{"product_id":"helical-solutions-52137-square-end-mill-4-flute-0-25-in","title":"Helical Solutions 52137 Square End Mill 4 Flute 0.25 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELICAL SOLUTIONS 52137 is a 4-flute solid carbide square end mill designed for high-performance milling in steel and ferrous alloys. It features a variable index (unequal flute spacing) geometry that reduces harmonic chatter during aggressive cuts, improving surface finish and tool life. The APLUS coating adds lubricity and heat resistance for extended performance in steel applications. With a 0.25-inch mill diameter and a 0.375-inch length of cut, this end mill is suited for finishing and light-to-medium roughing passes where precision and tool stability are critical. Licensed machinists and CNC programmers working in job shops, aerospace, and general manufacturing will recognize this as a purpose-built steel-cutting tool.\u003c\/p\u003e\n\u003cp\u003eThis end mill is built for steel milling applications in CNC machining centers and manual mills. The reduced neck geometry provides extended reach of 2.125 inches beyond the shank, allowing access to deep pockets and stepped features without a full-length reach tool. The straight-cylindrical shank at 0.25 inches seats directly in standard ER collets, end mill holders, or hydraulic chucks. It is centercutting, enabling plunge entry as well as conventional ramping and helical interpolation strategies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eVariable index flute spacing reduces chatter and improves stability at higher feed rates\u003c\/li\u003e\n  \u003cli\u003eAPLUS coating provides enhanced lubricity and thermal resistance for steel cutting\u003c\/li\u003e\n  \u003cli\u003eReduced neck design delivers 2.125 inches of reach for deep-pocket and stepped-feature work\u003c\/li\u003e\n  \u003cli\u003eCentercutting geometry supports plunge milling, ramping, and helical entry\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand helical flutes match standard CNC spindle rotation\u003c\/li\u003e\n  \u003cli\u003eSolid carbide construction maintains rigidity and edge integrity at elevated cutting temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003ePart of the HELICAL SOLUTIONS End Mills for Steels series: 4 Flute, Square, Variable Pitch, Reduced Neck. Designed for use in CNC machining centers with standard 0.25-inch collet or end mill holder tooling.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the straight shank fully into the collet or holder to the recommended gauge depth and torque the retention nut to the tool holder manufacturer's specification. Verify runout with a dial indicator before beginning a production cut, as excessive runout will reduce tool life significantly on carbide end mills.\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\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.375 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: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 2.125 inches\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\/Finish\u003c\/strong\u003e: APLUS\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: Helical\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\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.093 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: 52137\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELICAL SOLUTIONS","offers":[{"title":"Default Title","offer_id":51737172574514,"sku":"52137","price":86.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5345d5b916951dad2cecc34bcce78c4d.jpg?v=1788785222","url":"https:\/\/voomisupply.com\/products\/helical-solutions-52137-square-end-mill-4-flute-0-25-in","provider":"Voomi Supply","version":"1.0","type":"link"}