Hertel E299914117 Square End Mill 5/32 in 4 Flute Cobalt

Product Description

The HERTEL E299914117 is a cobalt square end mill designed for precision milling operations in ferrous and high-temperature alloy materials. Built from M42 cobalt high-speed steel, this tool offers superior heat and wear resistance compared to standard M2 HSS tooling. The 4-flute, spiral-flute geometry with a 30-degree helix angle promotes efficient chip evacuation while delivering a smooth surface finish. At 0.1563 inches in diameter with a 0.75-inch length of cut, this is a long-reach end mill suited for slotting, profiling, and peripheral milling where extended reach is required. It is centercutting, allowing plunge entry without a pre-drilled hole.

This end mill is appropriate for use in manual knee mills, CNC machining centers, and knee-type vertical mills across job shops, maintenance facilities, and production environments. The 3/8-inch shank diameter is compatible with standard ER collet chucks and end mill holders. The uncoated finish makes it well suited for use with cutting fluid in steels, tool steels, cast iron, and certain stainless steel alloys. Right-hand cut and right-hand flute configuration aligns with conventional spindle rotation on standard vertical machining setups.

Key Features

• M42 cobalt HSS construction for increased red hardness and wear resistance over standard HSS
• 30-degree helix angle with spiral flute geometry for smooth cutting action and effective chip removal
• Centercutting design allows direct plunge entry into workpiece material
• Long-length classification with 0.75-inch length of cut for deeper slot and profile work
• 4-flute configuration balances material removal rate with chip clearance
• Uncoated surface compatible with flood coolant and cutting oil applications

Compatibility

Designed as an OEM-style replacement or direct-fit tooling option for standard 3/8-inch collet chucks and end mill holders used in vertical machining centers and manual milling machines.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank to the full recommended engagement depth in the collet or tool holder and torque the retention nut to the tool holder specification. Inspect the cutting edges for chips or damage before each use, as cobalt tooling can be brittle if mishandled during storage or setup.