Description

The SECO 17011879 is a single-end square end mill manufactured from M42 cobalt high-speed steel, designed for material removal in milling operations on machining centers and manual mills. It features a 1.25-inch cutting diameter, a 6-inch length of cut, and 6 spiral flutes with a 30-degree helix angle. The bright uncoated finish suits applications where coating adhesion is unnecessary or where regrinding is anticipated. This tool is installed and operated by machinists and toolroom technicians in production and job-shop environments.

The 17011879 is built for milling steel, stainless steel, cast iron, aluminum and non-ferrous metals, and high-temperature alloys, covering ISO material groups P, M, K, N, and S. Its 8.5-inch overall length and 1.25-inch shank diameter suit deep-reach setups where standard-length tooling falls short. The centercutting geometry allows plunge entry in addition to conventional peripheral and slot milling. Series SPC408 tooling is commonly selected for heavy-stock and long-reach applications in both roughing and semi-finishing operations.

Key Features

M42 cobalt construction for elevated heat and wear resistance compared to standard M2 HSS
6 spiral flutes at a 30-degree helix angle for efficient chip evacuation and smooth cutting action
Centercutting design allows direct plunge milling without a pre-drilled entry point
Right-hand cut and right-hand flute geometry for standard spindle operation
Bright uncoated finish preserves sharp edge geometry and simplifies regrinding
1.25-inch shank diameter provides rigid toolholder engagement for reduced deflection on long-reach cuts

Compatibility

Designed for use in milling machines and machining centers accepting a 1.25-inch straight shank, series SPC408. Suitable for ISO material groups P, M, K, N, and S as stated in manufacturer specifications.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Before mounting, confirm the toolholder bore is clean and within tolerance to prevent runout beyond the rated 0.0010-inch TIR maximum. Torque the set screw or collet nut to the toolholder manufacturer’s specification. Verify spindle direction is set to right-hand rotation before engaging the cut.