Hertel E499921152 Square End Mill 3/8 Inch 2 Flute Hss

Product Description

The HERTEL E499921152 is a two-flute, single-end square end mill designed for general-purpose milling operations in ferrous and non-ferrous metals. Built from M42 high speed steel with a Titanium Nitride (TiN) coating, it delivers increased surface hardness and heat resistance compared to uncoated HSS tooling. The 0.375-inch diameter cutter has a 0.5625-inch length of cut, a 0.375-inch straight shank, and a 2.5-inch overall length. The 30-degree right-hand spiral flute geometry promotes efficient chip evacuation and smooth cutting action. Centercutting capability allows direct plunge entry without a pre-drilled pilot hole, adding versatility in milling setups.

This end mill suits light to medium-duty milling on manual mills and CNC machining centers. It is well-suited for slotting, profiling, and shallow pocket operations on steel, aluminum, brass, and cast iron. The two-flute design provides larger chip gullets than higher-flute-count tools, making it a practical choice when chip clearance is the primary concern. It is typically used by machinists and tool-and-die professionals in job shop, maintenance, and production environments.

Key Features

• M42 high speed steel construction for toughness and wear resistance in demanding cuts
• TiN coating increases surface hardness and reduces friction at the cutting edge
• 30-degree right-hand spiral flute promotes efficient chip flow and reduces cutting forces
• Centercutting design allows direct plunge milling without a pilot hole
• Two-flute configuration provides maximum chip clearance for slotting and softer materials
• Single-end configuration with straight 0.375-inch shank for standard collet and end mill holder compatibility

Compatibility

Designed as a standard-shank end mill for use in ER collets, end mill holders, and similar 3/8-inch bore toolholding systems on manual knee mills and CNC machining centers. No specific OEM model compatibility was stated in the product data.

Installation Notes

Installation is performed by machinists or toolroom technicians. Ensure the spindle is fully stopped and locked before inserting or removing the end mill from the holder. Tighten the collet or set screw to the toolholder manufacturer's specification using the appropriate spanner wrench. Inspect the shank and cutting edges for chips or wear before each use, and confirm runout with a dial indicator when tight tolerances are required.