Hertel E8031903 Square End Mill 1/2 in 4 Flute Hss Tin

Product Description

The HERTEL E8031903 is a 4-flute, single-end square end mill designed for general-purpose milling operations in ferrous and non-ferrous materials. It is manufactured from M7 high speed steel and features a titanium nitride (TiN) coating that extends surface hardness and tool life in production environments. The cutter measures 1/2 inch in diameter with a 1-inch length of cut, a 3/8-inch shank diameter, and an overall length of 2-11/16 inches. The 30-degree helix angle promotes efficient chip evacuation and reduces cutting forces. This tool is installed and operated by machinists and tool-and-die professionals working on manual mills, CNC machining centers, and knee mills.

This end mill is suited for slotting, profiling, and peripheral milling operations in a shop environment. The right-hand cut and right-hand spiral flute geometry is standard for conventional and climb milling on vertical machining centers. The reduced 3/8-inch shank diameter relative to the 1/2-inch cutting diameter allows this tool to reach into pockets or fixtures where a full-diameter shank would interfere. It is not center-cutting and is not designed for plunge entry. Typical applications include roughing and semi-finishing passes in steel, aluminum, brass, and similar machinable alloys.

Key Features

• M7 high speed steel construction for toughness in interrupted cuts and general-purpose milling
• TiN coating improves surface hardness and reduces tool wear at elevated cutting speeds
• 30-degree helix angle promotes chip flow and reduces heat buildup at the cutting edge
• Right-hand cut, right-hand flute spiral geometry compatible with standard spindle rotation
• Reduced 3/8-inch shank allows use in smaller collets and increases reach clearance
• 4-flute design provides a good balance of chip room and surface finish on finishing passes

Compatibility

Designed as a standard shank end mill for use in ER, TG, DA, and similar collet systems accepting a 3/8-inch shank diameter, as well as side-lock and Weldon-flat holders of the same bore size. Not center-cutting — not compatible with plunge-entry operations without a pilot hole or ramping strategy.

Installation Notes

Installation should be performed by a qualified machinist with the machine spindle fully stopped and power locked out before inserting or removing the tool. Ensure the shank is seated to the full recommended engagement depth in the collet or holder to minimize runout and tool pullout risk. Verify collet bore size matches the 3/8-inch shank before tightening. Follow the tool manufacturer and machine builder guidelines for speeds, feeds, and depth of cut — do not exceed the end mill's length-of-cut range of 1 to 1.25 inches.