{"product_id":"hertel-42213-cobalt-screw-machine-drill-bit-7-16-inch","title":"Hertel 42213 Cobalt Screw Machine Drill Bit 7\/16 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 42213 is a screw machine length cobalt drill bit designed for drilling into hard and abrasion-resistant metals. Built from M35 cobalt high-speed steel, it delivers greater heat resistance than standard HSS bits, making it well-suited for applications where tooling runs hot or workpiece hardness causes rapid wear. The 135-degree split point geometry reduces thrust force and self-centers without a pilot hole. An oxide straw finish provides mild lubricity and corrosion resistance. At 3.4375 inches overall length with a 2.0625-inch spiral flute, the screw machine length body is shorter and more rigid than jobber-length equivalents, reducing deflection in close-quarters drilling.\u003c\/p\u003e\n\u003cp\u003eThis drill bit is intended for production and maintenance drilling in hardened materials, heat-treatable alloy steels, stainless steel, and titanium alloy. The shorter screw machine length profile suits drill press, milling machine, and CNC turret applications where minimal overhang and maximum rigidity are priorities. It is commonly used by machinists, tool-and-die tradespeople, and industrial maintenance technicians working on high-strength fastener holes, fixture plates, and structural stainless components. The regular spiral flute handles chip evacuation efficiently in these demanding base materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM35 cobalt steel construction resists heat buildup when drilling stainless steel, titanium alloy, and hardened alloy steels\u003c\/li\u003e\n  \u003cli\u003e135-degree split point self-centers and reduces feed pressure compared to a conventional 118-degree point\u003c\/li\u003e\n  \u003cli\u003eScrew machine length body (3.4375 inches overall) provides a shorter, more rigid profile than jobber-length bits\u003c\/li\u003e\n  \u003cli\u003eOxide straw finish adds surface lubricity and basic corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eRegular spiral flute with 2.0625-inch flute length promotes consistent chip evacuation\u003c\/li\u003e\n  \u003cli\u003eNo coolant-through requirement simplifies tooling setup on standard drill presses and CNC turrets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in drilling hardened materials, heat-treatable alloyed steels, stainless steel, and titanium alloy; fits any standard drill chuck or collet accepting a 7\/16-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis bit is installed and operated by machinists or maintenance technicians using a drill press, lathe, milling machine, or CNC turret equipped with a compatible chuck or collet. Secure the shank fully in the chuck before operation and confirm runout is within acceptable tolerance for the application. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, even though the bit does not require through-coolant. Inspect the cutting edges for chipping or heat discoloration before reuse on critical-dimension holes.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Size\u003c\/strong\u003e: 7\/16 inch (0.4375 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.4375 inches (3-7\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.0625 inches (2-1\/16 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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt (M35 grade)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide Straw\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 3xD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Hardened Materials, Heat-Treatable Alloyed Steels, Stainless Steel, Titanium Alloy\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: 0.14 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 42213\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51751877378354,"sku":"42213","price":23.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bf4d6b8507ac4ee8dc5ad28f0a272af1.jpg?v=1788924534","url":"https:\/\/voomisupply.com\/products\/hertel-42213-cobalt-screw-machine-drill-bit-7-16-inch","provider":"Voomi Supply","version":"1.0","type":"link"}