Seco 17016406 Square End Mill 1/4 in 4 Flute Cobalt Ticn

Product Description

The SECO 17016406 is a single-end cobalt square end mill engineered for material removal in demanding machining applications. Built from M42 cobalt high-speed steel and coated with TiCN (Titanium Carbonitride), this tool delivers improved hardness and wear resistance compared to standard HSS end mills. Key dimensions include a 0.25-inch mill diameter, a 1.25-inch length of cut, a 0.375-inch shank diameter, and a 3.0625-inch overall length. The 4-flute, right-hand spiral configuration with a 30-degree helix angle suits finishing and semi-finishing passes across a wide range of workpiece materials. Licensed machinists and tooling professionals install and operate this tool in CNC mills and manual milling machines.

This end mill is designed for use on steel, stainless steel, cast iron, aluminum and non-ferrous metals, and high-temperature alloys, covering ISO material codes P, M, K, N, and S. The centercutting geometry allows both peripheral and plunge cutting, making it versatile for slotting, profiling, and pocket milling operations. It belongs to the SPC408 series and is sized as a regular-length tool, appropriate for general-purpose milling where extended reach is not required. No coolant-through capability is present, so external flood or mist coolant is recommended when cutting harder materials.

Key Features

• M42 cobalt construction for elevated red-hardness and tool life in ferrous materials
• TiCN coating reduces friction and increases surface hardness at the cutting edge
• 4-flute, right-hand cut and right-hand spiral with 30-degree helix angle
• Centercutting design supports plunge, slot, and profile operations
• Single-end configuration with 0.25-inch diameter and 1.25-inch length of cut
• Regular length classification for stable overhang in standard setups

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC and manual milling machines accepting a 0.375-inch straight shank, across steel, stainless steel, cast iron, aluminum and non-ferrous, and high-temperature alloy workpiece materials per SPC408 series specifications.

Installation Notes

Installation should be performed by a qualified machinist or toolroom professional. Before changing tooling, confirm the spindle is fully stopped and the machine is placed in a safe, locked-out state per applicable shop safety procedures. Secure the shank in a collet or end mill holder to the appropriate holding torque specified by the toolholder manufacturer — do not exceed shank tolerance limits. Verify runout after installation; maximum TIR for this tool is 0.001 inches.