{"product_id":"value-collection-20550-14-square-end-mill-7-8-in-4-flute-hss","title":"Value Collection -20550-14 Square End Mill 7\/8 in 4 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION -20550-14 is a single-end square end mill designed for precision milling operations in ferrous and non-ferrous materials. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, it provides improved wear resistance and extended tool life compared to uncoated HSS tooling. The 7\/8 inch cutting diameter pairs with a 4-flute, right-hand spiral configuration and a 30-degree helix angle, supporting efficient chip evacuation and smooth surface finishes. The end mill is centercutting, allowing plunge entry into workpieces. Machinists and tool-and-die professionals use this style of end mill on manual knee mills, CNC machining centers, and bridgeport-style machines.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for slotting, profiling, and peripheral milling operations in shop and production environments. The 1-7\/8 inch length of cut accommodates moderate-depth passes, while the 3\/4 inch shank diameter provides rigid coupling to standard R8, ER, or side-lock tool holders. The 4-1\/8 inch overall length is compatible with typical spindle clearances on vertical milling machines. No chipbreaker geometry is present, making this tool appropriate for continuous-cut finishing and semi-finishing passes rather than heavy roughing.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e7\/8 inch cutting diameter with 1-7\/8 inch length of cut for moderate-depth milling\u003c\/li\u003e\n\u003cli\u003eHigh speed steel construction with titanium nitride (TiN) coating for improved wear resistance\u003c\/li\u003e\n\u003cli\u003e4-flute, right-hand cut and right-hand spiral with 30-degree helix angle for efficient chip flow\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge entry without pre-drilling\u003c\/li\u003e\n\u003cli\u003e3\/4 inch shank diameter fits standard milling tool holders\u003c\/li\u003e\n\u003cli\u003eSingle-end configuration; no chipbreaker, variable helix, or variable index geometry\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard single-end square end mill for use with conventional and CNC vertical milling machines accepting a 3\/4 inch shank. Compatible with R8 collets, ER collet chucks, and side-lock end mill holders sized for 3\/4 inch shanks.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following standard toolroom practices. Ensure the machine spindle is fully stopped and the power is locked out before mounting or removing the end mill. Seat the shank fully into the tool holder to the minimum recommended engagement depth to avoid deflection or pullout under cutting load. Verify runout with a dial indicator before beginning production cuts; excessive runout accelerates flute 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: 7\/8 inch (0.875 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: High Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Titanium Nitride (TiN)\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: 3\/4 inch (0.75 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4-1\/8 inches (4.125 inches)\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\u003eSingle or Double End\u003c\/strong\u003e: Single End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\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\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VALUE COLLECTION\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: -20550-14\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51690493772082,"sku":"-20550-14","price":83.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4ee7756be047e47c35d5617b3aaf587e.jpg?v=1788270513","url":"https:\/\/voomisupply.com\/products\/value-collection-20550-14-square-end-mill-7-8-in-4-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}