{"id":2359,"date":"2026-01-12T13:09:42","date_gmt":"2026-01-12T13:09:42","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&p=2359"},"modified":"2026-09-22T11:20:37","modified_gmt":"2026-09-22T11:20:37","slug":"hrc45-hrc65-4-flute-solid-carbide-corner-radius-end-mill","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/fa\/product\/hrc45-hrc65-4-flute-solid-carbide-corner-radius-end-mill\/","title":{"rendered":"HRC45-HRC65 4-Flute Solid Carbide Corner Radius End Mill for Steel and Mold Steel"},"content":{"rendered":"
\n

<\/p>\n

\n

HRC45\u2013HRC65 4-Flute Solid Carbide Corner Radius End Mill Overview<\/h2>\n

This 4-flute solid carbide corner radius end mill series provides selectable HRC45, HRC55 and HRC65 configurations for carbon steel, alloy steel, tool and mold steel, and confirmed hardened-steel applications. Its reinforced corner radius improves edge strength and reduces chipping risk while retaining a flat-bottom cutting profile. The four-flute geometry supports stable side milling, pocketing, 2D\/3D contouring and semi-finishing, with carbide grade, coating and edge preparation selected according to the workpiece hardness and cutting conditions.<\/p>\n

\n
End Profile<\/span>Corner Radius<\/strong><\/div>\n
Flute Design<\/span>4 Flutes<\/strong><\/div>\n
Hardness Series<\/span>HRC45 \/ HRC55 \/ HRC65<\/strong><\/div>\n
Supply Type<\/span>Standard \/ Custom<\/strong><\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Key Configuration<\/h3>\n
\n
\n

Reinforced Corner Radius<\/h4>\n

The radiused corner reduces local edge stress and chipping risk while maintaining a usable flat-bottom profile.<\/p>\n<\/div>\n

\n

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

Four cutting edges support productive side milling, profiling and semi-finishing with stable engagement.<\/p>\n<\/div>\n

\n

Application-Matched Grade<\/h4>\n

Carbide grade, coating and edge preparation are selected for the confirmed steel hardness and operation.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Key Product Advantages<\/h3>\n
\n
\n
R<\/div>\n

Stronger Corner<\/h4>\n

Improved corner strength compared with a sharp-edge square end mill.<\/p>\n<\/div>\n

\n
4F<\/div>\n

Productive Engagement<\/h4>\n

Four flutes provide more cutting contacts per revolution for stable steel milling.<\/p>\n<\/div>\n

\n
3G<\/div>\n

Three Grade Levels<\/h4>\n

HRC45, HRC55 and HRC65 options cover different hardness and application demands.<\/p>\n<\/div>\n

\n
OEM<\/div>\n

Flexible Configuration<\/h4>\n

Diameter, radius, length, coating and geometry can be reviewed for custom supply.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Recommended Milling Operations<\/h3>\n

The corner-radius profile is particularly useful where a sharp corner is unnecessary and improved tool-edge reliability is preferred.<\/p>\n

\n
Side Milling<\/strong>RECOMMENDED<\/span><\/div>\n
Pocket Milling<\/strong>RECOMMENDED<\/span><\/div>\n
Contour Milling<\/strong>RECOMMENDED<\/span><\/div>\n
Semi-Finishing<\/strong>SUITABLE<\/span><\/div>\n<\/div>\n
Selection Note:<\/strong> Match the corner radius to the part fillet. The cutter cannot produce an internal corner radius smaller than its own R value.<\/div>\n<\/section>\n

<\/p>\n

\n

Workpiece Material Compatibility<\/h3>\n
\n\n\n\n\n\n\n\n
MATERIAL GROUP<\/th>\nEXAMPLES<\/th>\nAPPLICATION LEVEL<\/th>\n<\/tr>\n<\/thead>\n
P Carbon Steel<\/td>\nGeneral carbon and structural steels<\/td>\nPrimary application<\/td>\n<\/tr>\n
P Alloy & Tool Steel<\/td>\nAlloy steel, tool steel and mold steel<\/td>\nConfirm grade and hardness<\/td>\n<\/tr>\n
H Hardened Steel<\/td>\nConfirmed tool, mold and heat-treated steels up to the selected series level<\/td>\nHRC55\/HRC65 review required<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
Series Selection Note:<\/strong> HRC45, HRC55 and HRC65 identify application-oriented grade levels rather than universal machining guarantees. Confirm the workpiece grade, actual hardness, operation and setup before selecting the series.<\/div>\n<\/section>\n

<\/p>\n

\n

Product Details & Milling Demonstration<\/h3>\n
\n
\"Corner