Hertel E1031020 Square End Mill 5/16 in 4 Flute Hss

Product Description

The HERTEL E1031020 is a 4-flute square end mill designed for general-purpose milling operations in a wide range of metalworking applications. Manufactured from M7 High Speed Steel (HSS), this end mill features a 5/16 inch cutting diameter, a 3/4 inch length of cut, and a 3/8 inch shank diameter, with an overall length of 2.5 inches. The spiral flute geometry with a 30-degree helix angle promotes efficient chip evacuation during slotting and peripheral milling. Right-hand cut and right-hand flute orientation follow standard tooling conventions for most vertical and horizontal milling machines.

This end mill is suited for milling steel, aluminum, and other machinable metals in job shop, maintenance, and production environments. The uncoated M7 HSS construction makes it a practical choice for lower-speed conventional milling where carbide tooling is unnecessary or cost-prohibitive. The 3/8 inch shank fits standard ER collets, end mill holders, and Weldon-style tool holders commonly found on knee mills, CNC machining centers, and manual milling machines. Its compact overall length of 2.5 inches provides good rigidity for slotting and profiling cuts.

Key Features

• 5/16 inch cutting diameter with 3/4 inch length of cut for moderate-depth slotting and profiling
• 4-flute spiral geometry with 30-degree helix angle for efficient chip flow
• M7 High Speed Steel construction for durability across a range of machinable materials
• Right-hand cut, right-hand flute configuration matches standard milling setups
• 3/8 inch shank diameter fits common collet and end mill holder systems
• Uncoated finish; compatible with standard cutting fluids and coolant systems

Compatibility

Designed as a standard single-end square end mill for use in any milling machine or machining center that accepts a 3/8 inch shank diameter toolholder.

Installation Notes

Installation should be performed by a qualified machinist following shop-standard toolholding procedures. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill. Seat the shank fully into the collet or holder to the recommended gauge-line depth to minimize runout and tool deflection. Verify spindle speed and feed rate selections against published HSS cutting data for the workpiece material before engaging the cut.