Value Collection 723-6789 Roughing End Mill 7/8 in 5 Flute Cobalt

Product Description

The VALUE COLLECTION 723-6789 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance suited to harder workpiece materials where standard HSS tooling falls short. The 7/8 inch cutting diameter is paired with a TiN (titanium nitride) coating that reduces friction and extends cutting edge life. With 5 flutes and a 3.5 inch length of cut, this tool handles deep passes while maintaining chip clearance. It is installed and operated by machinists and tool-and-die professionals in CNC and manual milling applications.

This roughing end mill is intended for use in vertical milling machines, CNC machining centers, and manual knee mills where rapid stock removal is the priority. The right-hand cutting and right-hand flute direction make it compatible with standard spindle configurations. The 7/8 inch shank diameter matches the cutting diameter, allowing direct collet or end mill holder mounting without reduction sleeves. Typical workpiece materials include alloy steel, tool steel, and stainless steel where cobalt tooling is preferred over carbide for toughness in interrupted cuts.

Key Features

• M42 cobalt construction provides heat resistance and toughness in demanding milling applications
• TiN coating reduces friction and extends tool life on ferrous materials
• 5-flute geometry supports aggressive chip loads with adequate chip evacuation
• 3.5 inch length of cut allows deep-pocket and shoulder milling in a single pass
• Right-hand cut and right-hand flute direction for standard spindle compatibility
• Single-end design; non-centercutting, suited for peripheral and side milling rather than plunge cuts

Compatibility

Designed as an OEM-style replacement or standard tooling option for milling operations requiring a 7/8 inch cobalt roughing end mill with a 7/8 inch shank. Confirm holder bore size, spindle taper, and machine horsepower rating before use.

Installation Notes

Installation is performed by a qualified machinist. Secure the shank in a properly sized collet chuck or end mill holder torqued to the machine manufacturer's specification. This end mill is non-centercutting and should not be used for direct plunge operations without a pilot hole or ramping entry. Confirm spindle RPM and feed rate against published speeds-and-feeds data for cobalt tooling in the target workpiece material before beginning the cut.