{"product_id":"hertel-74147497-cobalt-drill-bit-39-64-in-1-2-in-shank","title":"Hertel 74147497 Cobalt Drill Bit 39\/64 in 1\/2 in Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 74147497 is a reduced shank cobalt drill bit designed for drilling tough, high tensile strength materials in demanding industrial and trade applications. The bit measures 39\/64 inch (0.6094 inch) in diameter with a 1\/2 inch straight-cylindrical shank, allowing it to seat in standard 1\/2 inch chucks even though the cutting diameter is larger. Overall length is 6 inches with a 3 inch flute length. The 118-degree standard point angle provides a reliable, self-centering entry. The oxide straw finish helps reduce friction and surface wear during cutting.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for machinists, tool-and-die workers, maintenance mechanics, and fabricators who regularly work with alloy steels, stainless steels, and other tough high tensile strength materials. The cobalt construction maintains cutting hardness at elevated temperatures, making it appropriate for production drilling where heat buildup is a concern. Right-hand cut spiral flutes evacuate chips efficiently during through-hole and blind-hole operations in both shop and field environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt tool material retains hardness under high heat, extending tool life in tough alloys\u003c\/li\u003e\n\u003cli\u003eReduced shank design allows 39\/64 inch cutting diameter to run in a standard 1\/2 inch chuck\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle for reliable self-centering on most materials\u003c\/li\u003e\n\u003cli\u003eOxide straw finish reduces friction and protects the flute surface\u003c\/li\u003e\n\u003cli\u003e3 inch flute length provides a maximum drilling depth of 3 inches\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, regular spiral flutes for efficient chip evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use reduced shank cobalt drill bit compatible with any drill press, milling machine, or hand drill accepting a 1\/2 inch straight-cylindrical shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed by a machinist or maintenance mechanic using a 1\/2 inch drill chuck on a drill press, milling machine, or heavy-duty hand drill. Ensure the chuck is fully tightened and the workpiece is firmly clamped before drilling. No coolant is required per specification, but reducing feed pressure when breaking through the far side of the workpiece helps prevent bit deflection and burring. Inspect the cutting edges for wear regularly when drilling abrasive or hardened materials.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 39\/64 inch (0.6094 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide Straw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Tough High Tensile Strength Materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Required\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: 74147497\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51740119892274,"sku":"74147497","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a0073659e94776e2314a3f78fedc42e9.jpg?v=1788822498","url":"https:\/\/voomisupply.com\/products\/hertel-74147497-cobalt-drill-bit-39-64-in-1-2-in-shank","provider":"Voomi Supply","version":"1.0","type":"link"}