Hertel 41120536 Roughing End Mill 5/8 in 4 Flute Cobalt

Product Description

The HERTEL 41120536 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a bright, uncoated finish, it delivers the heat and wear resistance required for demanding cuts in alloy steels, tool steels, and other difficult-to-machine materials. The cutter measures 0.625 inches in diameter with a 2.5-inch length of cut and a 4-flute configuration that balances chip evacuation with cutting rigidity. It is centercutting, allowing plunge entry without a pre-drilled pilot hole. The right-hand cutting and right-hand flute geometry are standard for conventional milling machine spindles. Overall length is 4.625 inches.

This end mill is suited for roughing passes on manual mills and CNC machining centers in job shops, maintenance departments, and production environments. The regular-length profile fits standard tool holders without extended reach requirements. Its cobalt construction makes it a practical choice when carbide tooling is not warranted or when machining interrupted cuts where carbide may chip. The 5/8-inch shank diameter matches the mill diameter, simplifying collet selection.

Key Features

• M42 cobalt construction for elevated heat resistance during aggressive roughing cuts
• 4-flute single-end design balances chip clearance and core strength
• Centercutting geometry enables direct plunge milling without pilot drilling
• Right-hand cut and right-hand flute direction for standard spindle compatibility
• Bright, uncoated finish suitable for use with cutting fluid or dry in appropriate materials
• Regular-length profile fits standard ER and end mill holders without extended reach adapters

Compatibility

Designed as an OEM-style replacement or direct substitute for 5/8-inch 4-flute single-end cobalt roughing end mills used in standard vertical and horizontal milling applications.

Installation Notes

Installation is performed by machinists and tooling technicians. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully in the collet or end mill holder and torque the retention nut or set screw according to the tool holder manufacturer's specification. Verify runout with a dial indicator before beginning the cut.