{"product_id":"hertel-91197574-roughing-end-mill-12mm-4-flute-cobalt","title":"Hertel 91197574 Roughing End Mill 12mm 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 91197574 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a bright, uncoated finish, it delivers the toughness and heat resistance needed for ferrous and stainless materials. The cutter measures 12 mm in diameter with a 53 mm length of cut and 110 mm overall length. Four right-hand flutes with a fine pitch configuration drive efficient chip evacuation while reducing chatter during heavy roughing passes. Center-cutting geometry allows plunge entry as well as conventional and climb milling cuts.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for job shop and production machining environments where roughing passes precede finishing operations. It performs in vertical machining centers, knee mills, and CNC milling applications across general metalworking, toolroom, and maintenance repair operations. The cobalt substrate handles elevated cutting temperatures better than standard HSS, making it a practical choice for harder alloy steels, tool steels, and stainless grades where carbide is not required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt high-speed steel construction for superior heat and wear resistance\u003c\/li\u003e\n\u003cli\u003e12 mm diameter with 12 mm shank for direct collet or end mill holder mounting\u003c\/li\u003e\n\u003cli\u003e53 mm length of cut provides reach for deeper pocketing and slotting operations\u003c\/li\u003e\n\u003cli\u003eFour right-hand flutes with fine pitch for controlled chip load during heavy roughing\u003c\/li\u003e\n\u003cli\u003eCenter-cutting design permits plunge milling without a pre-drilled entry hole\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish compatible with cutting fluid or dry machining setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard 12 mm shank roughing end mill compatible with collet chucks, Weldon-style end mill holders, and hydraulic holders sized for 12 mm shanks used in CNC and manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom professional. Power down and lock out the spindle before inserting or removing the end mill from the holder. Ensure the shank is fully seated to the minimum insertion depth required by the holder and that all set screws or collet nuts are torqued according to the toolholder manufacturer's specifications. Inspect the cutting edges for chips or damage before each use, and verify spindle RPM and feed rate match the calculated values for the workpiece material and diameter.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 12 mm (0.4724 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 12 mm (0.4724 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 53 mm (2.0866 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 110 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt (M42 HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M42\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitch\u003c\/strong\u003e: Fine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Single End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.504 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: 91197574\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51747641786674,"sku":"91197574","price":167.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f4fec724bb21609a68c0dab36612eba9.jpg?v=1788883953","url":"https:\/\/voomisupply.com\/products\/hertel-91197574-roughing-end-mill-12mm-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}