Hertel E299914042 Square End Mill 1.5 in 6 Flute Cobalt

Product Description

The HERTEL E299914042 is a 6-flute cobalt square end mill designed for milling ferrous and difficult-to-machine materials in machining centers and manual mills. Built from M42 cobalt high-speed steel, it offers superior heat and wear resistance compared to standard M2 HSS tooling. The cutter measures 1.5 inches in diameter with a 2-inch length of cut and a 0.75-inch shank diameter, giving it a rigid setup suited for full-width slotting and peripheral milling passes. At 4.375 inches overall length on a regular-length profile, it fits standard tool holders without extended-reach clearance concerns. Uncoated finish makes it easy to resharpen on a standard tool grinder.

This end mill is used in job shop and production environments for side milling, slotting, and profiling in steel, stainless steel, cast iron, and high-temperature alloys. The 30-degree right-hand spiral flute geometry promotes efficient chip evacuation and smooth cutting action. Its centercutting capability allows direct plunge entry into the workpiece without a pre-drilled pilot hole, which is useful in die and mold work as well as general production machining. Installation is handled by machinists and CNC setup technicians using standard ER, CAT, or BT tool holders sized for a 0.75-inch shank.

Key Features

• 6-flute design increases feed rate capability and improves surface finish on finishing passes
• M42 cobalt construction resists heat buildup in interrupted cuts and harder alloys
• 30-degree right-hand helix promotes upward chip flow and reduces re-cutting
• Centercutting geometry allows direct plunge milling without a pilot hole
• Uncoated surface allows straightforward resharpening to extend tool life
• Regular length profile fits standard tool holders without extended-reach adapters

Compatibility

Designed as an OEM-style replacement or direct-use cutting tool for machining centers and manual knee mills accepting a 0.75-inch straight shank end mill.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Always power down and lock out the spindle drive before changing tooling. Seat the shank fully in the collet or end mill holder and torque the retention mechanism according to the holder manufacturer's specification. Verify runout with a dial indicator before initiating a cut, particularly for finishing operations where surface finish tolerance is critical.