{"id":616,"date":"2025-10-23T23:39:16","date_gmt":"2025-10-23T23:39:16","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&#038;p=616"},"modified":"2026-10-23T06:17:27","modified_gmt":"2026-10-23T06:17:27","slug":"custom-hrc55-4-flute-square-end-mill","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/th\/product\/custom-hrc55-4-flute-square-end-mill\/","title":{"rendered":"\u0e14\u0e2d\u0e01\u0e40\u0e2d\u0e47\u0e19\u0e21\u0e34\u0e25\u0e42\u0e0b\u0e25\u0e34\u0e14\u0e04\u0e32\u0e23\u0e4c\u0e44\u0e1a\u0e14\u0e4c 4 \u0e1f\u0e31\u0e19 HRC55 \u0e2a\u0e31\u0e48\u0e07\u0e17\u0e33\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a\u0e40\u0e2b\u0e25\u0e47\u0e01"},"content":{"rendered":"<p><!-- HRC55 CUSTOM END MILL OVERVIEW --><\/p>\n<style>\n@media screen and (max-width: 767px) {<br \/>  .hy-overview-layout {<br \/>    padding-left: 12px !important;<br \/>    padding-right: 12px !important;<br \/>  }<\/p>\n<p>  .hy-overview-layout > section {<br \/>    padding-top: 24px !important;<br \/>    padding-bottom: 24px !important;<br \/>  }<\/p>\n<p>  .hy-overview-layout > section:first-child {<br \/>    padding-top: 0 !important;<br \/>  }<\/p>\n<p>  .hy-overview-layout h2 {<br \/>    font-size: 27px !important;<br \/>    line-height: 1.25 !important;<br \/>  }<\/p>\n<p>  .hy-overview-layout h3 {<br \/>    font-size: 23px !important;<br \/>    line-height: 1.3 !important;<br \/>  }<\/p>\n<p>  .hy-hero-heading-mobile {<br \/>    margin-bottom: 24px !important;<br \/>  }<\/p>\n<p>  .hy-section-heading-mobile {<br \/>    margin-bottom: 18px !important;<br \/>  }<\/p>\n<p>  .hy-product-gallery-mobile {<br \/>    grid-template-columns: minmax(0, 1fr) !important;<br \/>    gap: 16px !important;<br \/>  }<\/p>\n<p>  .hy-product-gallery-mobile img {<br \/>    height: auto !important;<br \/>    aspect-ratio: auto !important;<br \/>    object-fit: contain !important;<br \/>  }<\/p>\n<p>  .hy-core-video {<br \/>    order: 1 !important;<br \/>  }<\/p>\n<p>  .hy-core-copy {<br \/>    order: 2 !important;<br \/>  }<\/p>\n<p>  .hy-advantage-mobile {<br \/>    display: flex !important;<br \/>    flex-direction: column !important;<br \/>    align-items: stretch !important;<br \/>    gap: 18px !important;<br \/>    padding: 24px 0 !important;<br \/>  }<\/p>\n<p>  .hy-advantage-mobile:last-child {<br \/>    padding-bottom: 0 !important;<br \/>  }<\/p>\n<p>  .hy-advantage-image-mobile {<br \/>    order: 1 !important;<br \/>    width: 100% !important;<br \/>  }<\/p>\n<p>  .hy-advantage-copy-mobile {<br \/>    order: 2 !important;<br \/>    width: 100% !important;<br \/>  }<\/p>\n<p>  .hy-advantage-image-mobile img {<br \/>    height: auto !important;<br \/>    aspect-ratio: auto !important;<br \/>    object-fit: contain !important;<br \/>  }<\/p>\n<p>  .hy-advantage-copy-mobile h4 {<br \/>    font-size: 21px !important;<br \/>    line-height: 1.35 !important;<br \/>  }<br \/>}<br \/><\/style>\n<div class=\"hy-overview-layout\" style=\"width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 16px; box-sizing: border-box; color: #526174; background: #fff; font-family: Inter, Arial, sans-serif; font-size: 16px; line-height: 1.65;\">\n<p><!-- SECTION 1 \u2014 OVERVIEW & CORE DESIGN --><\/p>\n<section style=\"padding: 0 0 48px; border-bottom: 1px solid #e5eaf0;\">\n<div class=\"hy-hero-heading-mobile\" style=\"max-width: 900px; margin: 0 auto 30px; text-align: center;\">\n<p><span style=\"display: inline-block; margin-bottom: 14px; padding: 7px 14px; border-radius: 999px; color: #2146b5; background: #eef3ff; font-size: 12px; font-weight: bold; letter-spacing: .12em; text-transform: uppercase;\">Custom HRC55 Series<\/span><\/p>\n<h2 style=\"margin: 0 0 18px; color: #172033; font-size: clamp(30px, 4vw, 46px); line-height: 1.15; font-weight: bold;\">Custom 4-Flute Solid Carbide Square End Mill<\/h2>\n<p style=\"max-width: 820px; margin: 0 auto; color: #5b6878; font-size: 16px; line-height: 1.85;\">Custom diameters, flute lengths, shank sizes and cutting geometry for CNC milling of carbon steel, alloy steel and selected mold steel. Precision-ground four-flute design supports stable profiling, shoulder milling and finishing.<\/p>\n<\/div>\n<div class=\"hy-section-heading-mobile\" style=\"max-width: 760px; margin: 0 auto 24px; text-align: center;\">\n<p><span style=\"display: block; margin-bottom: 8px; color: #2146b5; font-size: 12px; font-weight: bold; letter-spacing: .13em; text-transform: uppercase;\">Core Design<\/span><\/p>\n<h3 style=\"margin: 0; color: #172033; font-size: clamp(25px, 3vw, 34px); line-height: 1.25;\">\u0e04\u0e38\u0e13\u0e2a\u0e21\u0e1a\u0e31\u0e15\u0e34\u0e2b\u0e25\u0e31\u0e01<\/h3>\n<\/div>\n<div style=\"display: flex; flex-wrap: wrap; align-items: center; gap: 24px; width: 100%; box-sizing: border-box;\">\n<p><!-- LEFT: FEATURES --><\/p>\n<div class=\"hy-core-copy\" style=\"flex: 1 1 360px; min-width: 0;\">\n<div style=\"display: flex; flex-direction: column; gap: 18px;\">\n<div style=\"display: flex; gap: 14px; align-items: flex-start; padding-bottom: 15px; border-bottom: 1px solid #e5eaf0;\">\n<p><span style=\"display: flex; flex: 0 0 36px; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: 50%; color: #fff; background: #2146b5; font-size: 12px; font-weight: bold;\">01<\/span><\/p>\n<div style=\"min-width: 0;\">\n<h4 style=\"margin: 0 0 5px; color: #172033; font-size: 17px; line-height: 1.35;\">\u0e02\u0e19\u0e32\u0e14\u0e15\u0e32\u0e21\u0e2a\u0e31\u0e48\u0e07<\/h4>\n<p style=\"margin: 0; color: #5b6878; font-size: 14px; line-height: 1.6;\">Custom diameters, flute lengths, shank sizes and overall lengths.<\/p>\n<\/div>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start; padding-bottom: 15px; border-bottom: 1px solid #e5eaf0;\">\n<p><span style=\"display: flex; flex: 0 0 36px; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: 50%; color: #fff; background: #2146b5; font-size: 12px; font-weight: bold;\">02<\/span><\/p>\n<div style=\"min-width: 0;\">\n<h4 style=\"margin: 0 0 5px; color: #172033; font-size: 17px; line-height: 1.35;\">Custom Cutting Geometry<\/h4>\n<p style=\"margin: 0; color: #5b6878; font-size: 14px; line-height: 1.6;\">Application-matched flute geometry for stable steel milling.<\/p>\n<\/div>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start; padding-bottom: 15px; border-bottom: 1px solid #e5eaf0;\">\n<p><span style=\"display: flex; flex: 0 0 36px; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: 50%; color: #fff; background: #2146b5; font-size: 12px; font-weight: bold;\">03<\/span><\/p>\n<div style=\"min-width: 0;\">\n<h4 style=\"margin: 0 0 5px; color: #172033; font-size: 17px; line-height: 1.35;\">\u0e01\u0e32\u0e23\u0e41\u0e1b\u0e23\u0e23\u0e39\u0e1b\u0e40\u0e2b\u0e25\u0e47\u0e01<\/h4>\n<p style=\"margin: 0; color: #5b6878; font-size: 14px; line-height: 1.6;\">For carbon steel, alloy steel and selected mold steels.<\/p>\n<\/div>\n<\/div>\n<div style=\"display: flex; gap: 14px; align-items: flex-start;\">\n<p><span style=\"display: flex; flex: 0 0 36px; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: 50%; color: #fff; background: #2146b5; font-size: 12px; font-weight: bold;\">04<\/span><\/p>\n<div style=\"min-width: 0;\">\n<h4 style=\"margin: 0 0 5px; color: #172033; font-size: 17px; line-height: 1.35;\">OEM \u0e41\u0e25\u0e30\u0e41\u0e1a\u0e23\u0e19\u0e14\u0e4c\u0e2a\u0e48\u0e27\u0e19\u0e15\u0e31\u0e27<\/h4>\n<p style=\"margin: 0; color: #5b6878; font-size: 14px; line-height: 1.6;\">Custom coatings, laser marking and branded packaging.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- RIGHT: VIDEO --><\/p>\n<div class=\"hy-core-video\" style=\"flex: 1 1 420px; min-width: 0; border: 0; box-shadow: none; background: transparent;\">\n<p><video class=\"lazyload\" style=\"display: block; width: 66.67%; height: auto; margin: 0 auto; padding: 0; border: 0; outline: none; border-radius: 0; box-shadow: none; background: transparent; object-fit: contain;\" preload=\"metadata\" autoplay=\"autoplay\" loop=\"loop\" muted=\"\" controls=\"controls\" width=\"300\" height=\"150\"><source src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/10\/hrc55-square-end-mill-custimization-options-products-video-hy-cutting-tools.mp4\" type=\"video\/mp4\" \/>\u0e40\u0e1a\u0e23\u0e32\u0e27\u0e4c\u0e40\u0e0b\u0e2d\u0e23\u0e4c\u0e02\u0e2d\u0e07\u0e04\u0e38\u0e13\u0e44\u0e21\u0e48\u0e23\u0e2d\u0e07\u0e23\u0e31\u0e1a\u0e27\u0e34\u0e14\u0e35\u0e42\u0e2d HTML5.<\/video><\/p>\n<p style=\"margin: 10px 0 0; color: #657286; font-size: 13px; line-height: 1.5; text-align: center;\">Custom HRC55 4-Flute Square End Mill Product Display<\/p>\n<\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<\/section>\n<p><!-- SECTION 2 \u2014 PRODUCT VIEWS --><\/p>\n<section style=\"padding: 48px 0; border-bottom: 1px solid #e5eaf0;\">\n<div class=\"hy-section-heading-mobile\" style=\"max-width: 760px; margin: 0 auto 30px; text-align: center;\">\n<p><span style=\"display: block; margin-bottom: 8px; color: #2146b5; font-size: 12px; font-weight: bold; letter-spacing: .13em; text-transform: uppercase;\">Product Views<\/span><\/p>\n<h3 style=\"margin: 0; color: #172033; font-size: clamp(25px, 3vw, 34px); line-height: 1.25;\">Custom Tool Configurations &amp; OEM Options<\/h3>\n<\/div>\n<div class=\"hy-product-gallery-mobile\" style=\"display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px;\">\n<div style=\"overflow: hidden; border: 1px solid #dce4ee; border-radius: 10px; background: #f8fafc;\">\n<p><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Inch-Size-4-Flutes-Square-End-Mills-HRC55-5_\u526f\u672c.webp\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Custom diameter options for HRC55 square end mills\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Inch-Size-4-Flutes-Square-End-Mills-HRC55-5_\u526f\u672c.webp\" alt=\"Custom diameter options for HRC55 square end mills\" title=\"\"><\/noscript><\/p>\n<p style=\"margin: 0; padding: 13px 15px; color: #344155; font-size: 13px; font-weight: 600; text-align: center;\">Custom Diameter Options<\/p>\n<\/div>\n<div style=\"overflow: hidden; border: 1px solid #dce4ee; border-radius: 10px; background: #f8fafc;\">\n<p><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Inch-Size-4-Flutes-Square-End-Mills-HRC55-4_\u526f\u672c.webp\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Custom four-flute square end mill cutting geometry\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Inch-Size-4-Flutes-Square-End-Mills-HRC55-4_\u526f\u672c.webp\" alt=\"Custom four-flute square end mill cutting geometry\" title=\"\"><\/noscript><\/p>\n<p style=\"margin: 0; padding: 13px 15px; color: #344155; font-size: 13px; font-weight: 600; text-align: center;\">Custom Cutting Geometry<\/p>\n<\/div>\n<div style=\"overflow: hidden; border: 1px solid #dce4ee; border-radius: 10px; background: #f8fafc;\">\n<p><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/OEM-Private-Label-Solutions-hy-cutting-tools.png\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"HRC55 square end mill OEM packaging reference\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/OEM-Private-Label-Solutions-hy-cutting-tools.png\" alt=\"HRC55 square end mill OEM packaging reference\" title=\"\"><\/noscript><\/p>\n<p style=\"margin: 0; padding: 13px 15px; color: #344155; font-size: 13px; font-weight: 600; text-align: center;\">OEM Packaging Options<\/p>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- SECTION 3 \u2014 PRODUCT ADVANTAGES --><\/p>\n<section style=\"padding: 48px 0; border-bottom: 1px solid #e5eaf0;\">\n<div class=\"hy-section-heading-mobile\" style=\"max-width: 760px; margin: 0 auto 12px; text-align: center;\">\n<p><span style=\"display: block; margin-bottom: 8px; color: #2146b5; font-size: 12px; font-weight: bold; letter-spacing: .13em; text-transform: uppercase;\">Performance Details<\/span><\/p>\n<h3 style=\"margin: 0 0 12px; color: #172033; font-size: clamp(25px, 3vw, 34px); line-height: 1.25;\">Product Advantages<\/h3>\n<p style=\"margin: 0; color: #657286; font-size: 15px; line-height: 1.75;\">Custom cutting dimensions and geometry tailored to steel-milling requirements.<\/p>\n<\/div>\n<p><!-- ADVANTAGE 01 --><\/p>\n<div class=\"hy-advantage-mobile\" style=\"display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); align-items: center; gap: clamp(32px,6vw,76px); padding: 44px 0; border-bottom: 1px solid #e5eaf0;\">\n<div class=\"hy-advantage-copy-mobile\">\n<p><span style=\"display: block; margin-bottom: 10px; color: #2146b5; font-size: 12px; font-weight: bold; letter-spacing: .13em; text-transform: uppercase;\">Advantage 01<\/span><\/p>\n<h4 style=\"margin: 0 0 15px; color: #172033; font-size: clamp(23px,2.8vw,31px); line-height: 1.25;\">Custom Four-Flute Cutting<\/h4>\n<p style=\"margin: 0 0 17px; color: #5b6878; font-size: 15px; line-height: 1.85;\">Four-flute geometry and cutting dimensions can be adapted to steel profiling, shoulder milling and finishing requirements.<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #344155; font-size: 14px; line-height: 1.9;\">\n<li>Application-matched flute design<\/li>\n<li>Rigid carbide construction<\/li>\n<li>Controlled steel milling<\/li>\n<\/ul>\n<\/div>\n<div class=\"hy-advantage-image-mobile\" style=\"overflow: hidden; border-radius: 12px; background: #f2f5f8; box-shadow: 0 12px 30px rgba(21,38,70,.10);\"><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/key-features-HRC55-2-Flute-e1773223551419.png\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"HRC55 carbide end mill cutting geometry details\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/key-features-HRC55-2-Flute-e1773223551419.png\" alt=\"HRC55 carbide end mill cutting geometry details\" title=\"\"><\/noscript><\/div>\n<\/div>\n<p><!-- ADVANTAGE 02 --><\/p>\n<div class=\"hy-advantage-mobile\" style=\"display: grid; grid-template-columns: minmax(0,1.1fr) minmax(0,.9fr); align-items: center; gap: clamp(32px,6vw,76px); padding: 44px 0; border-bottom: 1px solid #e5eaf0;\">\n<div class=\"hy-advantage-image-mobile\" style=\"overflow: hidden; border-radius: 12px; background: #f2f5f8; box-shadow: 0 12px 30px rgba(21,38,70,.10);\"><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Inch-Size-4-Flutes-Square-End-Mills-HRC55-1_\u526f\u672c-scaled.webp\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Custom inch-size HRC55 four-flute carbide end mills\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/Inch-Size-4-Flutes-Square-End-Mills-HRC55-1_\u526f\u672c-scaled.webp\" alt=\"Custom inch-size HRC55 four-flute carbide end mills\" title=\"\"><\/noscript><\/div>\n<div class=\"hy-advantage-copy-mobile\">\n<p><span style=\"display: block; margin-bottom: 10px; color: #2146b5; font-size: 12px; font-weight: bold; letter-spacing: .13em; text-transform: uppercase;\">Advantage 02<\/span><\/p>\n<h4 style=\"margin: 0 0 15px; color: #172033; font-size: clamp(23px,2.8vw,31px); line-height: 1.25;\">Coating Options for Steel<\/h4>\n<p style=\"margin: 0 0 17px; color: #5b6878; font-size: 15px; line-height: 1.85;\">Fine-grain carbide and selected coatings support wear resistance for carbon steel, alloy steel and mold steel.<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #344155; font-size: 14px; line-height: 1.9;\">\n<li>Fine-grain carbide base<\/li>\n<li>Steel-matched coating options<\/li>\n<li>Consistent cutting-edge quality<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p><!-- ADVANTAGE 03 --><\/p>\n<div class=\"hy-advantage-mobile\" style=\"display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); align-items: center; gap: clamp(32px,6vw,76px); padding: 44px 0; border-bottom: 1px solid #e5eaf0;\">\n<div class=\"hy-advantage-copy-mobile\">\n<p><span style=\"display: block; margin-bottom: 10px; color: #2146b5; font-size: 12px; font-weight: bold; letter-spacing: .13em; text-transform: uppercase;\">Advantage 03<\/span><\/p>\n<h4 style=\"margin: 0 0 15px; color: #172033; font-size: clamp(23px,2.8vw,31px); line-height: 1.25;\">Custom Square-End Geometry<\/h4>\n<p style=\"margin: 0 0 17px; color: #5b6878; font-size: 15px; line-height: 1.85;\">Custom diameters, cutting lengths and square-end geometry can be specified for accurate shoulders and steel finishing.<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #344155; font-size: 14px; line-height: 1.9;\">\n<li>Custom cutting dimensions<\/li>\n<li>Precision square-end profile<\/li>\n<li>Drawing-based specifications<\/li>\n<\/ul>\n<\/div>\n<div class=\"hy-advantage-image-mobile\" style=\"overflow: hidden; border-radius: 12px; background: #f2f5f8; box-shadow: 0 12px 30px rgba(21,38,70,.10);\"><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/10\/Custom-Square-End-mill-Geometry-hrc55-square-end-mills.png\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Custom solid carbide square end mill cutting edge detail\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/10\/Custom-Square-End-mill-Geometry-hrc55-square-end-mills.png\" alt=\"Custom solid carbide square end mill cutting edge detail\" title=\"\"><\/noscript><\/div>\n<\/div>\n<p><!-- ADVANTAGE 04 --><\/p>\n<div class=\"hy-advantage-mobile\" style=\"display: grid; grid-template-columns: minmax(0,1.1fr) minmax(0,.9fr); align-items: center; gap: clamp(32px,6vw,76px); padding: 44px 0 0;\">\n<div class=\"hy-advantage-image-mobile\" style=\"overflow: hidden; border-radius: 12px; background: #f2f5f8; box-shadow: 0 12px 30px rgba(21,38,70,.10);\"><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/square-end-mill-HRC55-different-sizes.png\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"HRC55 solid carbide square end mill size options\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/square-end-mill-HRC55-different-sizes.png\" alt=\"HRC55 solid carbide square end mill size options\" title=\"\"><\/noscript><\/div>\n<div class=\"hy-advantage-copy-mobile\">\n<p><span style=\"display: block; margin-bottom: 10px; color: #2146b5; font-size: 12px; font-weight: bold; letter-spacing: .13em; text-transform: uppercase;\">Advantage 04<\/span><\/p>\n<h4 style=\"margin: 0 0 15px; color: #172033; font-size: clamp(23px,2.8vw,31px); line-height: 1.25;\">Custom Dimensions &amp; OEM Supply<\/h4>\n<p style=\"margin: 0 0 17px; color: #5b6878; font-size: 15px; line-height: 1.85;\">Custom configurations are available for distributors, OEM tooling brands and buyers requiring non-standard steel-milling tools.<\/p>\n<ul style=\"margin: 0; padding-left: 20px; color: #344155; font-size: 14px; line-height: 1.9;\">\n<li>Custom diameters, lengths and shanks<\/li>\n<li>Optional geometry and coatings<\/li>\n<li>Laser marking and branded packaging<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- SECTION 4 \u2014 APPLICATION NOTE --><\/p>\n<section style=\"padding: 28px 0 0;\">\n<div style=\"padding: 20px 22px; border-left: 4px solid #2146b5; border-radius: 0 6px 6px 0; background: #f8fafc;\">\n<p><strong style=\"display: block; margin-bottom: 7px; color: #172033; font-size: 15px;\">Application Note<\/strong><\/p>\n<p style=\"margin: 0; color: #5b6878; font-size: 14px; line-height: 1.8;\">HRC55 is a series application target, not a guarantee for every workpiece. Confirm material grade, hardness, custom tool dimensions and cutting conditions before production.<\/p>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<section style=\"width: 100%; margin: 0; padding: 0; box-sizing: border-box; font-family: Inter,Arial,Helvetica,sans-serif;\"><!-- PRODUCT POSITIONING --><\/p>\n<div style=\"margin: 0 0 10px; padding: 0;\">\n<p><span style=\"display: block; margin: 0 0 6px; color: #2146b5; font-size: 13px; font-weight: bold; letter-spacing: .06em;\">CUSTOM HRC55 4-FLUTE SERIES<\/span><\/p>\n<p style=\"margin: 0; color: #475569; font-size: 15px; line-height: 1.5;\">Custom 4-flute carbide square end mills for carbon steel, alloy steel and mold steel, with tailored dimensions, cutting geometry and coatings.<\/p>\n<\/div>\n<p><!-- VERTICAL INFORMATION TABLE --><\/p>\n<div style=\"width: 100%; margin: 0; padding: 0; border-top: 1px solid #e2e8f0;\">\n<p><!-- COATING OPTIONS --><\/p>\n<div style=\"display: flex; gap: 10px; padding: 5px 0; border-bottom: 1px solid #e2e8f0; align-items: flex-start;\"><strong style=\"flex: 0 0 29%; color: #1e293b; font-size: 14px; line-height: 1.4;\">\u0e15\u0e31\u0e27\u0e40\u0e25\u0e37\u0e2d\u0e01\u0e01\u0e32\u0e23\u0e40\u0e04\u0e25\u0e37\u0e2d\u0e1a<\/strong><br \/>\n<span style=\"flex: 1; min-width: 0; color: #475569; font-size: 14px; line-height: 1.4;\">TiSiN, AlTiN and application-matched coatings.<\/span><\/div>\n<p><!-- CUSTOM MOQ --><\/p>\n<div style=\"display: flex; gap: 10px; padding: 5px 0; border-bottom: 1px solid #e2e8f0; align-items: flex-start;\"><strong style=\"flex: 0 0 29%; color: #1e293b; font-size: 14px; line-height: 1.4;\">Custom MOQ<\/strong><br \/>\n<span style=\"flex: 1; min-width: 0; color: #475569; font-size: 14px; line-height: 1.4;\">Normally 3-10pcs. Based on specifications and quantity.<\/span><\/div>\n<p><!-- LEAD TIME --><\/p>\n<div style=\"display: flex; gap: 10px; padding: 5px 0; border-bottom: 1px solid #e2e8f0; align-items: flex-start;\"><strong style=\"flex: 0 0 29%; color: #1e293b; font-size: 14px; line-height: 1.4;\">\u0e23\u0e30\u0e22\u0e30\u0e40\u0e27\u0e25\u0e32\u0e14\u0e33\u0e40\u0e19\u0e34\u0e19\u0e01\u0e32\u0e23<\/strong><br \/>\n<span style=\"flex: 1; min-width: 0; color: #475569; font-size: 14px; line-height: 1.4;\">Confirmed after specification and order review.<\/span><\/div>\n<p><!-- OEM BRANDING --><\/p>\n<div style=\"display: flex; gap: 10px; padding: 5px 0; border-bottom: 1px solid #e2e8f0; align-items: flex-start;\"><strong style=\"flex: 0 0 29%; color: #1e293b; font-size: 14px; line-height: 1.4;\">OEM Branding<\/strong><br \/>\n<span style=\"flex: 1; min-width: 0; color: #475569; font-size: 14px; line-height: 1.4;\">Laser marking, custom labels and packaging.<\/span><\/div>\n<\/div>\n<\/section>","protected":false},"featured_media":8264,"template":"","meta":{"_acf_changed":false,"googlesitekit_rrm_CAowkrPfCw:productID":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[2604,3641],"product_tag":[2693,424,2670],"class_list":["post-616","product","type-product","status-publish","has-post-thumbnail","product_cat-solid-carbide-end-mills","product_cat-square-end-mills","product_tag-cnc-milling","product_tag-square-end-mill","product_tag-steel-machining","pa_workpiece-material-carbon-alloy-steel","pa_workpiece-material-cast-iron","first","instock","shipping-taxable","product-type-simple","entry","content-bg","loop-entry"],"acf":[],"taxonomy_info":{"product_cat":[{"value":2604,"label":"Solid Carbide End Mills"},{"value":3641,"label":"Square End Mills"}],"product_tag":[{"value":2693,"label":"CNC Milling"},{"value":424,"label":"square end mill"},{"value":2670,"label":"Steel Machining"}],"pa_workpiece-material":[{"value":3617,"label":"Carbon &amp; Alloy Steel"},{"value":3688,"label":"Cast Iron"}]},"featured_image_src_large":["https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/09\/square-end-mill-HRC55-different-sizes-1024x1024.png",1024,1024,true],"author_info":[],"comment_info":"","_links":{"self":[{"href":"https:\/\/hycuttingtools.com\/th\/wp-json\/wp\/v2\/product\/616","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hycuttingtools.com\/th\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hycuttingtools.com\/th\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hycuttingtools.com\/th\/wp-json\/wp\/v2\/media\/8264"}],"wp:attachment":[{"href":"https:\/\/hycuttingtools.com\/th\/wp-json\/wp\/v2\/media?parent=616"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hycuttingtools.com\/th\/wp-json\/wp\/v2\/product_brand?post=616"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hycuttingtools.com\/th\/wp-json\/wp\/v2\/product_cat?post=616"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hycuttingtools.com\/th\/wp-json\/wp\/v2\/product_tag?post=616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}