Seco 17003409 Corner Radius End Mill 1/4 in 3 Flute Altin

Product Description

The SECO 17003409 is a solid carbide corner radius end mill designed for precision milling in demanding metalworking applications. It features a 1/4 inch diameter, a 0.0200 inch corner radius, and three right-hand spiral flutes with a 35-degree medium helix angle. The AlTiN PVD coating provides thermal and oxidation resistance, making it well-suited for cutting steel, stainless steel, superalloys, and titanium. With a coarse pitch and centercutting capability, this single-end tool handles both roughing and finishing passes. It belongs to SECO Series S335 and is built to tight tolerances throughout. Licensed machinists and CNC operators working in aerospace, tool-and-die, and precision machining environments are the primary users of this tool.

This end mill is intended for use in CNC machining centers and manual mills equipped with compatible straight-cylindrical shank toolholders. Its 3/4 inch length of cut and 2-1/2 inch overall length make it a standard-reach tool suited for shoulder milling, slotting, and contouring in ferrous and exotic alloy workpieces. Primary material applications include steel (P-class), stainless steel (M-class), and superalloys and titanium (S-class). It operates without coolant through the body, so external coolant or flood coolant strategies are typical in production setups.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• AlTiN PVD coating rated for high-heat cutting in stainless steel, superalloys, and titanium
• 0.0200 inch corner radius reduces stress concentration and extends tool life at corners
• Three right-hand flutes with 35-degree medium helix for balanced chip evacuation
• Centercutting geometry allows plunge entry without a pre-drilled hole
• Handles both roughing and finishing material removal in a single tool

Compatibility

Designed for use with straight-cylindrical shank toolholders. Compatible with CNC machining centers and milling machines that accept a 1/4 inch shank diameter. Suitable for machining steel, stainless steel, superalloys, and titanium workpiece materials as specified by the manufacturer.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the tool changer or spindle is locked out before loading or removing the end mill. Seat the 1/4 inch straight-cylindrical shank fully and evenly in the toolholder to maintain the specified maximum TIR of 0.0005 inches. Verify runout with a dial indicator before beginning a cut, and confirm appropriate speeds and feeds for the workpiece material and coating type before operation.