Hertel 2500494 Roughing End Mill 1/4 in 4 Flute Solid Carbide

Product Description

The HERTEL 2500494 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from micrograin solid carbide and coated with titanium nitride (TiN), this tool delivers hardness and surface lubricity suited to demanding cutting applications. The chipbreaker geometry along the 4-flute profile breaks chips into shorter segments, reducing heat buildup and improving chip evacuation in deep cuts. At 0.25 inches in diameter with a 0.5-inch length of cut and 2-inch overall length, this is a compact, rigid tool for slot milling, profiling, and roughing passes in tight setups.

This end mill is used in CNC machining centers and manual knee mills for roughing cuts in ferrous and non-ferrous materials. The right-hand cut and right-hand flute direction are standard for conventional spindle rotation. The centercutting design allows plunge entry, giving machinists flexibility in toolpath programming. Regular length classification makes it a go-to choice for general shop roughing where extended reach is not required. Machinists, tool-and-die makers, and CNC operators in production and job-shop environments are the primary users.

Key Features

• Micrograin solid carbide construction for rigidity and wear resistance
• TiN coating reduces friction and extends tool life in steel and cast iron
• Chipbreaker geometry promotes short chip formation and efficient evacuation
• Centercutting design allows direct plunge milling entry
• 4 flutes with right-hand cut and right-hand helix for standard CNC spindle compatibility
• Shank diameter tolerance of +0.0001 to -0.0004 inches for consistent collet or end mill holder fitment

Compatibility

Designed as a standard 1/4-inch shank roughing end mill compatible with collet chucks, end mill holders, and set-screw adapters accepting a 0.25-inch round shank in CNC machining centers and manual milling machines.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the control is in E-stop or locked out before changing tooling. Seat the shank fully into the holder and torque the retention mechanism per the holder manufacturer specification. Verify runout with a dial indicator before beginning a cut, particularly when operating near the mill diameter tolerance of +0.000 to -0.005 inches.