Seco 17011654 Square End Mill 3/4 in 2 Flute Cobalt

Product Description

The SECO 17011654 is a cobalt square end mill designed for material removal in demanding machining operations. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention when cutting steel, stainless steel, cast iron, and high-temperature alloys. The tool features a 0.75 inch cutting diameter, a 1.3125 inch length of cut, and a 3.5625 inch overall length. The bright, uncoated finish suits applications where coating compatibility is a concern or where regrinding is planned. This is a single-end, centercutting design, meaning it can be used for plunging as well as peripheral and slot milling. It is installed and used by machinists and tool-and-die professionals in job shops and production environments.

This end mill is suited for milling steel, stainless steel, cast iron, and high-temperature alloys in short-reach applications. The SP205 series targets general-purpose machining where cobalt tooling outperforms standard HSS but a carbide tool is not required or preferred. The 0.75 inch shank diameter fits standard milling collets, end mill holders, and Weldon-style tool holders commonly found in knee mills, CNC machining centers, and manual bridgeport-style machines. The 30-degree right-hand spiral flute promotes efficient chip evacuation in these material groups.

Key Features

• M42 cobalt construction provides higher red hardness than standard M2 HSS for extended tool life in tough materials
• Centercutting geometry allows direct plunge entry without a pre-drilled hole
• Right-hand cut and right-hand spiral flute with 30-degree helix angle for positive chip flow
• Bright uncoated finish compatible with regrinding services and soluble coolant systems
• Short length type reduces deflection in standard-depth slot and pocket work
• 2-flute configuration provides larger chip gullets for better chip clearance in ferrous and high-temp alloy cuts

Compatibility

Designed as an OEM-style replacement or direct-use tooling for milling operations requiring a 0.75 inch diameter, 2-flute cobalt square end mill with a 0.75 inch shank. Fits standard 3/4 inch end mill holders, collet chucks, and Weldon-flat holders used in manual and CNC milling equipment.

Installation Notes

This tool is installed by machinists using standard end mill holders or collet systems; verify holder runout before use, as the specified TIR maximum is 0.0010 inches. Power down and lock out the spindle before changing tooling in accordance with shop safety procedures. Do not exceed the recommended depth of cut or feed rate for the workpiece material and machine horsepower rating. Secure the shank fully within the holder to the minimum engagement depth specified by the holder manufacturer to prevent pullout.