{"product_id":"hertel-73041477-cobalt-drill-bit-no-27-135-split-point","title":"Hertel 73041477 Cobalt Drill Bit No. 27 135 Split Point","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 73041477 is a cobalt threaded shank drill bit designed for drilling into high-tensile strength materials including hardened steels, stainless steel, and other tough alloys. It carries a No. 27 wire gauge size, equivalent to 0.1440 inches in diameter, and features a 135-degree split point for fast, accurate starts without center-punching. The oxide coating adds surface hardness and helps resist heat buildup during aggressive drilling operations. The 1\/4-28 threaded shank provides positive engagement with compatible toolholders, preventing slippage under torque. Overall length is 2.125 inches with a 1.125-inch flute length. Cutting direction is right-hand with a regular spiral flute and tapered web configuration.\u003c\/p\u003e\u003cp\u003eThis bit is intended for production and maintenance drilling in metalworking environments where standard high-speed steel tooling fails prematurely. The cobalt construction makes it well-suited for aerospace, defense, and industrial fabrication applications that reference NAS 965 specifications. Typical users include machinists, maintenance technicians, and sheet metal workers drilling high-strength ferrous and nickel-based alloys. The web-thinned point reduces thrust requirements and extends tool life in difficult materials.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt construction for use in high-tensile strength and heat-resistant materials\u003c\/li\u003e\n\u003cli\u003e135-degree split point starts on contact and reduces walking without a center punch\u003c\/li\u003e\n\u003cli\u003eOxide coating improves surface hardness and dissipates heat during cutting\u003c\/li\u003e\n\u003cli\u003e1\/4-28 threaded shank locks securely into compatible threaded toolholders\u003c\/li\u003e\n\u003cli\u003eWeb-thinned, tapered web design lowers drilling thrust and improves chip evacuation\u003c\/li\u003e\n\u003cli\u003eMeets NAS 965 specification for aerospace and industrial applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with toolholders and drill fixtures accepting a 1\/4-28 threaded shank. Suitable for general-purpose drilling in high-tensile strength ferrous and non-ferrous materials per NAS 965 specification requirements.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use should be performed by qualified machinists or maintenance technicians familiar with metalworking drill press, CNC, or hand-drill operations. Ensure the machine spindle is fully stopped and locked out before changing or inspecting tooling. Thread the shank fully into the holder and confirm secure engagement before applying cutting load. Use appropriate cutting fluid for the base material to maximize tool life and hole quality.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Wire)\u003c\/strong\u003e: No. 27\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Decimal)\u003c\/strong\u003e: 0.1440 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\u003eShank Type\u003c\/strong\u003e: Threaded Square\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Thread Size\u003c\/strong\u003e: 1\/4-28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 1.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, 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: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: High-Tensile Strength Material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecification\u003c\/strong\u003e: NAS 965\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: 0.2 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: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 73041477\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51728876831026,"sku":"73041477","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/496d3d3a67027280cc96a2996c2c00a4.jpg?v=1788697266","url":"https:\/\/voomisupply.com\/products\/hertel-73041477-cobalt-drill-bit-no-27-135-split-point","provider":"Voomi Supply","version":"1.0","type":"link"}