Seco 17016577 Roughing End Mill 1/4 in 4 Flute Cobalt

Product Description

The SECO 17016577 is a single-end roughing end mill designed for aggressive material removal in milling applications. Built from M42 cobalt high-speed steel and coated with TiCN, it handles tough ferrous and non-ferrous materials while maintaining edge life under heat. The mill diameter is 0.250 inches with a 5/8-inch length of cut and a 3/8-inch shank diameter. Four right-hand spiral flutes with a 30-degree maximum helix angle provide efficient chip evacuation and stable cutting geometry. This tool is center-cutting, allowing for direct plunge entry as well as conventional side milling. It is sold individually and suited for tool crib stocking or single-job procurement.

This roughing end mill fits standard milling machines, CNC machining centers, and manual knee mills where high-material-removal-rate roughing passes are required. The 3/8-inch shank seats in common ER and side-lock toolholders. The TiCN coating improves wear resistance and reduces built-up edge when cutting steels, stainless, and cast iron. The overall length of 2-7/16 inches keeps overhang manageable for rigidity-sensitive setups. Machinists and toolroom technicians installing this tool in production or maintenance environments will find it a direct fit for standard roughing operations without the need for extended-reach or variable-helix geometry.

Key Features

• M42 cobalt HSS construction for elevated heat and wear resistance compared to standard M2 tooling
• TiCN coating reduces friction and extends tool life in ferrous and abrasive materials
• Center-cutting design allows plunge milling and ramping without a pre-drilled entry point
• 4-flute right-hand spiral configuration with 30-degree helix angle for efficient chip flow
• 3/8-inch shank diameter fits common ER collet and side-lock toolholder systems
• SECO REC700 series with tight diameter tolerance of +0.003 to -0.000 inches for consistent fit

Compatibility

Designed as an OEM-style replacement or standard tooling option for milling machines and CNC machining centers accepting a 3/8-inch shank end mill. No specific machine model compatibility was stated in the product data.

Installation Notes

This end mill is installed by a machinist or toolroom technician. Always power down and lock out the spindle before changing tooling. Seat the shank fully and evenly in the collet or toolholder and torque the retention nut to the toolholder manufacturer specification. Verify runout with a dial indicator before beginning the cut, as excessive runout accelerates edge wear on roughing geometry.