Hertel E499915669 Square End Mill 1/4in 3 Flute Cobalt

Product Description

The HERTEL E499915669 is a square end mill designed for general-purpose milling operations in a wide range of metalworking applications. Built from cobalt high-speed steel, it delivers added heat and wear resistance compared to standard HSS tooling, making it suitable for tougher materials and higher cutting speeds. The 0.25-inch cutting diameter pairs with a 1.25-inch length of cut and a 0.375-inch shank diameter. Overall length is 3.125 inches. The titanium nitride (TiN) coating further extends tool life by reducing friction at the cutting edge. Licensed machinists and CNC operators rely on this geometry for slotting, profiling, and peripheral milling on ferrous and non-ferrous workpieces.

This end mill is suited for use in vertical machining centers, knee mills, and manual milling machines where a standard-reach, single-end tool is appropriate. The coarse pitch, 3-flute configuration provides good chip clearance during slotting and plunge operations. A 25-degree helix angle balances cutting pressure and surface finish. Right-hand cut and right-hand flute geometry are standard for conventional spindle-direction setups. It is a regular-length design intended for shop-floor production and maintenance machining work.

Key Features

• Cobalt substrate for improved heat resistance over standard HSS
• TiN coating reduces friction and extends cutting edge life
• 3-flute, coarse-pitch design promotes chip evacuation in slotting cuts
• 25-degree helix angle balances cutting forces and surface finish quality
• Right-hand cut, right-hand flute for standard spindle direction use
• Single-end configuration with 0.375-inch shank for common collet and end mill holder setups

Compatibility

Designed as a standard single-end square end mill compatible with 0.375-inch bore end mill holders, collet chucks, and side-lock holders used in vertical and horizontal milling machines and machining centers.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and locked out before inserting or removing the tool from any holder. Verify shank engagement depth meets the holder manufacturer's minimum specification before tightening. Inspect the cutting edges and TiN coating for wear or chipping before each use; a damaged edge can cause workpiece deflection or tool breakage.