Hertel E1039024 Square End Mill 3/8 Inch 4 Flute Hss

Product Description

The HERTEL E1039024 is a 4-flute square end mill designed for general-purpose milling in ferrous and non-ferrous materials. Manufactured from M7 high speed steel and left uncoated, it delivers reliable performance in conventional milling operations without the added cost of a surface treatment. The 3/8-inch cutting diameter pairs with a 3/4-inch length of cut and a 30-degree helix angle, producing efficient chip evacuation and smooth side-wall finishes. At 2-1/2 inches overall length with a matched 3/8-inch shank, this is a standard-reach tool suited for everyday shop and field use by machinists and maintenance technicians.

This end mill is appropriate for slotting, profiling, and peripheral milling on manual mills and CNC machining centers. Its centercutting geometry allows plunge entry, expanding its use to pocketing operations without a pre-drilled pilot hole. The regular-length profile fits standard ER and straight-shank toolholders commonly found in job-shop and MRO environments. Right-hand cut and right-hand spiral flute configuration is compatible with standard spindle rotation on most vertical milling machines.

Key Features

• Centercutting design allows direct plunge entry into the workpiece
• 30-degree helix spiral flute promotes efficient chip flow and reduced cutting heat
• M7 high speed steel grade provides good toughness for interrupted cuts and general-purpose use
• Uncoated finish — suitable for re-sharpening and low-cost replacement applications
• Matched 3/8-inch shank and cutting diameter simplifies toolholder selection
• Right-hand cut and right-hand flute for standard spindle compatibility

Compatibility

Designed as a standard-geometry replacement or direct-fit square end mill for 3/8-inch straight-shank and ER-collet toolholders on vertical milling machines and CNC machining centers.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and the power is locked out before changing tooling. Seat the shank to the minimum recommended engagement depth in the collet or end mill holder and torque the retention mechanism per the toolholder manufacturer specification. Inspect the cutting edges for chips or damage before each use; a damaged edge should not be run.