{"product_id":"osg-5414100-square-end-mill-7-8-in-4-flute-cobalt","title":"Osg 5414100 Square End Mill 7\/8 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5414100 is a square-end, single-end cobalt end mill designed for milling ferrous and difficult-to-machine materials in machining centers and manual mills. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance that standard HSS tooling cannot match. The cutter runs a 7\/8 inch diameter with a 1-7\/8 inch length of cut, a matching 7\/8 inch straight shank, and a 4-1\/8 inch overall length. Four spiral flutes at a 30-degree helix angle promote efficient chip evacuation and smooth cutting action. The centercutting geometry allows direct plunge entry into the workpiece without a pre-drilled hole.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for slotting, profiling, and plunge operations in job shops, tool rooms, and production machining environments. The uncoated M42 cobalt construction makes it a practical choice for stainless steel, alloy steel, cast iron, and other tough materials where heat buildup shortens tool life. It belongs to OSG Series 541, a regular-length line designed for general-purpose metalworking. The right-hand cut and right-hand flute configuration matches the standard spindle rotation of most vertical and horizontal machining centers.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt high-speed steel construction for elevated heat and wear resistance\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge milling without pilot drilling\u003c\/li\u003e\n\u003cli\u003e30-degree helix spiral flutes promote smooth chip flow and reduce cutting forces\u003c\/li\u003e\n\u003cli\u003eUncoated finish — suitable for re-sharpening and use with cutting fluids\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, right-hand flute for standard spindle compatibility\u003c\/li\u003e\n\u003cli\u003eRegular-length Series 541 geometry for general-purpose slotting and profiling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose replacement or standard tooling selection for machining centers and manual mills accepting a 7\/8 inch straight shank; belongs to OSG Series 541.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or CNC operator. Seat the shank fully in a properly sized collet or end mill holder and torque the retention mechanism to the holder manufacturer's specification. Verify runout with a dial indicator before cutting. Power down and lock out the spindle drive before changing tooling, and follow applicable shop safety procedures for rotating cutting tools.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 7\/8 inch (0.875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1-7\/8 inches (1.875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 7\/8 inch (0.875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4-1\/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\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt (M42 HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 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 Type\u003c\/strong\u003e: Square, Single End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Helix\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\u003eSeries\u003c\/strong\u003e: 541\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5414100\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51748802068786,"sku":"5414100","price":145.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5b6c496d0bb338392bacf9079246a8b8.jpg?v=1788898619","url":"https:\/\/voomisupply.com\/products\/osg-5414100-square-end-mill-7-8-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}