Hertel E2036016 Square End Mill 0.25in 4 Flute Cobalt

Product Description

The HERTEL E2036016 is a cobalt square end mill designed for milling operations in ferrous and difficult-to-machine materials. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance beyond standard HSS tooling, making it suitable for stainless steel, hardened alloys, and tough forgings. The mill features a 0.25-inch cutting diameter, 4 flutes for improved finish and chip evacuation, and a 30-degree right-hand spiral helix. With an extra-long 1.75-inch length of cut and 3.5625-inch overall length, it reaches into deeper pockets and slots where standard-length end mills fall short. Delivered uncoated and ready to run.

This end mill is suited for production and job shop environments where operators are profiling, slotting, and pocketing in materials that generate high cutting temperatures. The 0.375-inch shank diameter mounts into standard end mill holders, collet chucks, and Weldon-style holders used on vertical machining centers and manual knee mills. The extra-long configuration is particularly useful for deep-pocket work and extended-reach applications where a standard-length tool cannot engage the full feature depth. This is a non-centercutting tool and is not intended for direct plunge entry.

Key Features

• M42 cobalt HSS construction resists heat buildup in tough and abrasive workpiece materials
• 4 right-hand spiral flutes with 30-degree helix angle for efficient chip flow and surface finish
• Extra-long 1.75-inch length of cut for deep slots and pockets
• 0.375-inch shank diameter fits standard collet and end mill holder tooling
• Uncoated finish suitable for use with cutting fluids or dry cutting depending on application
• Non-centercutting geometry — ramp or helical entry required, not direct plunge

Compatibility

Designed as an OEM-style replacement or direct-application solid end mill for vertical machining centers, CNC mills, and manual knee mills accepting a 0.375-inch round shank in standard collet chucks or end mill holders.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before mounting or removing tooling. Secure the 0.375-inch shank fully within the holder to the recommended gauge-line depth to minimize runout and tool deflection. Because this is a non-centercutting end mill, program a ramp or helical entry toolpath — do not plunge directly into solid stock.