\/li\u003e\n\u003cli\u003eHSS construction with straw bronze coating improves surface hardness and heat dissipation\u003c\/li\u003e\n\u003cli\u003eRegular spiral, two-flute design promotes clean chip ejection in deep drilling\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank fits standard drill chucks without reduction sleeves\u003c\/li\u003e\n\u003cli\u003eMeets ANSI specification standards; rated for high-temp alloy workpieces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard three-jaw drill chucks accepting 0.3480-inch straight-shank tooling; part of the PRECISION TWIST DRILL HX10-HX15-HX18 series for heavy-duty general-purpose drilling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall and remove drill bits only with the drill or drill press fully powered down and, where applicable, unplugged or locked out per OSHA lockout-tagout procedures. Secure the shank fully in the chuck and confirm the chuck key is removed before operation. Use appropriate cutting fluid or coolant when drilling high-temp alloys to extend tool life; note that this bit is not coolant-through rated. Proper RPM selection based on material and diameter should follow published speeds-and-feeds charts for HSS tooling.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal Inch)\u003c\/strong\u003e: 0.3480 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 135 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: High-Speed Steel (HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.875 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3480 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 3.5 inches\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\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: High-Temp Alloy\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: HX10-HX15-HX18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute By Diameter Ratio\u003c\/strong\u003e: 10xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Grade\u003c\/strong\u003e: Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification Designation\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.03 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: 5996386\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":67909809963314,"sku":"5996386","price":19.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/164a426c244a50dcd1df57227d075760_ef84dc40-8b1a-48fc-96d6-073b62054fe2.jpg?v=1791192887","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5996386-letter-s-jobber-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}