Seco 17016386 Square End Mill 1-1/2 in Cobalt Ticn

Product Description

The SECO 17016386 is a single-end square end mill designed for material removal in ferrous and high-temperature alloy applications. Built from M42 cobalt high-speed steel and coated with TiCN, it delivers improved wear resistance and heat tolerance compared to standard HSS tooling. The cutter measures 1.5 inches in diameter with a 1.625-inch length of cut and a 1.25-inch shank diameter, fitting standard collet chucks and end mill holders. The spiral flute geometry with a 30-degree helix promotes chip evacuation and smooth cutting action. It is centercutting, allowing plunge entry into the workpiece. Machinists and tool and die professionals rely on this geometry for roughing and semi-finishing operations on demanding materials.

The 17016386 is rated for primary workpiece materials including steel, stainless steel, cast iron, and high-temperature alloys, covering ISO material groups P, M, K, and S. The stub-length classification keeps overhang minimal, improving rigidity on knee mills, machining centers, and manual mills. The 4.125-inch overall length suits most standard toolholders. The SP205 series designation places this tool within SECO's cobalt end mill line, intended for shops running conventional or CNC milling equipment where carbide is cost-prohibitive or tool breakage is a concern in interrupted cuts.

Key Features

• M42 cobalt construction for elevated red-hardness and toughness in difficult alloys
• TiCN coating reduces friction and extends tool life on steel and stainless steel
• Centercutting design allows direct plunge milling without a pre-drilled entry hole
• 30-degree helix spiral flute promotes efficient chip evacuation and reduces cutting forces
• Right-hand cut, right-hand flute configuration for standard spindle direction
• Stub-length profile minimizes deflection and improves rigidity at full diameter engagement

Compatibility

Designed for use in standard end mill holders, collet chucks, and Weldon-style holders accepting a 1.25-inch shank diameter. Suited for CNC machining centers and manual knee mills running right-hand spindle rotation. Compatible with steel, stainless steel, cast iron, and high-temperature alloy workpieces per ISO material groups P, M, K, and S.

Installation Notes

A licensed machinist or qualified toolroom technician should install and set this end mill using a calibrated toolholder within runout specification. Verify TIR at the cutting edge does not exceed 0.001 inches before engaging the workpiece. Ensure the machine spindle is fully stopped and power is locked out before changing tooling. Do not exceed the rated depth of cut for the material group being machined, and confirm holder set screw torque meets the toolholder manufacturer specification.