Hertel E299914109 Square End Mill 7/16 in 4 Flute Cobalt

Product Description

The HERTEL E299914109 is a 4-flute cobalt square end mill designed for milling ferrous and harder work materials in machining centers and manual mills. Built from M42 cobalt high-speed steel, it offers greater heat and wear resistance than standard HSS tooling, making it well suited for interrupted cuts and tougher alloys. The 7/16-inch cutting diameter pairs with a 7/16-inch length of cut and a 3/8-inch shank diameter. Overall length is 2-7/16 inches, placing it in the stub-length category for improved rigidity. The 30-degree helix spiral flute geometry promotes efficient chip evacuation and smooth cutting action across a range of materials.

This end mill is intended for use in general-purpose milling operations including slotting, profiling, and peripheral milling. The stub length and 3/8-inch shank make it a practical choice for setups where overhang must be minimized to reduce vibration and deflection. It is uncoated, which allows for easy regrinding and is appropriate for use with cutting fluids in ferrous material applications. Machinist and toolroom technicians in production and job-shop environments are the primary users of this tool.

Key Features

• M42 cobalt construction for improved hardness and heat resistance over standard HSS
• 4-flute spiral design with 30-degree helix angle for efficient chip removal
• Centercutting geometry enables plunge milling capability
• Right-hand cut and right-hand flute configuration for standard spindle rotation
• Stub length (2-7/16 inches OAL) maximizes rigidity and reduces deflection
• Uncoated finish suitable for regrinding and use with cutting fluids

Compatibility

Designed as a direct-fit replacement for standard 3/8-inch shank collets and end mill holders used in vertical machining centers, knee mills, and CNC milling machines requiring a 7/16-inch diameter square end mill.

Installation Notes

Installation is performed by machinists using a compatible collet, end mill holder, or set-screw adapter sized for a 3/8-inch shank. Ensure the spindle is fully stopped and machine power is locked out before changing tooling. Verify runout with a dial indicator after seating the tool to confirm proper alignment. Follow the machine manufacturer and tooling manufacturer guidelines for speeds and feeds appropriate to the work material.