Seco 03083772 Corner Radius End Mill 3/4 in 4 Flute Altin

Product Description

The SECO 03083772 is a solid carbide corner radius end mill engineered for high-performance material removal in demanding machining applications. With a 0.75 inch mill diameter, 0.75 inch length of cut, and a 0.0300 inch corner radius, this single-end tool is built to handle both roughing and finishing passes in a single setup. The 4-flute, right-hand spiral configuration runs at a high helix angle of 40 degrees to improve chip evacuation and reduce heat buildup. An AlTiN PVD coating adds surface hardness and oxidation resistance, extending tool life in abrasive and high-temperature cuts. The micrograin solid carbide substrate supports tight tolerances and consistent edge integrity across the full cutting depth. Licensed machinists and CNC operators in production and job shop environments rely on this geometry for precision slotting, profiling, and contouring.

This end mill is designed for cutting stainless steel, superalloys, titanium, and other hard materials where edge retention and heat resistance are critical. The STR440.2 series targets ISO material groups M, S, and H, making it a practical choice for aerospace, medical, and energy sector component work. The stub length type keeps deflection low during deep-engagement cuts. The straight-cylindrical shank fits standard toolholders used on vertical and horizontal machining centers. The centercutting geometry allows plunge entry, expanding its utility in complex toolpaths without requiring a pre-drilled hole.

Key Features

• 0.0300 inch corner radius reduces stress concentrations and extends tool life at cutting edges
• AlTiN PVD coating provides oxidation resistance and hardness for high-temperature alloy cutting
• 40-degree variable helix promotes efficient chip flow and reduces chatter in hard materials
• Centercutting design supports direct plunge entry without a pilot hole
• Micrograin solid carbide substrate maintains edge sharpness across roughing and finishing operations
• Right-hand flute direction and right-hand cutting geometry compatible with standard CNC spindle rotation

Compatibility

Designed for use with standard cylindrical toolholders accepting a 0.75 inch straight shank. Suitable for ISO workpiece material groups M (stainless steel), S (superalloys and titanium), and H (hard materials) as specified in the STR440.2 series application data.

Installation Notes

This tool is installed by machinists into compatible toolholders on CNC milling machines. Ensure the machine spindle is fully stopped and the tool changer is in a safe state before inserting or removing the end mill. Confirm shank seating depth and runout against the TIR specification before beginning a cut. Do not exceed the rated length of cut when programming axial depth of engagement.