{"id":4044,"date":"2026-08-05T12:33:16","date_gmt":"2026-08-05T12:33:16","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&#038;p=4044"},"modified":"2026-09-19T09:02:49","modified_gmt":"2026-09-19T09:02:49","slug":"mkr-series-solid-carbide-micro-radius-grooving-bars","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/it\/prodotto\/mkr-series-solid-carbide-micro-radius-grooving-bars\/","title":{"rendered":"MKR Series Solid Carbide Micro Radius Grooving Bars for Internal Groove Machining"},"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><!-- INTRODUCTION --><\/p>\n<section class=\"hy-tab-section\">\n<h2 class=\"hy-tab-main-title\">MKR Micro Radius Grooving Bars<\/h2>\n<p class=\"hy-tab-intro\">MKR series solid carbide micro radius grooving bars are designed for machining precision full-radius grooves and smooth relief profiles inside small bores. The precision-ground cutting profile produces controlled groove radii and consistent curved groove bottoms in miniature turned components.<\/p>\n<p style=\"margin: 0; color: #475569; font-size: 14px; line-height: 1.7;\">Standard models cover R0.3 to R1.0 mm radii, \u00d84 to \u00d88 mm shanks and minimum bore diameters from \u00d84.1 to \u00d88.1 mm. Multiple working lengths are available for shallow and recessed internal grooves, with drawing-based customization available for non-standard profiles and dimensions.<\/p>\n<\/section>\n<p><!-- MAIN PRODUCT PHOTO --><\/p>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Panoramica del prodotto<\/h3>\n<div style=\"width: 100%; max-width: 820px; margin: 0 auto;\">\n<p><img data-srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product.jpg 800w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-300x300.jpg 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-150x150.jpg 150w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-768x768.jpg 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-12x12.jpg 12w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-100x100.jpg 100w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-228x228.jpg 228w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-114x114.jpg 114w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-224x224.jpg 224w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-112x112.jpg 112w\" decoding=\"async\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product.jpg\" class=\"aligncenter wp-image-4084 size-full lazyload\" style=\"display: block; width: 100%; max-width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"MKR solid carbide micro radius grooving bars\"   title=\"\"  sizes=\"(max-width: 800px) 100vw, 800px\" \/><noscript><img decoding=\"async\" class=\"aligncenter wp-image-4084 size-full\" style=\"display: block; width: 100%; max-width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product.jpg\" alt=\"MKR solid carbide micro radius grooving bars\" width=\"800\" height=\"800\" title=\"\" srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product.jpg 800w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-300x300.jpg 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-150x150.jpg 150w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-768x768.jpg 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-12x12.jpg 12w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-100x100.jpg 100w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-228x228.jpg 228w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-114x114.jpg 114w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-224x224.jpg 224w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-main-product-112x112.jpg 112w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/noscript><\/p>\n<\/div>\n<\/section>\n<p><!-- KEY PRODUCT ADVANTAGES --><\/p>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Key Product Advantages<\/h3>\n<h3 class=\"hy-section-title\"><img data-srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages.png 866w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-143x300.png 143w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-488x1024.png 488w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-768x1611.png 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-732x1536.png 732w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-6x12.png 6w\" decoding=\"async\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages.png\" class=\"aligncenter wp-image-8703 size-full lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"MKR Series Solid Carbide Micro Radius Grooving Bars product advantages\"   title=\"\"  sizes=\"(max-width: 866px) 100vw, 866px\" \/><noscript><img decoding=\"async\" class=\"aligncenter wp-image-8703 size-full\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages.png\" alt=\"MKR Series Solid Carbide Micro Radius Grooving Bars product advantages\" width=\"866\" height=\"1817\" title=\"\" srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages.png 866w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-143x300.png 143w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-488x1024.png 488w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-768x1611.png 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-732x1536.png 732w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-product-advantages-6x12.png 6w\" sizes=\"(max-width: 866px) 100vw, 866px\" \/><\/noscript><\/h3>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; width: 100%;\">\n<div style=\"flex: 1 1 calc(50% - 10px); min-width: 250px; padding: 15px 16px; background: #f8fafc; border-radius: 4px;\"><strong style=\"display: block; margin: 0 0 5px; color: #0f766e; font-size: 15px;\">Full-Radius Groove Profile<\/strong><br \/>\n<span style=\"display: block; color: #475569; font-size: 14px; line-height: 1.65;\">Precision-ground cutting geometry produces controlled curved groove bottoms and smooth internal transitions.<\/span><\/div>\n<div style=\"flex: 1 1 calc(50% - 10px); min-width: 250px; padding: 15px 16px; background: #f8fafc; border-radius: 4px;\"><strong style=\"display: block; margin: 0 0 5px; color: #0f766e; font-size: 15px;\">Small-Bore Access<\/strong><br \/>\n<span style=\"display: block; color: #475569; font-size: 14px; line-height: 1.65;\">Standard models support minimum machining diameters from \u00d84.1 to \u00d88.1 mm.<\/span><\/div>\n<div style=\"flex: 1 1 calc(50% - 10px); min-width: 250px; padding: 15px 16px; background: #f8fafc; border-radius: 4px;\"><strong style=\"display: block; margin: 0 0 5px; color: #0f766e; font-size: 15px;\">Solid Carbide Construction<\/strong><br \/>\n<span style=\"display: block; color: #475569; font-size: 14px; line-height: 1.65;\">Integral carbide construction provides rigidity and helps control deflection during precision internal grooving.<\/span><\/div>\n<div style=\"flex: 1 1 calc(50% - 10px); min-width: 250px; padding: 15px 16px; background: #f8fafc; border-radius: 4px;\"><strong style=\"display: block; margin: 0 0 5px; color: #0f766e; font-size: 15px;\">Multiple Radius Options<\/strong><br \/>\n<span style=\"display: block; color: #475569; font-size: 14px; line-height: 1.65;\">Standard R0.3, R0.4, R0.5, R0.6, R0.75 and R1.0 profiles cover different groove forms and component sizes.<\/span><\/div>\n<\/div>\n<\/section>\n<p><!-- APPLICATIONS --><\/p>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Applicazioni tipiche<\/h3>\n<div class=\"hy-overview-table-scroll\" style=\"display: block; width: 100%; max-width: 100%; overflow-x: auto;\">\n<table style=\"width: 100%; min-width: 650px; margin: 0; border-collapse: collapse; color: #1e293b; font-size: 14px;\">\n<thead>\n<tr style=\"background: #EEF8F1;\">\n<th style=\"padding: 12px 16px; border-bottom: 2px solid #cbd5e1; text-align: left;\">Applicazione<\/th>\n<th style=\"padding: 12px 16px; border-bottom: 2px solid #cbd5e1; text-align: left;\">Machining Purpose<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 12px 16px; border-bottom: 1px solid #f1f5f9; font-weight: 600;\">Internal Radius Grooving<\/td>\n<td style=\"padding: 12px 16px; border-bottom: 1px solid #f1f5f9; color: #475569;\">Produces full-radius grooves inside small-diameter bores.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px; border-bottom: 1px solid #f1f5f9; font-weight: 600;\">Internal Relief Profiles<\/td>\n<td style=\"padding: 12px 16px; border-bottom: 1px solid #f1f5f9; color: #475569;\">Machines smooth relief features and curved transitions near internal shoulders.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px; border-bottom: 1px solid #f1f5f9; font-weight: 600;\">Precision Form Grooving<\/td>\n<td style=\"padding: 12px 16px; border-bottom: 1px solid #f1f5f9; color: #475569;\">Forms repeatable radiused groove profiles in miniature turned components.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 16px; font-weight: 600;\">Recessed Internal Features<\/td>\n<td style=\"padding: 12px 16px; color: #475569;\">Longer working-length models provide access to grooves located deeper inside the bore.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<p><!-- PRODUCT DETAIL PHOTO --><\/p>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Product Detail Photo<\/h3>\n<div style=\"width: 100%; max-width: 820px; margin: 0 auto;\">\n<p><img data-srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo.png 982w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo-291x300.png 291w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo-768x791.png 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo-12x12.png 12w\" decoding=\"async\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo.png\" class=\"aligncenter wp-image-8701 size-full lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"MKR internal boring bar real photo\"   title=\"\"  sizes=\"(max-width: 982px) 100vw, 982px\" \/><noscript><img decoding=\"async\" class=\"aligncenter wp-image-8701 size-full\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo.png\" alt=\"MKR internal boring bar real photo\" width=\"982\" height=\"1012\" title=\"\" srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo.png 982w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo-291x300.png 291w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo-768x791.png 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-internal-boring-bar-real-photo-12x12.png 12w\" sizes=\"(max-width: 982px) 100vw, 982px\" \/><\/noscript><img data-srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo.jpg 800w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-300x300.jpg 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-150x150.jpg 150w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-768x768.jpg 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-12x12.jpg 12w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-100x100.jpg 100w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-228x228.jpg 228w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-114x114.jpg 114w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-224x224.jpg 224w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-112x112.jpg 112w\" decoding=\"async\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo.jpg\" class=\"aligncenter wp-image-4082 size-full lazyload\" style=\"display: block; width: 100%; max-width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"MKR micro radius grooving bars product detail\"   title=\"\"  sizes=\"(max-width: 800px) 100vw, 800px\" \/><noscript><img decoding=\"async\" class=\"aligncenter wp-image-4082 size-full\" style=\"display: block; width: 100%; max-width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo.jpg\" alt=\"MKR micro radius grooving bars product detail\" width=\"800\" height=\"800\" title=\"\" srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo.jpg 800w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-300x300.jpg 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-150x150.jpg 150w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-768x768.jpg 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-12x12.jpg 12w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-100x100.jpg 100w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-228x228.jpg 228w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-114x114.jpg 114w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-224x224.jpg 224w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo-112x112.jpg 112w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/noscript><img data-srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1.jpg 800w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-300x300.jpg 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-150x150.jpg 150w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-768x768.jpg 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-12x12.jpg 12w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-100x100.jpg 100w\" decoding=\"async\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1.jpg\" class=\"aligncenter wp-image-8702 size-full lazyload\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"MKR Series Solid Carbide Micro Radius Grooving Bars 2pcs\"   title=\"\"  sizes=\"(max-width: 800px) 100vw, 800px\" \/><noscript><img decoding=\"async\" class=\"aligncenter wp-image-8702 size-full\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1.jpg\" alt=\"MKR Series Solid Carbide Micro Radius Grooving Bars 2pcs\" width=\"800\" height=\"800\" title=\"\" srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1.jpg 800w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-300x300.jpg 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-150x150.jpg 150w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-768x768.jpg 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-12x12.jpg 12w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pcs-1-100x100.jpg 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/noscript><\/p>\n<\/div>\n<\/section>\n<p><!-- TOOL STRUCTURE --><\/p>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Tool Geometry &amp; Structure<\/h3>\n<div style=\"display: flex; flex-wrap: wrap; align-items: center; gap: 28px;\">\n<div style=\"flex: 1 1 420px;\">\n<p><img data-srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908.png 1254w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-300x245.png 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-1024x838.png 1024w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-768x628.png 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-15x12.png 15w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-1000x818.png 1000w\" decoding=\"async\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908.png\" class=\"aligncenter wp-image-4086 size-full lazyload\" style=\"display: block; width: 100%; max-width: 100%; height: auto; margin: 0;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"MKR micro radius grooving bar tool structure and model identification\"   title=\"\"  sizes=\"(max-width: 1254px) 100vw, 1254px\" \/><noscript><img decoding=\"async\" class=\"aligncenter wp-image-4086 size-full\" style=\"display: block; width: 100%; max-width: 100%; height: auto; margin: 0;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908.png\" alt=\"MKR micro radius grooving bar tool structure and model identification\" width=\"1254\" height=\"1026\" title=\"\" srcset=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908.png 1254w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-300x245.png 300w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-1024x838.png 1024w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-768x628.png 768w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-15x12.png 15w, https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-tool-structure-e1789743414908-1000x818.png 1000w\" sizes=\"(max-width: 1254px) 100vw, 1254px\" \/><\/noscript><\/p>\n<\/div>\n<div style=\"flex: 1 1 420px;\">\n<p style=\"margin: 0 0 14px; color: #475569; font-size: 14px; line-height: 1.7;\">The cutting head uses a full-radius profile in which the standard groove width is twice the specified radius. For example, an R0.5 tool produces a nominal 1.0 mm groove width, while an R1.0 tool produces a nominal 2.0 mm groove width.<\/p>\n<p style=\"margin: 0; color: #475569; font-size: 14px; line-height: 1.7;\">Select the working length according to groove position and use the shortest model that can reach the feature. This improves rigidity and helps reduce vibration, tool deflection and profile variation.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<div style=\"font-family: Arial,Helvetica,sans-serif; color: #2f2938; line-height: 1.65; box-sizing: border-box;\">\n<div style=\"display: block !important; height: auto !important; min-height: 0 !important; margin: 6px 0 12px 0 !important; padding: 0 !important; color: #475569 !important; font-size: 15px !important; font-weight: 400 !important; line-height: 1.5 !important;\">Solid carbide MKR micro radius grooving bars for machining full-radius internal grooves and smooth relief profiles in small bores. Standard radii from R0.3 to R1.0 and multiple working lengths are available, with custom dimensions, OEM marking and private-label support for distributors.<\/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;\">Substrate:<\/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;\">Fine-Grain Solid Carbide<\/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;\">Tipo di utensile:<\/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;\">Micro Internal Radius Grooving Bar<\/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;\">Series:<\/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;\">\u00a0MKR<br \/>\n<\/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;\">Raggio d'azione:<\/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;\">R0.3\u2013R1.0 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; 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;\">Minimum Bore:<\/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;\">\u00d84.1 \/ \u00d85.1 \/ \u00d86.1 \/ \u00d88.1 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;\">Shank Diameter:<\/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;\">\u00d84 \/ \u00d85 \/ \u00d86 \/ \u00d88 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;\">Working 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;\">10 \/ 15 \/ 22 \/ 30 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;\">Custom Options:<\/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;\">Radius \/ Dimensions \/ Coating \/ Marking<\/span><\/div>\n<\/div>\n<\/div>\n<div style=\"display: flex !important; flex-wrap: wrap !important; gap: 6px !important; width: 100% !important; margin: 0 !important; padding: 0 !important; box-sizing: border-box !important;\">\n<div style=\"flex: 1 1 105px !important; min-width: 0 !important; margin: 0 !important; padding: 8px 9px !important; background: #EEF8F1 !important; border-radius: 4px !important; box-sizing: border-box !important;\"><span style=\"display: block !important; margin: 0 0 2px !important; color: #0f766e !important; font-size: 12px !important; font-weight: 700 !important; line-height: 1.3 !important;\">Standard Dispatch<\/span><span style=\"display: block !important; color: #1e293b !important; font-size: 13px !important; font-weight: 700 !important; line-height: 1.35 !important;\">1\u20133 Working Days<\/span><\/div>\n<div style=\"flex: 1 1 105px !important; min-width: 0 !important; margin: 0 !important; padding: 8px 9px !important; background: #EEF8F1 !important; border-radius: 4px !important; box-sizing: border-box !important;\"><span style=\"display: block !important; margin: 0 0 2px !important; color: #0f766e !important; font-size: 12px !important; font-weight: 700 !important; line-height: 1.3 !important;\">OEM &amp; Custom<\/span><span style=\"display: block !important; color: #1e293b !important; font-size: 13px !important; font-weight: 700 !important; line-height: 1.35 !important;\">Drawings \/ Samples<\/span><\/div>\n<div style=\"flex: 1 1 105px !important; min-width: 0 !important; margin: 0 !important; padding: 8px 9px !important; background: #EEF8F1 !important; border-radius: 4px !important; box-sizing: border-box !important;\"><span style=\"display: block !important; margin: 0 0 2px !important; color: #0f766e !important; font-size: 12px !important; font-weight: 700 !important; line-height: 1.3 !important;\">Ordine minimo<\/span><span style=\"display: block !important; color: #1e293b !important; font-size: 13px !important; font-weight: 700 !important; line-height: 1.35 !important;\">MOQ 10 Pieces<\/span><\/div>\n<\/div>\n<\/div>","protected":false},"featured_media":4082,"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":[2615,3684],"product_tag":[4992,4993,3941,4991],"class_list":["post-4044","product","type-product","status-publish","has-post-thumbnail","product_cat-micro-internal-tooling","product_cat-micro-internal-grooving-bars","product_tag-grooving-bar","product_tag-internal-grooving-bar","product_tag-micro-internal-grooving-bar","product_tag-micro-internal-tool","pa_workpiece-material-carbon-alloy-steel","pa_workpiece-material-hardened-mold-steel","pa_workpiece-material-stainless-steel","first","instock","shipping-taxable","product-type-simple","entry","content-bg","loop-entry"],"acf":[],"taxonomy_info":{"product_cat":[{"value":2615,"label":"Micro Internal Tooling"},{"value":3684,"label":"Micro Internal Grooving Bars"}],"product_tag":[{"value":4992,"label":"grooving bar"},{"value":4993,"label":"internal grooving bar"},{"value":3941,"label":"micro internal grooving bar"},{"value":4991,"label":"micro internal tool"}],"pa_workpiece-material":[{"value":3617,"label":"Carbon &amp; Alloy Steel"},{"value":3620,"label":"Hardened &amp; Mold Steel"},{"value":3618,"label":"Stainless Steel"}]},"featured_image_src_large":["https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/08\/MKR-Series-Solid-Carbide-Micro-Radius-Grooving-Bars-2pc-photo.jpg",800,800,false],"author_info":[],"comment_info":"","_links":{"self":[{"href":"https:\/\/hycuttingtools.com\/it\/wp-json\/wp\/v2\/product\/4044","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hycuttingtools.com\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hycuttingtools.com\/it\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hycuttingtools.com\/it\/wp-json\/wp\/v2\/media\/4082"}],"wp:attachment":[{"href":"https:\/\/hycuttingtools.com\/it\/wp-json\/wp\/v2\/media?parent=4044"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hycuttingtools.com\/it\/wp-json\/wp\/v2\/product_brand?post=4044"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hycuttingtools.com\/it\/wp-json\/wp\/v2\/product_cat?post=4044"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hycuttingtools.com\/it\/wp-json\/wp\/v2\/product_tag?post=4044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}