Hertel GG99914133 Square End Mill 3/4 Inch 4 Flute Hss

Product Description

The HERTEL GG99914133 is a 4-flute square end mill designed for general-purpose milling operations in ferrous and non-ferrous metals. Manufactured from M7 high speed steel, it features a 30-degree helix angle and spiral flute geometry that promotes efficient chip evacuation and smooth cutting action. The centercutting design allows for direct plunge entry into the workpiece. With a 0.75-inch cutting diameter and a 2.25-inch length of cut, this tool handles slotting, profiling, and peripheral milling tasks in standard machining environments. It is sized for use in conventional milling machines, knee mills, and CNC machining centers with compatible toolholders.

This end mill suits job shop, production, and maintenance machining applications where a reliable uncoated HSS tool is preferred over coated carbide alternatives. The right-hand cut and right-hand flute configuration is standard for conventional spindle setups. At 4.5 inches overall length with a 0.75-inch shank diameter, it fits standard ER, Weldon, and side-lock toolholders common in most shops. The regular length classification makes it a practical choice for everyday milling work where extended reach is not required.

Key Features

• M7 high speed steel construction for toughness and edge retention in general milling
• 4 spiral flutes with 30-degree helix angle for balanced cutting forces and chip flow
• Centercutting geometry permits direct plunge milling without a pre-drilled entry hole
• Right-hand cut and right-hand flute orientation for standard spindle direction
• Uncoated finish suitable for use with cutting fluids on a wide range of materials
• Regular length classification provides rigidity for slotting and profiling operations

Compatibility

Designed as a standard replacement or stock tool for 0.75-inch shank toolholders used in conventional and CNC milling machines. No specific OEM or machine model compatibility was provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the spindle is fully stopped and the machine is powered down before loading or changing the tool. Secure the shank fully within the toolholder to the recommended engagement depth per toolholder manufacturer guidelines. Verify runout with a dial indicator before beginning a cut to avoid premature tool wear or dimensional error.