{"product_id":"helical-solutions-81925-ball-end-mill-0-25-in-6-flute-carbide","title":"Helical Solutions 81925 Ball End Mill 0.25 in 6 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELICAL SOLUTIONS 81925 is a 6-flute solid carbide ball end mill designed for demanding material removal in stainless steel, high-temperature alloys, and hardened materials. Built on the HEV-6 series platform, it features a variable index geometry that reduces harmonic vibration and improves surface finish across both roughing and finishing passes. The 0.2500-inch diameter pairs with a 0.5000-inch length of cut and a Tplus PVD coating engineered to sustain cutting-edge integrity at elevated temperatures. This tool is sized for precision work in tight-tolerance applications where a standard 4-flute ball mill would underperform on harder workpiece materials.\u003c\/p\u003e\n\u003cp\u003eThe 81925 is suited for CNC machining centers running stainless steel grades, nickel-based superalloys, titanium, and hardened steels. Its 0.1250-inch nose radius and right-hand spiral flute geometry support consistent chip evacuation in deep-pocket and contour-milling operations. Secondary workpiece compatibility extends to carbon steel and cast iron, making this a versatile tool for shops that run mixed-material programs. The straight cylindrical shank fits standard ER and side-lock toolholders at the 0.2500-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eVariable index flute spacing reduces chatter and harmonics during high-feed passes\u003c\/li\u003e\n  \u003cli\u003eTplus PVD coating provides heat and wear resistance for stainless steel and high-temp alloy cutting\u003c\/li\u003e\n  \u003cli\u003e6-flute configuration increases chip load per tooth and improves material removal rates on harder materials\u003c\/li\u003e\n  \u003cli\u003e37-degree helix angle promotes smooth cutting action and efficient chip flow\u003c\/li\u003e\n  \u003cli\u003eCenter-cutting geometry allows plunge entry without a pre-drilled pilot hole\u003c\/li\u003e\n  \u003cli\u003eSingle-end, right-hand cut with a straight cylindrical shank for broad toolholder compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CNC machining applications with primary workpiece materials of stainless steel, high-temperature alloys, and hardened materials (material codes M, S, H) and secondary compatibility with steel and cast iron (material codes P, K). Fits standard 0.2500-inch bore ER collets and side-lock holders.\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 a safe state. Verify runout does not exceed the 0.0005-inch maximum TIR specification after seating in the toolholder, as excess runout accelerates edge wear on carbide tools. A licensed machinist or qualified CNC operator should confirm speeds, feeds, and depth-of-cut parameters using the applicable material and coating guidelines before production runs. Handle carbide end mills carefully to avoid chipping the cutting edges during storage and changeover.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.2500 inches (1\/4 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.5000 inches (1\/2 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5000 inches (2-1\/2 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2500 inches (1\/4 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNose Radius\u003c\/strong\u003e: 0.1250 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 37 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Tplus (PVD)\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\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCenter Cutting\u003c\/strong\u003e: Yes\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 Removal Type\u003c\/strong\u003e: Roughing and Finishing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.0000 \/ -0.0020 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: +0.0620 \/ -0.0620 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: h6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum TIR\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HEV-6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Stainless Steel, High-Temp Alloy, Hardened Materials\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Workpiece Materials\u003c\/strong\u003e: Steel, Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 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: HELICAL SOLUTIONS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 81925\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELICAL SOLUTIONS","offers":[{"title":"Default Title","offer_id":51735160717618,"sku":"81925","price":92.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f060fe1ca172945c2992551bcee23694_e3d5f065-1f3e-4832-a9ee-3afc9e2786ff.jpg?v=1788769956","url":"https:\/\/voomisupply.com\/products\/helical-solutions-81925-ball-end-mill-0-25-in-6-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}