Hertel EF99921315 Square End Mill 1/8 in 2 Flute Hss Ticn

Product Description

The HERTEL EF99921315 is a double-end square end mill designed for precision milling operations in a wide range of metalworking applications. Manufactured from high speed steel with a titanium carbonitride (TiCN) finish, this tool delivers extended wear resistance and improved lubricity compared to uncoated HSS tooling. The 1/8 inch cutting diameter and 3/16 inch length of cut make it well suited for fine detail work, slotting, and profiling in both ferrous and non-ferrous materials. With a 30-degree helix angle and spiral flute geometry, it promotes efficient chip evacuation and smooth cutting action. The double-end configuration provides two usable cutting ends, extending tool life between replacements.

This end mill is intended for use in manual milling machines, CNC machining centers, and drill press setups where small-diameter precision cutting is required. The 3/8 inch shank diameter fits standard collets and end mill holders commonly found in light to medium-duty machining environments. Right-hand cut and right-hand flute orientation are standard for conventional and climb milling. The center-cutting capability allows plunge entry directly into workpiece material without pre-drilling. Typical users include machinists, toolmakers, and CNC operators working in job shops, maintenance environments, or production facilities.

Key Features

• Double-end design provides two cutting ends per tool, reducing per-edge tooling cost
• TiCN coating improves surface hardness and wear resistance over uncoated HSS
• 30-degree helix angle with spiral flute geometry promotes efficient chip evacuation
• Center-cutting geometry allows direct plunge entry into workpiece material
• Right-hand cut and right-hand flute for standard milling setups
• 2-flute configuration provides good chip clearance in softer materials and narrow slots

Compatibility

Designed for use with standard 3/8 inch collets and end mill holders on manual mills and CNC machining centers. Compatible with milling setups requiring a 1/8 inch cutting diameter in high speed steel tooling.

Installation Notes

Installation should be performed by a qualified machinist following shop-standard tool change procedures. Ensure the spindle is fully stopped and the machine is powered down or locked out before changing tooling. Seat the shank fully in the collet or holder and torque the retention mechanism per the machine manufacturer's specification. Verify runout with a dial indicator before beginning cuts, particularly at small diameters where runout has an outsized effect on tool life and finish quality.