{"id":2022,"date":"2026-01-08T06:56:18","date_gmt":"2026-01-08T06:56:18","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&p=2022"},"modified":"2026-09-11T10:07:34","modified_gmt":"2026-09-11T10:07:34","slug":"hrc55-internal-radius-end-mill-steel","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/ko\/%ec%a0%9c%ed%92%88\/hrc55-internal-radius-end-mill-steel\/","title":{"rendered":"HRC55 4-Flute Solid Carbide Internal-Radius End Mill for Steel"},"content":{"rendered":"
\n

<\/p>\n

\n

HRC55 Carbide Internal-Radius End Mill Overview<\/h2>\n

This HRC55 4-flute solid carbide internal-radius end mill is designed for precision machining of internal corner radii, concave profiles, cavity features and smooth surface transitions in steel components. The precision-ground formed profile allows a defined internal radius to be machined directly, while the 4-flute cutting geometry provides repeated tooth engagement during form milling and finishing operations. Solid carbide construction provides the rigidity required for CNC machining of carbon steel, alloy steel, mold steel and pre-hardened steel applications up to approximately HRC55.<\/p>\n

<\/p>\n

\n
Product Series<\/span>
\nHRC55<\/span><\/div>\n
\ud50c\ub8e8\ud2b8 \uc218<\/span>
\n\ud50c\ub8e8\ud2b8 4\uac1c<\/span><\/div>\n
Radius Range<\/span>
\nR1\u2013R6 mm<\/span><\/div>\n
\uae30\ubcf8 \uc790\ub8cc<\/span>
\nSteel<\/span><\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Internal-Radius Cutting Configuration<\/h3>\n
\n
\n

Precision-Ground Radius Profile<\/h4>\n

The formed cutting profile is ground to a defined radius for machining internal corners, concave features and smooth transitions according to the required component geometry.<\/p>\n<\/div>\n

\n

4-Flute Cutting Geometry<\/h4>\n

Four cutting edges provide repeated tooth engagement during form milling, internal-radius machining and profile-finishing operations.<\/p>\n<\/div>\n

\n

Steel-Oriented Configuration<\/h4>\n

Tool geometry and coating can be selected according to steel grade, workpiece hardness, cutting engagement and required surface condition.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Application-Specific Advantages<\/h3>\n
\n
\n
R<\/div>\n

Defined Radius Geometry<\/h4>\n

Standard R1\u2013R6 configurations cover common internal-radius and concave-profile requirements.<\/p>\n<\/div>\n

\n
4F<\/div>\n

Stable Tooth Engagement<\/h4>\n

The 4-flute configuration supports controlled cutting engagement during form milling and finishing.<\/p>\n<\/div>\n

\n
C<\/div>\n

Solid Carbide Rigidity<\/h4>\n

Solid carbide construction provides a rigid cutting platform for precision CNC radius machining.<\/p>\n<\/div>\n

\n
OEM<\/div>\n

Custom Radius Supply<\/h4>\n

Radius, cutter dimensions, neck geometry, coating and overall length can be reviewed from drawings.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Recommended Machining Operations<\/h3>\n
\n
Internal Radius Milling<\/strong>
\nRECOMMENDED<\/span><\/div>\n
Concave Form Milling<\/strong>
\nRECOMMENDED<\/span><\/div>\n
Cavity Profiling<\/strong>
\nRECOMMENDED<\/span><\/div>\n
Transition Finishing<\/strong>
\nSUITABLE<\/span><\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Workpiece Material Compatibility<\/h3>\n
\n\n\n\n\n\n\n\n\n
MATERIAL GROUP<\/th>\nAPPLICATION<\/th>\nLEVEL<\/th>\n<\/tr>\n<\/thead>\n
P Carbon Steel<\/td>\nInternal-radius and form milling<\/td>\nPrimary<\/td>\n<\/tr>\n
P Alloy Steel<\/td>\nGeometry and coating selected according to grade and hardness<\/td>\nPrimary<\/td>\n<\/tr>\n
P Mold & Tool Steel<\/td>\nMold, die and precision component profiling<\/td>\nRecommended<\/td>\n<\/tr>\n
Pre-Hardened Steel<\/td>\nApplication review recommended for material between 45 and 55 HRC<\/td>\nApplication Review<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"
\n

<\/p>\n

    \n
  • \u25c6<\/span>Standard R1\u2013R6 radius range for internal corner and concave-profile machining<\/li>\n
  • \u25c6<\/span>4-flute geometry supports stable tooth engagement during form milling<\/li>\n
  • \u25c6<\/span>Precision-ground solid carbide profile for consistent internal-radius geometry<\/li>\n
  • \u25c6<\/span>Designed for carbon steel, alloy steel, mold steel and pre-hardened steel up to approximately HRC55<\/li>\n<\/ul>\n

    <\/p>\n

    \uc560\ud50c\ub9ac\ucf00\uc774\uc158: <\/strong>Internal-radius milling, concave form milling, cavity profiling and smooth-transition finishing for mold, die and precision component machining.
    \n<\/span><\/p>\n

    <\/p>\n

    Custom Tool Service: <\/strong>Non-standard radius, cutter dimensions, neck geometry, shank diameter, coating and overall length can be reviewed according to drawings.<\/span>
    \n<\/span><\/p>\n<\/div>","protected":false},"featured_media":2023,"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":[2604,3647],"product_tag":[2693,2729,2670],"class_list":["post-2022","product","type-product","status-publish","has-post-thumbnail","product_cat-solid-carbide-end-mills","product_cat-specialty-end-mills","product_tag-cnc-milling","product_tag-internal-radius-cutter","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":3647,"label":"Specialty End Mills"}],"product_tag":[{"value":2693,"label":"CNC Milling"},{"value":2729,"label":"Internal Radius Cutter"},{"value":2670,"label":"Steel Machining"}],"pa_workpiece-material":[{"value":3617,"label":"Carbon & Alloy Steel"},{"value":3688,"label":"Cast Iron"}]},"featured_image_src_large":["https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/01\/\u4e3b\u56feHigh-Hardness-HRC55-Chamfering-End-Mill-1_\u526f\u672c-1024x1024.webp",1024,1024,true],"author_info":[],"comment_info":"","_links":{"self":[{"href":"https:\/\/hycuttingtools.com\/ko\/wp-json\/wp\/v2\/product\/2022","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hycuttingtools.com\/ko\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hycuttingtools.com\/ko\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hycuttingtools.com\/ko\/wp-json\/wp\/v2\/media\/2023"}],"wp:attachment":[{"href":"https:\/\/hycuttingtools.com\/ko\/wp-json\/wp\/v2\/media?parent=2022"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hycuttingtools.com\/ko\/wp-json\/wp\/v2\/product_brand?post=2022"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hycuttingtools.com\/ko\/wp-json\/wp\/v2\/product_cat?post=2022"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hycuttingtools.com\/ko\/wp-json\/wp\/v2\/product_tag?post=2022"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}