{"product_id":"accupro-12182861-square-end-mill-21-64-in-4-flute-carbide","title":"Accupro 12182861 Square End Mill 21\/64 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 12182861 is a solid carbide square end mill designed for precision milling operations in metal, alloy, and composite workpiece materials. Built from micrograin carbide stock, it delivers the edge retention and rigidity required for demanding cutting conditions. The 21\/64 inch (0.3281 inch) cutting diameter pairs with a 4-flute, 40-degree helix spiral configuration to promote smooth chip evacuation and stable cuts. An AlTiN coating increases surface hardness and heat resistance, extending tool life in high-speed and dry cutting applications. This is a stub-length, centercutting end mill, meaning it can plunge directly into material without a pre-drilled entry point. Machinists, toolroom operators, and CNC setup technicians use this tool in vertical and horizontal milling setups.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for slot milling, profiling, and plunging operations across general-purpose and precision machining environments, including job shops, maintenance facilities, and production floors. Its 5\/8 inch length of cut and 3\/8 inch shank diameter make it appropriate for short-reach applications where rigidity and runout control are priorities. The stub-length design reduces deflection during aggressive lateral cuts. Right-hand cut and right-hand flute orientation are standard for conventional spindle configurations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid micrograin carbide construction for superior edge retention and wear resistance\u003c\/li\u003e\n  \u003cli\u003eAlTiN coating provides high-temperature hardness and oxidation resistance for dry or high-speed cutting\u003c\/li\u003e\n  \u003cli\u003e40-degree helix spiral flute promotes efficient chip evacuation and reduces cutting forces\u003c\/li\u003e\n  \u003cli\u003eCentercutting design allows direct plunge entry without pre-drilling\u003c\/li\u003e\n  \u003cli\u003eStub-length configuration minimizes deflection in short-reach milling applications\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand flute for standard spindle compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in milling machines and CNC machining centers with ER or equivalent collet systems accepting a 3\/8 inch shank diameter. Suitable for general-purpose square shoulder and slot milling in steels, alloys, and similar materials where an AlTiN-coated carbide end mill is specified.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or CNC operators. Ensure the spindle is fully stopped and machine is in a safe state before inserting or removing the tool from the collet or chuck. Verify runout at the cutting diameter after tool installation and before engaging the workpiece. Do not exceed the rated depth of cut or axial engagement for the tool diameter, and consult the appropriate feeds-and-speeds reference for the specific workpiece material and machine capability.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 21\/64 inch (0.3281 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 5\/8 inch (0.6250 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 40 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide (Micrograin)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN\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\u003eLength Type\u003c\/strong\u003e: Stub\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000 \/ -0.002 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 \/ -0.0004 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.12 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: ACCUPRO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 12182861\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51740499214642,"sku":"12182861","price":52.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/29d72373dcd6fd5304f2a3284942293a.jpg?v=1788825431","url":"https:\/\/voomisupply.com\/products\/accupro-12182861-square-end-mill-21-64-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}