Seco 17006993 Corner Radius End Mill 1/4 in 5 Flute Altin

Product Description

The SECO 17006993 is a solid carbide corner radius end mill engineered for finishing operations in demanding materials. With a 1/4 inch diameter, a 0.0450 inch corner radius, and five flutes in a high-helix spiral configuration, this single-end tool delivers smooth surface finishes and extended tool life in steel, stainless steel, superalloys, titanium, and hard materials. The AlTiN PVD coating adds thermal and wear resistance, making the 17006993 well suited for high-speed machining environments where heat and abrasion accelerate tool wear. It is a right-hand cut, right-hand flute tool with centercutting capability.

This end mill is designed for precision finishing passes on ferrous and exotic alloy workpieces in CNC machining centers and manual mills using standard straight-cylindrical toolholders. The S545R series geometry — with a 45-degree helix, normal pitch, and no chipbreaker — is optimized for achieving tight tolerances on profiled edges and contoured surfaces. It is appropriate for job shops, aerospace shops, and any production environment running steel or titanium components that require consistent corner geometry and low runout.

Key Features

• Solid carbide construction for rigidity and dimensional stability in hard material applications
• AlTiN PVD coating for elevated heat resistance and extended tool life in steel and superalloys
• 0.0450 inch corner radius with a tolerance of plus or minus 0.00100 inch for repeatable edge geometry
• Five-flute high-helix design supports smooth chip evacuation and fine surface finish
• Centercutting geometry allows plunge entry and full-slot milling capability
• Maximum TIR of 0.0005 inch ensures low runout when seated in a precision toolholder
• Right-hand cut and right-hand flute direction — compatible with standard CNC spindle rotation

Compatibility

Designed for use with standard straight-cylindrical toolholders. Intended for machining steel, stainless steel, superalloys, titanium, and hard materials. Part of the SECO S545R series.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine powered down and the spindle fully stopped. Seat the 1/4 inch straight shank fully in the toolholder and torque the retention mechanism per the toolholder manufacturer specifications. Verify runout with a dial indicator before commencing cuts, keeping TIR within the 0.0005 inch maximum. Inspect the cutting edges for chipping or coating wear between operations, especially when running superalloys or hardened steels.