{"product_id":"hertel-42079-cobalt-jobber-drill-bit-4-5mm-135-deg","title":"Hertel 42079 Cobalt Jobber Drill Bit 4.5mm 135 Deg","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 42079 is a cobalt jobber-length drill bit designed for drilling in hard and abrasive materials including stainless steel, hardened alloys, and high-tensile metals. Built to M35 material grade, the bit features a 135-degree split point that reduces walking and cutting pressure on entry, and an oxide and gold coating that improves lubricity and heat resistance. At 4.5 mm in diameter with an overall length of 3.15 inches (80 mm), it fits standard straight-shank chucks and is suited to bench drill presses, hand drills, and CNC drilling operations. Installation and use are handled by machinists, maintenance technicians, and metalworking tradespeople.\u003c\/p\u003e\u003cp\u003eThis bit is intended for right-hand cutting in metal fabrication, maintenance and repair, and production drilling environments. The spiral flute with regular helix promotes efficient chip evacuation in deep-hole applications. The 47 mm (1.85-inch) flute length provides adequate clearance for typical jobber-depth holes in ferrous and non-ferrous stock. The 5xD flute-to-diameter ratio makes this bit suitable for general-purpose industrial and trade use across a range of workpiece thicknesses.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM35 cobalt steel construction for drilling hardened and heat-resistant alloys\u003c\/li\u003e\n\u003cli\u003e135-degree split point reduces thrust force and self-centers on entry\u003c\/li\u003e\n\u003cli\u003eOxide and gold coating improves heat dissipation and extends cutting life\u003c\/li\u003e\n\u003cli\u003eRegular spiral flute with right-hand cutting direction for standard drilling operations\u003c\/li\u003e\n\u003cli\u003eStraight cylindrical shank fits standard drill chucks without modification\u003c\/li\u003e\n\u003cli\u003eNo coolant-through design — suitable for use with external cutting fluid application\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard jobber-length drill bit with a straight cylindrical shank, compatible with drill chucks accepting 4.5 mm shank diameters on bench drill presses, hand-held power drills, and CNC machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eSecure the workpiece firmly before drilling to prevent movement. Power down and de-energize any machine tool before changing or seating the bit in the chuck. Apply cutting fluid or oil externally when drilling ferrous metals to reduce heat buildup and extend tool life. Follow applicable shop safety standards and machine manufacturer guidelines for proper chuck torque and spindle speed selection based on material and bit diameter.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 4.5 mm (0.1772 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 80 mm (3.15 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 47 mm (1.85 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\u003eMaterial Grade\u003c\/strong\u003e: M35 Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Oxide and Gold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral (Regular Helix)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute by Diameter Ratio\u003c\/strong\u003e: 5xD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.14 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: 42079\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51733412708658,"sku":"42079","price":34.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b14762438f58df22eaa2d8b97a99fc81.jpg?v=1788755364","url":"https:\/\/voomisupply.com\/products\/hertel-42079-cobalt-jobber-drill-bit-4-5mm-135-deg","provider":"Voomi Supply","version":"1.0","type":"link"}