Hertel E299921166 Square End Mill 13/32 in 4 Flute Cobalt

Product Description

The HERTEL E299921166 is a 4-flute cobalt square end mill designed for general-purpose milling, slotting, and profiling in ferrous and high-strength materials. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention in demanding cutting conditions. The 30-degree helix angle promotes smooth chip evacuation and reduced cutting forces. The bright, uncoated finish makes it a practical choice for applications where coating compatibility is a concern. With a 13/32-inch cutting diameter and a 1-3/4-inch length of cut, this end mill suits a wide range of side milling and plunging operations. Machinists and tool and die professionals use this type of end mill in manual and CNC milling applications.

This end mill is suited for use in job shops, tool rooms, and production environments where cobalt tooling is specified over carbide for toughness and regrindability. The centercutting geometry allows direct plunge entry into the workpiece without a pre-drilled hole, expanding its versatility for pocket milling and die work. The 3/8-inch shank diameter fits standard milling chucks, collet holders, and end mill adapters commonly found in vertical and horizontal milling machines.

Key Features

• M42 cobalt high-speed steel construction for heat and wear resistance
• 4 right-hand spiral flutes with a 30-degree helix angle for efficient chip evacuation
• Centercutting design allows direct plunge milling without pre-drilling
• Bright, uncoated finish suitable for a broad range of ferrous materials
• Right-hand cutting direction compatible with standard milling spindle rotation
• 3/8-inch shank diameter fits widely available collet and chuck systems

Compatibility

Designed as an OEM-style replacement and standard tooling option for vertical and horizontal milling machines accepting a 3/8-inch shank end mill holder or collet.

Installation Notes

Installation should be performed by a qualified machinist or toolroom professional. Secure the shank fully within the collet or end mill holder to the manufacturer-specified engagement depth before tightening. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool. Verify runout with a dial indicator after seating to minimize premature edge wear.