{"product_id":"accupro-12179261-ball-end-mill-0-3281-in-4-flute-carbide","title":"Accupro 12179261 Ball End Mill 0.3281 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 12179261 is a solid carbide ball end mill designed for precision milling operations in metal cutting and finishing applications. Built from micrograin solid carbide, this single-end tool features a 0.3281-inch (21\/64 inch) cutting diameter with a 0.625-inch length of cut and an overall length of 2 inches. The 4-flute, right-hand spiral geometry paired with a 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. The nACRo coating adds heat and wear resistance, extending tool life in demanding materials. Machinists and tool-and-die professionals rely on this geometry for contoured surfaces, slots, and complex 3D profiles.\u003c\/p\u003e\n\u003cp\u003eThis ball end mill is suited for use on CNC machining centers and manual mills in job shop, production, and tool room environments. Its 3\/8-inch shank diameter fits standard collet chucks and end mill holders common in both vertical and horizontal machining setups. The 40-degree helix and nACRo coating make it particularly effective in harder alloys, stainless steels, and abrasive materials where tool life and surface finish are priorities. Extended reach is not featured on this tool, so it is best applied in standard-depth pockets and contour work where rigidity is maximized.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMicrograin solid carbide construction for rigidity and edge retention\u003c\/li\u003e\n  \u003cli\u003enACRo coating provides wear resistance and heat protection in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003e4-flute, right-hand spiral design promotes smooth cutting and chip removal\u003c\/li\u003e\n  \u003cli\u003e40-degree helix angle improves cutting efficiency and surface finish\u003c\/li\u003e\n  \u003cli\u003eBall end geometry enables 3D contouring, radii, and blended surface work\u003c\/li\u003e\n  \u003cli\u003eMill diameter tolerance of +0.000 to -0.002 inches ensures consistent fit and finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit solid carbide ball end mill for standard 3\/8-inch collet chucks and end mill holders used on CNC and manual milling machines.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist following shop safety protocols. Secure the shank fully into a clean, properly sized collet or end mill holder and torque to the holder manufacturer specification. Verify runout at the tool tip before commencing cuts. Inspect the cutting edges for chips or wear before each use, and never exceed the tool manufacturer recommended depth of cut for the workpiece material.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.3281 inches (21\/64 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.625 inches (5\/8 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches (3\/8 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\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\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 Type\u003c\/strong\u003e: Single End\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Micrograin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: nACRo\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000 to -0.002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0004 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 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: 12179261\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51737141248306,"sku":"12179261","price":77.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ee82fc6eb7f8370f036a4008b5538dc4_73402111-726e-4167-a7f1-975178aca1a6.jpg?v=1788784876","url":"https:\/\/voomisupply.com\/products\/accupro-12179261-ball-end-mill-0-3281-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}