Seco 17010387 Roughing End Mill 0.75 in 4 Flute Cobalt

Product Description

The SECO 17010387 is a single-end cobalt roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel, it delivers the heat and wear resistance required for interrupted cuts and harder workpiece materials. The 0.75-inch mill diameter pairs with a 0.75-inch length of cut and a right-hand spiral flute geometry with a 30-degree maximum helix angle. Four flutes and a bright uncoated finish make this tool well suited to shops that need a reliable, general-purpose rougher without a specialty coating. Machinists and toolroom professionals install and operate this end mill in standard vertical and horizontal milling setups.

This end mill fits standard milling applications where roughing passes are required before finishing. The 0.75-inch shank diameter seats in conventional collet chucks or end mill holders commonly found on knee mills, CNC machining centers, and manual milling machines. Its regular-length profile and single-end construction make it a straightforward drop-in for shops running the REM445 series or equivalent cobalt roughers. The non-centercutting geometry means it is intended for peripheral and side milling, not direct plunging.

Key Features

• M42 cobalt high-speed steel construction for improved heat and wear resistance over standard HSS
• 4-flute, right-hand spiral configuration with 30-degree maximum helix angle for efficient chip evacuation
• Bright uncoated finish — no coating buildup to affect tolerances in close-fit applications
• Single-end design with 0.75-inch length of cut and 3-inch overall length
• Non-centercutting geometry optimized for side and peripheral milling passes
• Shank diameter tolerance of -0.0001 to -0.0005 inches for consistent tool holder fit

Compatibility

Designed as an OEM-style replacement or direct-use roughing end mill for applications requiring a 0.75-inch cobalt single-end rougher; part of the SECO REM445 series.

Installation Notes

A licensed machinist or qualified toolroom operator should mount this end mill in a properly sized collet chuck or end mill holder rated for the shank diameter. Confirm the machine spindle is fully stopped and locked before tool changes. Verify runout with a dial indicator after seating to ensure the mill diameter tolerance is maintained. Non-centercutting geometry requires a pre-drilled or pre-milled entry point — do not plunge directly into solid material.