Hertel 750251 Square End Mill 5/8 in 4 Flute Solid Carbide

Product Description

The HERTEL 750251 is a solid carbide square end mill designed for high-performance milling in ferrous and non-ferrous materials. It features a 5/8 inch cutting diameter with a 2-1/4 inch length of cut, making it well-suited for deeper slot, profile, and shoulder milling operations. The AlTiN coating improves heat resistance and tool life in dry or minimal-lubrication cutting environments. A 30-degree helix angle promotes efficient chip evacuation while maintaining smooth cutting action. Micrograin carbide construction delivers edge retention under demanding feeds and speeds. This is a centercutting tool, enabling plunge entry as well as conventional peripheral milling. Machining professionals and tool-and-die shops specify this geometry for precision material removal.

This end mill is intended for use in CNC machining centers, vertical mills, and manual knee mills where a long-reach, 4-flute square end geometry is required. The long length classification with a 5 inch overall length makes it appropriate for workpiece setups requiring extended reach into pockets, slots, or around fixturing. Right-hand cut and right-hand flute configuration is standard for conventional spindle-up milling machines. It is used in job shops, production machining, mold and die work, and general metalworking applications across ferrous alloys and hardened steels where AlTiN coating performance is advantageous.

Key Features

• 5/8 inch cutting diameter with a matching 5/8 inch shank for direct collet or end mill holder fitment
• 2-1/4 inch length of cut suits deep slot and pocket milling operations
• AlTiN finish provides elevated heat resistance for dry machining and hard material applications
• Micrograin solid carbide substrate delivers rigidity and edge retention compared to HSS tooling
• 30-degree spiral flute helix promotes efficient chip flow and reduced cutting forces
• Centercutting design allows direct plunge entry without pre-drilling
• Right-hand cut, right-hand flute configuration compatible with standard CNC and manual spindle rotation

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 5/8 inch collets, end mill holders, and hydraulic chucks used in CNC machining centers and conventional vertical mills. No specific OEM machine compatibility was stated in the product data.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician following the machine tool manufacturer spindle and toolholder torque guidelines. Ensure the spindle is fully stopped and the machine is placed in an appropriate safe state before changing tooling. Verify collet or holder bore diameter matches the 5/8 inch shank before seating. Confirm runout after installation and before cutting to protect both the tool and the workpiece.