{"product_id":"iscar-t4120er54420x-1-1-4in-dia-4-flute-carbide-roughing-end-mill","title":"Iscar T4120ER54420X 1-1\/4in dia 6-Flute M42  Roughing End Mill","description":"\u003cp\u003eThe Iscar T4120ER54420X is a new, steel roughing end mill from Iscar's MULTI-MASTER and solid end mill line, carrying the ER54420 grade designation — a steel substrate with an X-coating (Iscar's TiAlN-based PVD multilayer coating) engineered for aggressive material removal in steels, alloy steels, and cast irons. The part number decodes as follows: \"T4\" = 4-flute configuration; \"120\" = 1-1\/4 in (approximately 31.75 mm) cutting diameter; \"ER5\" = roughing (chip-splitter) geometry with extended reach\/long length; \"4420\" = length-of-cut 4 in, overall length 6 in (consistent with Iscar's published dimensional standards for this series); \"X\" = Iscar's X-coating (TiAlN multilayer PVD). The wavy, chip-splitting serrated flute profile (visually confirmed in photos) divides the cutting edge into segments that reduce cutting forces and vibration, enabling heavy axial and radial depths of cut in steels; it accepts standard straight-shank toolholders with 1-1\/4 in bore, including ER, side-lock, and shrink-fit holders. This end mill is supplied new in original Iscar plastic case with intact packaging (confirmed by photos of sealed case with ISCAR label, ISCAR part number T4120ER54420X, grade ER54420, and PM200 production designation). Product Specifications MPN T4120ER54420X Brand Iscar Number Of Flutes 4 Grade ER54420 Coating X-Coating (TiAlN multilayer PVD) Cutting Diameter 1-1\/4 in (31.75 mm) Shank Diameter 1-1\/4 in (31.75 mm) Cutting Geometry Roughing \/ chip-splitter serrated flute Material Steel Length of Cut (LOC) 4 in Overall Length (OAL) 6 in End Type Square end Helix Angle 35° (nominal) Compatible Materials Steel, alloy steel, cast iron\u003c\/p\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin-top:16px;\"\u003e\n\u003ctr style=\"background:#56555b;\"\u003e\u003cth style=\"text-align:left;padding:8px 12px;color:#fff;font-size:13px;\" colspan=\"2\"\u003eProduct Specifications\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eCompatible Materials\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eNumber Of Flutes\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eHelix Angle\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003e35° (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eLength of Cut (LOC)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003e4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eMPN\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003eT4120ER54420X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eGrade\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003eER54420\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003eTool Steal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eShank Diameter\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003e1-1\/4 in (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003eIscar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eEnd Type\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003eSquare end\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eCutting Geometry\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003eRoughing \/ chip-splitter serrated flute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eOverall Length (OAL)\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003e6 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eCoating\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003eX-Coating (TiAlN multilayer PVD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;font-weight:600;color:#333;border-bottom:1px solid #eee;width:40%;\"\u003eCutting Diameter\u003c\/td\u003e\n\u003ctd style=\"padding:6px 12px;font-size:13px;color:#555;border-bottom:1px solid #eee;\"\u003e1-1\/4 in (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"DDT2 (Cutters)","offers":[{"title":"Default Title","offer_id":49442154152151,"sku":"1530p658","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/0626\/7095\/files\/iscar-t4120er54420x-roughing-end-mill-1.jpg?v=1784132378","url":"https:\/\/dansdiscounttools.com\/products\/iscar-t4120er54420x-1-1-4in-dia-4-flute-carbide-roughing-end-mill","provider":"Dan's Discount Tools","version":"1.0","type":"link"}