{"product_id":"promax-109-01646-square-end-mill-1-4-in-3-flute-solid-carbide-zrn","title":"Promax 109-01646 Square End Mill 1\/4 in 3-flute Solid Carbide Zrn","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PROMAX 109-01646 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. With a 0.25 inch cutting diameter, a 1.5 inch length of cut, and a 3.5 inch overall length, this tool delivers rigid performance in a compact profile. The 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces. A zirconium nitride (ZrN) finish increases surface hardness and wear resistance, extending tool life in demanding cuts. This end mill is part of PROMAX Series 109 and is suited for use by machinists and tooling professionals working in job shops, production facilities, and maintenance environments.\u003c\/p\u003e\n\u003cp\u003eThis end mill is intended for milling ferrous and non-ferrous materials where a right-hand cut, right-hand spiral flute configuration is required. The centercutting geometry allows plunge milling in addition to peripheral and slot cutting. With a micrograin carbide substrate, it handles applications requiring tight dimensional tolerances and consistent finish quality. Typical use cases include slot milling, profiling, and shoulder milling on CNC machining centers and manual mills. The 0.25 inch shank diameter fits standard ER and end mill collet holders commonly found in both vertical and horizontal machining setups.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid micrograin carbide construction for high rigidity and wear resistance\u003c\/li\u003e\n  \u003cli\u003eZrN coating increases hardness and extends tool life in abrasive materials\u003c\/li\u003e\n  \u003cli\u003e40-degree helix angle promotes smooth chip flow and reduces cutting heat\u003c\/li\u003e\n  \u003cli\u003eCentercutting design enables direct plunge entry without pre-drilling\u003c\/li\u003e\n  \u003cli\u003e3-flute spiral geometry balances chip clearance and cutting edge strength\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand flute configuration compatible with standard spindle rotation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct tooling selection for CNC machining centers and manual mills using 0.25 inch collet or end mill holders. Part of PROMAX Series 109.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or tool holder and torque the retention nut to the tool holder specification. Verify runout with a dial indicator before beginning cuts, as excessive runout accelerates edge wear and reduces dimensional accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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\u003eCentercutting\u003c\/strong\u003e: Yes\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\u003eFinish\u003c\/strong\u003e: ZrN (Zirconium Nitride)\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  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 109\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: PROMAX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 109-01646\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PROMAX","offers":[{"title":"Default Title","offer_id":52002112045362,"sku":"109-01646","price":83.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/640d99b310f138fcc251ebb18da80efc_f7f197c1-6b60-4de6-8636-a4fa5949f4bc.jpg?v=1789997770","url":"https:\/\/voomisupply.com\/products\/promax-109-01646-square-end-mill-1-4-in-3-flute-solid-carbide-zrn","provider":"Voomi Supply","version":"1.0","type":"link"}