{"product_id":"hertel-e199921279-square-end-mill-25-64-in-2-flute-hss","title":"Hertel E199921279 Square End Mill 25\/64 in 2 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E199921279 is a single-end, square-profile end mill manufactured from high speed steel (HSS) and designed for general-purpose milling operations in machine shop and production environments. The cutter measures 0.3906 inches (25\/64 inches) in diameter with a 13\/16-inch length of cut and a 2-11\/16-inch overall length. Two right-hand spiral flutes at a 30-degree helix angle provide efficient chip evacuation and a balanced cut. The bright, uncoated finish makes it straightforward to inspect for wear. This tool is installed and operated by machinists, tool-and-die makers, and CNC setup technicians working on mills, machining centers, and manual knee mills.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for slotting, profiling, and peripheral milling in ferrous and non-ferrous materials where an HSS cutter is appropriate. The centercutting geometry allows the tool to plunge directly into a workpiece, making it effective for cavity work and pocketing operations. The 3\/8-inch shank diameter fits standard ER collets, end mill holders, and Weldon-style tool holders commonly found in light-to-medium duty machining setups. It is a practical choice for short-run jobs, tool room work, and situations where carbide tooling is not required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e25\/64-inch (0.3906 inches) cutting diameter with square end profile\u003c\/li\u003e\n\u003cli\u003e2 right-hand spiral flutes with 30-degree helix angle for efficient chip flow\u003c\/li\u003e\n\u003cli\u003eCentercutting design supports direct plunge entry\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction — suitable for a broad range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eBright\/uncoated finish for easy visual wear inspection\u003c\/li\u003e\n\u003cli\u003eSingle-end configuration; 3\/8-inch shank fits standard collet and end mill holders\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard single-end square end mill with a 3\/8-inch shank diameter, compatible with ER collets, Weldon-style end mill holders, and other 3\/8-inch bore toolholding systems used on vertical and horizontal milling machines and CNC machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully powered down and locked out before mounting or removing the tool. Verify collet or holder bore size matches the 3\/8-inch shank before tightening; proper tool stick-out should be minimized to reduce deflection. Confirm spindle rotation direction is set to right-hand before engaging the cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 25\/64 inches (0.3906 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 13\/16 inches (0.8125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-11\/16 inches (2.6875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inches (0.375 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\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\u003eEnd Mill Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration\u003c\/strong\u003e: Single End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112803\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: E199921279\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51732508016946,"sku":"E199921279","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/72adae714235217efca02cbd761d380d.jpg?v=1788743756","url":"https:\/\/voomisupply.com\/products\/hertel-e199921279-square-end-mill-25-64-in-2-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}