Seco 17011707 Square End Mill 0.25in 4 Flute Cobalt

Product Description

The SECO 17011707 is a single-end cobalt square end mill designed for material removal in milling operations on steel, stainless steel, cast iron, aluminum and non-ferrous metals, and high-temperature alloys. Ground from M42 cobalt high-speed steel, this tool delivers heat and wear resistance suited to demanding cutting conditions without a coating. It runs a 0.25 inch cutting diameter with a 0.625 inch length of cut, a 30-degree helix angle, and four spiral flutes in a right-hand cut, right-hand flute configuration. Centercutting geometry allows plunge entry, expanding its range of milling applications. Licensed machinists and toolroom operators are the primary users of this end mill in production and maintenance environments.

The 17011707 fits standard milling machines, knee mills, CNC machining centers, and manual toolroom machines. Its 0.375 inch shank diameter seats in collet chucks, side-lock holders, and shrink-fit holders sized for 3/8 inch shanks. The 2.4375 inch overall length keeps overhang manageable for general-purpose slot milling, peripheral milling, and plunge cutting. Primary workpiece materials include steel (P), stainless steel (M), cast iron (K), aluminum and non-ferrous (N), and high-temperature alloys (S). No extended reach geometry is present, making it best suited to shallow-to-moderate depth setups where rigidity is a priority.

Key Features

• M42 cobalt HSS construction provides heat resistance for harder workpiece materials
• Bright/uncoated finish — no coating buildup risk when cutting aluminum or non-ferrous metals
• Centercutting design allows direct plunge entry without a pre-drilled start hole
• Four-flute spiral configuration balances chip evacuation and surface finish in steel and stainless
• 30-degree helix angle promotes smooth cutting action and reduces chatter on ferrous materials
• Series SPC408 — right-hand cut and right-hand flute for standard spindle rotation

Compatibility

Designed as a direct-fit replacement or standard toolroom end mill for 3/8 inch collet or side-lock toolholders on manual mills and CNC machining centers. Compatible with workpiece materials coded P, M, K, N, and S per the supplier material classification system. No specific machine model or system family compatibility is stated in the product data.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the spindle is fully stopped and locked before inserting or removing the tool from the holder. Seat the shank to the recommended engagement depth in the collet or holder before tightening — avoid gripping within the fluted section. Verify runout against the TIR specification before cutting; maximum TIR for this tool is 0.001 inch.