{"product_id":"osg-20552503-corner-radius-end-mill-1-4-in-5-flute-carbide","title":"Osg 20552503 Corner Radius End Mill 1\/4 in 5 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 20552503 is a single-end corner radius end mill ground from ultra-fine micrograin solid carbide and coated with OSG EXO TiAlN via PVD process. It carries a 1\/4 inch cutting diameter, a 0.06 inch corner radius, and five variable-helix flutes configured for right-hand cut and right-hand flute direction. The variable helix and variable index geometry reduce harmonic vibration during aggressive cuts, making this tool well-suited for both roughing and finishing passes in a single setup. Overall length is 2.5 inches with a 5\/8 inch length of cut.\u003c\/p\u003e\n\u003cp\u003eThis end mill is engineered for demanding workpiece materials including stainless steel, superalloys, and titanium, as well as hardened stock. The 1\/4 inch straight cylindrical shank mounts directly into a standard toolholder. It is a regular-length tool designed for CNC machining centers and manual mills where tight corner radii and edge integrity are required. The centercutting design allows plunge entry. No coolant-through feature is present, so flood or mist coolant delivery from the spindle side is the standard approach for these materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eUltra-fine micrograin solid carbide substrate for edge strength and wear resistance in hard materials\u003c\/li\u003e\n  \u003cli\u003eEXO TiAlN PVD coating provides high heat resistance during dry and semi-dry cutting of stainless and superalloys\u003c\/li\u003e\n  \u003cli\u003eVariable helix and variable index geometry suppress chatter and extend tool life in difficult-to-machine materials\u003c\/li\u003e\n  \u003cli\u003e0.06 inch corner radius protects the cutting edge and improves surface finish at part corners\u003c\/li\u003e\n  \u003cli\u003eFive-flute configuration increases feed rate capability versus standard four-flute tooling at equivalent chip load\u003c\/li\u003e\n  \u003cli\u003eCentercutting design permits direct plunge milling without a pre-drilled pilot\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard straight-bore toolholders accepting a 1\/4 inch cylindrical shank. Mill diameter tolerance is 0.0000 to -0.0020 inches; shank diameter tolerance is h6. Intended for use on CNC machining centers cutting stainless steel, superalloys, titanium, and hard materials per OSG Series 2055 application guidelines.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and tool changes must be performed with the machine spindle fully stopped and the control in an estop or tool-change state. Confirm toolholder bore and collet size match the 1\/4 inch h6 shank before mounting. Verify runout at the toolholder after tightening, as excessive runout accelerates edge wear on fine-grain carbide. Consult the machine tool builder and OSG cutting data recommendations for speeds, feeds, and depth of cut before first use in hardened or superalloy workpieces.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.06 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 5\/8 inch (0.6250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide, Ultra Fine Micrograin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: EXO TiAlN (PVD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Style\u003c\/strong\u003e: Variable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting 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\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Stainless Steel, Superalloys and Titanium, Hard Material\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: 0.0000 to -0.0020 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: h6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 2055\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 20552503\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51748541333810,"sku":"20552503","price":96.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8e83e32889be60ff16e5c8e0e657c9b3.jpg?v=1788895057","url":"https:\/\/voomisupply.com\/products\/osg-20552503-corner-radius-end-mill-1-4-in-5-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}