Hertel EF99921250 Square End Mill 3/16 in 2 Flute Hss Ticn

Product Description

The HERTEL EF99921250 is a single-end square end mill designed for precision milling operations in metal and alloy workpieces. It is manufactured from high speed steel (HSS) with a titanium carbonitride (TiCN) coating that improves surface hardness and wear resistance compared to uncoated HSS tooling. The cutter features a 3/16 inch diameter with a 7/16 inch length of cut, a 30-degree helix angle, and two right-hand spiral flutes. It is centercutting, meaning it can be used for plunge milling in addition to peripheral and slot cutting. Machinists and tool-and-die professionals install this end mill in manual mills and CNC machining centers for general-purpose slotting, profiling, and side milling work.

This end mill is suited for light to medium milling in ferrous and non-ferrous metals on both manual knee mills and CNC vertical machining centers. The 3/8 inch shank diameter fits standard ER collet chucks, end mill holders, and Weldon-style holders common in machine shops. With a 2-3/8 inch overall length, it provides adequate reach for typical workholding setups without excessive overhang. The TiCN coating makes it a practical choice for milling alloy steels, stainless steels, and cast iron where tool life is a priority.

Key Features

• 3/16 inch cutting diameter with 7/16 inch length of cut for light milling passes
• TiCN coating increases surface hardness and extends tool life versus uncoated HSS
• 30-degree right-hand helix promotes efficient chip evacuation in ferrous materials
• Centercutting design allows plunge cutting in addition to peripheral milling
• Two flutes provide adequate chip clearance for slotting and profiling operations
• 3/8 inch shank fits standard collet chucks and end mill holders

Compatibility

Designed as a standard replacement or stock end mill for any manual mill or CNC machining center accepting a 3/8 inch shank end mill holder or collet chuck.

Installation Notes

Installation should be performed by a qualified machinist. Ensure the machine spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully into the holder to the recommended minimum engagement depth and torque the set screw or collet nut per the toolholder manufacturer specifications. Inspect the cutting edges and coating for chips or damage before use.