Hertel EF080020 Square End Mill 5/16 in 2 Flute Hss Ticn

Product Description

The HERTEL EF080020 is a two-flute square end mill ground from high speed steel and finished with a titanium carbonitride (TiCN) coating. It measures 5/16 inch (0.3125 inch) in cutting diameter with a 3/8 inch (0.375 inch) shank, a 1-3/8 inch length of cut, and a 3-1/8 inch overall length. The spiral flute geometry runs at a 30-degree helix angle with right-hand cut and right-hand flute orientation. The centercutting design allows plunge entry as well as conventional side milling. Machinists and tool-and-die professionals install this end mill in manual mills and CNC machining centers for general-purpose metal removal operations.

This end mill is suited for milling ferrous and non-ferrous metals in light-to-moderate material removal applications. The TiCN coating improves surface hardness and lubricity over uncoated HSS, extending tool life in production environments. The 3/8 inch shank fits standard R8, ER, and side-lock collet holders common to knee mills and vertical machining centers. It is a single-end tool, meaning the cutting geometry is on one end only. Typical applications include slotting, profiling, and peripheral milling in job shop and maintenance machining settings.

Key Features

• 5/16 inch cutting diameter with 1-3/8 inch length of cut for small-feature milling
• TiCN finish increases coating hardness and wear resistance compared to uncoated HSS
• 30-degree helix angle promotes smooth chip evacuation and reduced cutting forces
• Centercutting geometry allows direct plunge entry without a pre-drilled hole
• Right-hand cut and right-hand spiral flute — standard orientation for most milling setups
• High speed steel construction provides toughness in interrupted cuts and manual machine applications

Compatibility

Designed as a standard single-end square end mill with a 3/8 inch shank, compatible with collet chucks, end mill holders, and side-lock holders sized for 3/8 inch shank tooling on manual knee mills and CNC vertical machining centers.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer's toolholding torque and runout specifications. Power down and lock out the spindle before inserting or removing the end mill from the holder. Verify shank seating depth and collet condition before operation. Always confirm spindle speed and feed rate against HSS tooling guidelines for the workpiece material before cutting.