{"product_id":"accupro-12181650-square-end-mill-21-64-in-2-flute-carbide","title":"Accupro 12181650 Square End Mill 21\/64 in 2 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12181650 is a solid carbide square end mill designed for precision milling in metal fabrication and machining applications. Built from micrograin carbide, this two-flute end mill measures 0.3281 inches (21\/64 inch) in cutting diameter with a 40-degree helix angle and spiral flute geometry. The stub-length configuration keeps the tool rigid, reducing deflection during aggressive cuts. It is centercutting, allowing plunge entry directly into the workpiece. Right-hand cut and right-hand flute orientation make it compatible with standard CNC and manual milling setups. Machinists and tool-and-die professionals are the primary installers of this type of tooling.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for slot milling, profiling, and peripheral milling in ferrous and non-ferrous materials. The uncoated micrograin carbide construction performs well in aluminum, brass, copper, and softer steels where a coating is not required or where regrinding is anticipated. The stub overall length of 2 inches keeps the tool compact for tight-clearance work on vertical machining centers, knee mills, and CNC routers. The 3\/8-inch shank diameter fits standard ER collets and end mill holders commonly found in job shop and production environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMicrograin solid carbide construction for hardness and edge retention\u003c\/li\u003e\n\u003cli\u003e40-degree helix angle promotes smooth chip evacuation and reduced cutting forces\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge milling into the workpiece\u003c\/li\u003e\n\u003cli\u003eStub length overall at 2 inches provides added rigidity and reduced deflection\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute for compatibility with standard spindle rotation\u003c\/li\u003e\n\u003cli\u003eUncoated finish suitable for applications where regrinding is planned\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard-shank square end mill for use in ER collet chucks, end mill holders, and shrink-fit tooling systems accepting a 3\/8-inch shank diameter on CNC machining centers, manual knee mills, and similar milling equipment.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before mounting or removing the end mill. Secure the shank to the full recommended engagement depth in the holder to prevent pullout under cutting loads. Verify runout at the cutting diameter before initiating a program, as excessive runout accelerates tool wear and degrades surface finish.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 21\/64 inch (0.3281 inches)\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\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 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: 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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Micrograin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Stub\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\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\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000 \/ -0.002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 \/ -0.0004 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 12181650\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51738552271154,"sku":"12181650","price":40.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b082d7d1f2a4950638ca90b0ff1d2ad8.jpg?v=1788800936","url":"https:\/\/voomisupply.com\/products\/accupro-12181650-square-end-mill-21-64-in-2-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}