{"id":2061,"date":"2026-01-08T14:02:47","date_gmt":"2026-01-08T14:02:47","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&#038;p=2061"},"modified":"2026-09-24T11:33:01","modified_gmt":"2026-09-24T11:33:01","slug":"hrc55-4-flute-long-neck-solid-carbide-square-end-mill","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/ko\/%ec%a0%9c%ed%92%88\/hrc55-4-flute-long-neck-solid-carbide-square-end-mill\/","title":{"rendered":"HRC55 4-Flute Long Neck Solid Carbide Square End Mill for Steel"},"content":{"rendered":"<div class=\"hy-tab-wrap hy-overview-final\" style=\"width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 16px; background: #ffffff;\">\n<p><!-- SECTION 1 \u2014 OVERVIEW --><\/p>\n<section class=\"hy-tab-section\">\n<h2 class=\"hy-tab-main-title\">4-Flute Long Neck Carbide Square End Mill<\/h2>\n<p class=\"hy-tab-intro\">This 4-flute solid carbide long-neck square end mill is designed for precision machining in recessed areas, deep cavities, narrow grooves and rib features where a standard-length tool cannot reach. The reduced-neck construction provides additional clearance from the workpiece wall, while the square-end profile and four cutting edges support light side milling, profiling and finishing in carbon steel, alloy steel, mold steel and confirmed pre-hardened steel within the HRC55 series range.<\/p>\n<div style=\"display: flex; flex-wrap: wrap; width: 100%; margin: 20px 0 0; padding: 0; border: 1px solid #dbe3ec; border-top: 3px solid #2146B5; background: #f8fafc; box-sizing: border-box;\">\n<div style=\"flex: 1 1 140px; min-width: 0; padding: 12px 14px; border-right: 1px solid #dbe3ec;\"><small style=\"display: block; color: #64748b; font-weight: bold;\">END PROFILE<\/small><strong>Square \/ Flat End<\/strong><\/div>\n<div style=\"flex: 1 1 140px; min-width: 0; padding: 12px 14px; border-right: 1px solid #dbe3ec;\"><small style=\"display: block; color: #64748b; font-weight: bold;\">FLUTES<\/small><strong>\ud50c\ub8e8\ud2b8 4\uac1c<\/strong><\/div>\n<div style=\"flex: 1 1 140px; min-width: 0; padding: 12px 14px; border-right: 1px solid #dbe3ec;\"><small style=\"display: block; color: #64748b; font-weight: bold;\">DIAMETER RANGE<\/small><strong>\u00d81\u2013\u00d83 mm<\/strong><\/div>\n<div style=\"flex: 1 1 140px; min-width: 0; padding: 12px 14px;\"><small style=\"display: block; color: #64748b; font-weight: bold;\">APPLICATION<\/small><strong>Up to HRC55*<\/strong><\/div>\n<\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Long-Neck Access for Recessed Features<\/h3>\n<div style=\"width: 100%; max-width: 900px; margin: 0 auto;\"><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Micro-Carbide-End-Mill-Rib-Processing-Cutter-2_\u526f\u672c.webp\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"HRC55 four-flute long-neck carbide square end mill for recessed machining\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Micro-Carbide-End-Mill-Rib-Processing-Cutter-2_\u526f\u672c.webp\" alt=\"HRC55 four-flute long-neck carbide square end mill for recessed machining\" title=\"\"><\/noscript><\/div>\n<div class=\"hy-note\" style=\"margin-top: 14px; padding: 14px 18px; background: #f8fafc; border-left: 3px solid #2146B5;\"><strong>Geometry Note:<\/strong> Effective neck length provides access and clearance; it is not the same as cutting-edge length or the recommended axial depth of cut.<\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">\uc8fc\uc694 \uae30\ub2a5<\/h3>\n<div style=\"display: flex; flex-wrap: wrap; gap: 14px; width: 100%;\">\n<div class=\"hy-tab-card\" style=\"flex: 1 1 210px; min-width: 0; padding: 16px; border: 1px solid #e2e8f0; border-top: 3px solid #2146B5;\">\n<h4 class=\"hy-card-title\">Extended Neck Reach<\/h4>\n<p class=\"hy-card-text\">Provides access to deep pockets, recessed walls and narrow rib features.<\/p>\n<\/div>\n<div class=\"hy-tab-card\" style=\"flex: 1 1 210px; min-width: 0; padding: 16px; border: 1px solid #e2e8f0; border-top: 3px solid #2146B5;\">\n<h4 class=\"hy-card-title\">Reduced-Neck Clearance<\/h4>\n<p class=\"hy-card-text\">Helps reduce interference between the tool shank, holder and workpiece wall.<\/p>\n<\/div>\n<div class=\"hy-tab-card\" style=\"flex: 1 1 210px; min-width: 0; padding: 16px; border: 1px solid #e2e8f0; border-top: 3px solid #2146B5;\">\n<h4 class=\"hy-card-title\">Four-Flute Stability<\/h4>\n<p class=\"hy-card-text\">Supports regular tooth engagement during light side milling and finishing.<\/p>\n<\/div>\n<div class=\"hy-tab-card\" style=\"flex: 1 1 210px; min-width: 0; padding: 16px; border: 1px solid #e2e8f0; border-top: 3px solid #2146B5;\">\n<h4 class=\"hy-card-title\">Square-End Precision<\/h4>\n<p class=\"hy-card-text\">Supports flat-bottom finishing, straight walls and defined square profiles.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Product Details<\/h3>\n<div style=\"display: flex; flex-direction: column; gap: 18px; width: 100%; max-width: 900px; margin: 0 auto;\"><img data-srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools.png 870w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools-300x285.png 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools-768x729.png 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools-13x12.png 13w\" decoding=\"async\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools.png\" class=\"aligncenter wp-image-8254 size-full lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"long neck end mill square type hy cutting tools\"   title=\"\"  sizes=\"(max-width: 870px) 100vw, 870px\" \/><noscript><img decoding=\"async\" class=\"aligncenter wp-image-8254 size-full\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools.png\" alt=\"long neck end mill square type hy cutting tools\" width=\"870\" height=\"826\" title=\"\" srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools.png 870w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools-300x285.png 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools-768x729.png 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-square-type-hy-cutting-tools-13x12.png 13w\" sizes=\"(max-width: 870px) 100vw, 870px\" \/><\/noscript><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Micro-Carbide-End-Mill-Rib-Processing-Cutter-3_\u526f\u672c.webp\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Reduced-neck geometry of long-neck carbide end mill\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Micro-Carbide-End-Mill-Rib-Processing-Cutter-3_\u526f\u672c.webp\" alt=\"Reduced-neck geometry of long-neck carbide end mill\" title=\"\"><\/noscript><br \/>\n<img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Micro-Carbide-End-Mill-Rib-Processing-Cutter-4_\u526f\u672c.webp\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Four-flute square-end geometry for precision rib machining\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Micro-Carbide-End-Mill-Rib-Processing-Cutter-4_\u526f\u672c.webp\" alt=\"Four-flute square-end geometry for precision rib machining\" title=\"\"><\/noscript><\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">\uad8c\uc7a5 \uc560\ud50c\ub9ac\ucf00\uc774\uc158<\/h3>\n<div style=\"display: flex; flex-wrap: wrap; gap: 14px; width: 100%;\">\n<div class=\"hy-tab-card\" style=\"flex: 1 1 210px; padding: 16px; background: #f8fafc;\">\n<h4 class=\"hy-card-title\">Deep-Cavity Finishing<\/h4>\n<p class=\"hy-card-text\">Light finishing of recessed pocket walls and cavity features.<\/p>\n<\/div>\n<div class=\"hy-tab-card\" style=\"flex: 1 1 210px; padding: 16px; background: #f8fafc;\">\n<h4 class=\"hy-card-title\">Narrow Grooves &amp; Ribs<\/h4>\n<p class=\"hy-card-text\">Machining small channels, ribs and detailed mold features.<\/p>\n<\/div>\n<div class=\"hy-tab-card\" style=\"flex: 1 1 210px; padding: 16px; background: #f8fafc;\">\n<h4 class=\"hy-card-title\">Side-Wall Finishing<\/h4>\n<p class=\"hy-card-text\">Controlled finishing of deep walls with reduced toolholder interference.<\/p>\n<\/div>\n<div class=\"hy-tab-card\" style=\"flex: 1 1 210px; padding: 16px; background: #f8fafc;\">\n<h4 class=\"hy-card-title\">Mold &amp; Precision Parts<\/h4>\n<p class=\"hy-card-text\">Detailed profiles in molds, dies and compact mechanical components.<\/p>\n<\/div>\n<div style=\"width: 1134px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-2061-1\" width=\"1134\" height=\"720\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-different-series-video.mp4?_=1\" \/><a href=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-different-series-video.mp4\">https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/long-neck-end-mill-different-series-video.mp4<\/a><\/video><\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<div style=\"width: 100% !important; margin: 10px 0 0 0 !important; padding: 0 !important; box-sizing: border-box !important; color: #1e293b !important; font-family: Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif !important; line-height: 1.4 !important; text-align: left !important;\">\n<div style=\"display: block !important; height: auto !important; min-height: 0 !important; margin: 0 0 6px 0 !important; padding: 0 !important; color: #2146b5 !important; font-size: 14px !important; font-weight: 700 !important; line-height: 1.3 !important; letter-spacing: .03em !important; text-transform: uppercase !important;\">HRC55 Long-Neck Square End Mill Series<\/div>\n<div style=\"display: block !important; height: auto !important; min-height: 0 !important; margin: 0 0 12px 0 !important; padding: 0 !important; color: #475569 !important; font-size: 15px !important; font-weight: 400 !important; line-height: 1.5 !important;\">Four-flute long-neck solid carbide square end mill designed for precision finishing of recessed walls, deep cavities, narrow grooves and mold ribs in carbon steel, alloy steel, mold steel and confirmed pre-hardened steel.<\/div>\n<div style=\"display: block !important; width: 100% !important; height: auto !important; min-height: 0 !important; margin: 0 0 10px 0 !important; padding: 5px 0 !important; border-top: 1px solid #cbd5e1 !important; border-bottom: 1px solid #cbd5e1 !important; box-sizing: border-box !important;\">\n<div style=\"display: flex !important; justify-content: space-between !important; align-items: flex-start !important; width: 100% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 5px 0 !important; border-bottom: 1px solid #f1f5f9 !important; box-sizing: border-box !important;\">\n<div style=\"display: flex !important; flex-direction: column !important; justify-content: flex-start !important; align-items: flex-start !important; gap: 3px !important; width: 48% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #64748b !important; font-size: 14px !important; font-weight: 600 !important; line-height: 1.3 !important;\">\uae30\ubcf8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158:<\/span><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #1e293b !important; font-size: 15px !important; font-weight: 700 !important; line-height: 1.4 !important; overflow-wrap: anywhere !important;\">Deep-Cavity &amp; Rib Finishing<\/span><\/div>\n<div style=\"display: flex !important; flex-direction: column !important; justify-content: flex-start !important; align-items: flex-start !important; gap: 3px !important; width: 48% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #64748b !important; font-size: 14px !important; font-weight: 600 !important; line-height: 1.3 !important;\">\ub3c4\uad6c \uc720\ud615:<\/span><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #1e293b !important; font-size: 15px !important; font-weight: 700 !important; line-height: 1.4 !important; overflow-wrap: anywhere !important;\">Square \/ Flat End<\/span><\/div>\n<\/div>\n<div style=\"display: flex !important; justify-content: space-between !important; align-items: flex-start !important; width: 100% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 5px 0 !important; border-bottom: 1px solid #f1f5f9 !important; box-sizing: border-box !important;\">\n<div style=\"display: flex !important; flex-direction: column !important; justify-content: flex-start !important; align-items: flex-start !important; gap: 3px !important; width: 48% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #64748b !important; font-size: 14px !important; font-weight: 600 !important; line-height: 1.3 !important;\">End Profile:<\/span><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #1e293b !important; font-size: 15px !important; font-weight: 700 !important; line-height: 1.4 !important; overflow-wrap: anywhere !important;\">\ud50c\ub7ab\/\uc0ac\uac01 \ub05d<\/span><\/div>\n<div style=\"display: flex !important; flex-direction: column !important; justify-content: flex-start !important; align-items: flex-start !important; gap: 3px !important; width: 48% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #64748b !important; font-size: 14px !important; font-weight: 600 !important; line-height: 1.3 !important;\">\ud50c\ub8e8\ud2b8 \uc218:<\/span><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #1e293b !important; font-size: 15px !important; font-weight: 700 !important; line-height: 1.4 !important; overflow-wrap: anywhere !important;\">\u00a0\ud50c\ub8e8\ud2b8 4\uac1c<\/span><\/div>\n<\/div>\n<div style=\"display: flex !important; justify-content: space-between !important; align-items: flex-start !important; width: 100% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 5px 0 !important; border-bottom: 1px solid #f1f5f9 !important; box-sizing: border-box !important;\">\n<div style=\"display: flex !important; flex-direction: column !important; justify-content: flex-start !important; align-items: flex-start !important; gap: 3px !important; width: 48% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #64748b !important; font-size: 14px !important; font-weight: 600 !important; line-height: 1.3 !important;\">Steel Hardness:<\/span><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #1e293b !important; font-size: 15px !important; font-weight: 700 !important; line-height: 1.4 !important; overflow-wrap: anywhere !important;\">\ucd5c\ub300 HRC55<\/span><\/div>\n<div style=\"display: flex !important; flex-direction: column !important; justify-content: flex-start !important; align-items: flex-start !important; gap: 3px !important; width: 48% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #64748b !important; font-size: 14px !important; font-weight: 600 !important; line-height: 1.3 !important;\">Effective Neck Length:<\/span><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #1e293b !important; font-size: 15px !important; font-weight: 700 !important; line-height: 1.4 !important; overflow-wrap: anywhere !important;\">4\u201330 mm<\/span><\/div>\n<\/div>\n<div style=\"display: flex !important; justify-content: space-between !important; align-items: flex-start !important; width: 100% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 5px 0 !important; box-sizing: border-box !important;\">\n<div style=\"display: flex !important; flex-direction: column !important; justify-content: flex-start !important; align-items: flex-start !important; gap: 3px !important; width: 48% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #64748b !important; font-size: 14px !important; font-weight: 600 !important; line-height: 1.3 !important;\">Dia. Range:<\/span><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #1e293b !important; font-size: 15px !important; font-weight: 700 !important; line-height: 1.4 !important; overflow-wrap: anywhere !important;\">\u00d81\u2013\u00d83 mm<\/span><\/div>\n<div style=\"display: flex !important; flex-direction: column !important; justify-content: flex-start !important; align-items: flex-start !important; gap: 3px !important; width: 48% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #64748b !important; font-size: 14px !important; font-weight: 600 !important; line-height: 1.3 !important;\">\uc804\uccb4 \uae38\uc774:<\/span><span style=\"display: block !important; flex: none !important; margin: 0 !important; padding: 0 !important; color: #1e293b !important; font-size: 15px !important; font-weight: 700 !important; line-height: 1.4 !important; overflow-wrap: anywhere !important;\">50 \/ 75 mm<\/span><\/div>\n<\/div>\n<\/div>\n<div style=\"display: block !important; width: 100% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\">\n<div style=\"display: block !important; height: auto !important; min-height: 0 !important; margin: 0 0 7px 0 !important; padding: 0 !important; color: #64748b !important; font-size: 13px !important; font-weight: 700 !important; line-height: 1.2 !important; letter-spacing: .02em !important; text-transform: uppercase !important;\">Application \/ Material<\/div>\n<div style=\"display: flex !important; flex-wrap: wrap !important; align-items: center !important; gap: 5px 8px !important; width: 100% !important; height: auto !important; min-height: 0 !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\"><span style=\"display: inline-block !important; margin: 0 !important; padding: 3px 8px !important; border: 1px solid #bfdbfe !important; border-radius: 3px !important; background: #eff6ff !important; color: #1e3a8a !important; font-size: 11px !important; font-weight: 700 !important; line-height: 1.25 !important; white-space: nowrap !important;\">P Carbon Steel<\/span><span style=\"display: inline-block !important; margin: 0 !important; padding: 3px 8px !important; border: 1px solid #bfdbfe !important; border-radius: 3px !important; background: #eff6ff !important; color: #1e3a8a !important; font-size: 11px !important; font-weight: 700 !important; line-height: 1.25 !important; white-space: nowrap !important;\">P Alloy Steel<\/span><span style=\"display: inline-block !important; margin: 0 !important; padding: 3px 8px !important; border: 1px solid #bfdbfe !important; border-radius: 3px !important; background: #eff6ff !important; color: #1e3a8a !important; 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