{"product_id":"hertel-74131269-letter-o-cobalt-drill-bit-135-deg","title":"Hertel 74131269 Letter O Cobalt Drill Bit 135 Deg","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 74131269 is a screw machine length cobalt drill bit in Letter O size (0.3160 inches decimal equivalent), designed for high-speed drilling in tough materials including stainless steel, heat-treated alloys, and hardened steels. The 135-degree split point reduces walking and lowers the thrust needed to start a hole without a center punch. Web thinning further reduces cutting resistance at the tip. At 2-15\/16 inches overall length, the screw machine format gives rigidity in short-reach applications such as drill press work, CNC turrets, and hand-held drilling in tight spaces. Machinists, tool-and-die workers, and maintenance mechanics are the primary users.\u003c\/p\u003e\n\u003cp\u003eThis bit suits production and job-shop environments where shorter flute length and maximum rigidity matter more than deep-hole reach. The straight cylindrical shank fits standard drill chucks without adapters. Regular spiral flutes with a parallel web configuration evacuate chips cleanly in both ferrous and non-ferrous materials. Typical applications include tapping prep holes, through-hole drilling in structural steel, and general metalworking operations where cobalt grade tooling is specified for heat resistance and edge retention at elevated cutting speeds.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLetter O size  -  0.3160 inches decimal equivalent, within the 0.3000 to 0.3500 inch size range\u003c\/li\u003e\n  \u003cli\u003e135-degree split point for self-centering starts and reduced thrust requirements\u003c\/li\u003e\n  \u003cli\u003eCobalt (HSS-Co) tool material for heat resistance in hard and abrasive metals\u003c\/li\u003e\n  \u003cli\u003eWeb-thinned parallel web configuration reduces cutting resistance at the tip\u003c\/li\u003e\n  \u003cli\u003eScrew machine length (2-15\/16 inches OAL) provides rigidity for short-reach drilling\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting with regular spiral flutes for efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eStraight cylindrical shank fits standard drill chucks without special adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct substitute for Letter O screw machine length cobalt drill bits in any standard drill chuck accepting a straight cylindrical shank. Part of the HSCO135 series.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists, toolroom technicians, or maintenance mechanics. Secure the shank fully into the drill chuck and verify runout before beginning a cut. When drilling hard alloys, use appropriate cutting fluid to extend tool life and manage heat buildup. Do not exceed the recommended surface footage for cobalt tooling in the material being drilled, and never reverse-run a spiral-flute bit to clear chips.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: Letter O\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDecimal Equivalent\u003c\/strong\u003e: 0.3160 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\u003ePoint Type\u003c\/strong\u003e: Split Point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (HSS-Co)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Straw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-15\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1-11\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\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: Parallel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeb Thinning\u003c\/strong\u003e: 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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize Range\u003c\/strong\u003e: 0.3000 to 0.3500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HSCO135\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23241635\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.29 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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 74131269\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51739457847602,"sku":"74131269","price":18.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ba3faf3c425352f04044d617b05d60d4.jpg?v=1788814818","url":"https:\/\/voomisupply.com\/products\/hertel-74131269-letter-o-cobalt-drill-bit-135-deg","provider":"Voomi Supply","version":"1.0","type":"link"}