Hertel E799921149 Square End Mill 1/4 in 2 Flute Hss Ticn

Product Description

The HERTEL E799921149 is a two-flute square end mill designed for general-purpose milling in ferrous and non-ferrous materials. Built from high speed steel (HSS) with a titanium carbonitride (TiCN) finish, it delivers improved wear resistance and surface hardness compared to uncoated HSS tooling. The 0.25-inch cutting diameter and 0.5-inch length of cut suit slotting, profiling, and peripheral milling operations on manual mills and CNC machining centers. The 30-degree helix angle and spiral flute geometry promote efficient chip evacuation. This is a single-end, centercutting tool, meaning it can plunge directly into the workpiece as well as cut laterally.

This end mill is suited for job shops, toolrooms, and production environments where HSS tooling is preferred over carbide for interrupted cuts or setups with vibration. The 0.375-inch shank diameter accommodates standard ER collet chucks and end mill holders commonly found on vertical milling machines and VMCs. The 2.4375-inch overall length keeps the tool compact for rigidity in typical shallow-to-medium-depth milling applications. Right-hand cut and right-hand flute configuration is standard for conventional spindle rotation.

Key Features

• TiCN coating increases surface hardness and wear resistance over bare HSS
• Centercutting design allows direct plunge entry without pre-drilling
• 30-degree helix angle promotes smooth chip flow and reduced cutting forces
• Spiral flute geometry suits slotting, profiling, and side milling
• Right-hand cut and right-hand flute for standard spindle direction
• Single-end configuration with 0.375-inch shank for secure tool holding

Compatibility

Designed for use in standard end mill holders, ER collet chucks, and Weldon-style holders accepting a 0.375-inch shank diameter. Suitable for vertical milling machines, knee mills, and CNC machining centers.

Installation Notes

A licensed machinist or qualified toolroom technician should install and set this end mill. Power down and lock out the spindle drive before inserting or changing tooling. Ensure the shank is fully seated and the set screw or collet is torqued to the tool holder manufacturer specification. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates edge wear on HSS tooling.