Hertel E2039064 Square End Mill 1 in 4 Flute Cobalt

Product Description

The HERTEL E2039064 is a 1-inch diameter cobalt square end mill designed for general-purpose milling of ferrous and high-temperature alloy materials. Built from M42 cobalt high-speed steel, it delivers toughness and heat resistance in demanding cutting conditions. The 4-flute spiral geometry with a 30-degree helix angle promotes smooth chip evacuation and stable cutting action. With a 2-inch length of cut and 4.5-inch overall length, this is a standard-reach tool suited for slotting, profiling, and peripheral milling operations. A licensed machinist or tool-and-die professional would typically deploy this end mill on manual or CNC milling machines where consistent material removal rates and edge durability are required.

This end mill is appropriate for use in job shop, production machining, and maintenance environments. Its centercutting capability allows direct plunge entry into the workpiece, adding flexibility for interpolated pocket milling without a pre-drilled entry hole. The right-hand cut and right-hand flute configuration is the standard orientation for conventional vertical milling setups. The 1-inch shank diameter matches standard ER or straight-bore collet chucks and end mill holders commonly found in milling operations.

Key Features

• M42 cobalt HSS construction provides elevated heat and wear resistance compared to standard M2 tooling
• 4-flute spiral design with 30-degree helix angle for balanced chip load and surface finish
• Centercutting geometry allows direct plunge milling without a pilot hole
• Right-hand cut, right-hand flute — standard orientation for vertical milling machines
• Uncoated finish suitable for use with cutting fluids or coolant on a wide range of ferrous materials
• Regular length profile with 1-inch shank matches standard end mill holders and collet chucks

Compatibility

Designed as a standard-profile cobalt square end mill compatible with 1-inch straight-bore end mill holders, ER collet chucks, and Weldon-style holders used on vertical and horizontal milling machines.

Installation Notes

Installation should be performed by a qualified machinist familiar with toolholder torque procedures and runout verification. Ensure the milling spindle is fully stopped and the machine is locked out before inserting or removing the tool. Seat the shank fully into the holder and torque set screws or collet nuts per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning production cuts to prevent premature tool wear or workpiece damage.