Promax 109-01226 Square End Mill 3/16 in 3 Flute Carbide Zrn

Product Description

The PROMAX 109-01226 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. Ground from micrograin carbide stock, this stub-length end mill features a 3/16-inch cutting diameter, a 3/8-inch length of cut, and a 2-inch overall length. The zirconium nitride (ZrN) finish improves surface hardness and heat resistance, extending tool life in ferrous and non-ferrous materials. With three flutes and a 40-degree helix angle, it produces efficient chip evacuation and smooth surface finishes in light to moderate cuts. A right-hand cut, right-hand spiral flute geometry makes it compatible with standard CNC machining centers and manual mills.

This end mill is suited for milling slots, profiles, and pockets in close-tolerance work where a stub overhang is preferred for rigidity. The 3/16-inch shank diameter matches the cutting diameter, making it straightforward to chuck in standard collets or end mill holders. Its stub length classification means reduced deflection compared to longer-reach variants, which is an advantage in tight setups or shallow-depth operations. Machinists working in job shops, toolrooms, or production environments will find this tool appropriate for aluminum, brass, mild steel, and similar materials.

Key Features

• Solid micrograin carbide construction for wear resistance and edge retention
• ZrN coating adds surface hardness and improves heat dissipation at the cutting edge
• 40-degree helix angle promotes efficient chip evacuation and reduces cutting forces
• Stub length design minimizes deflection in shallow milling operations
• Right-hand cut and right-hand spiral flute for use in standard spindle rotation
• 3-flute geometry balances chip clearance with tool strength at small diameters

Compatibility

Designed as a standard shank square end mill for use in CNC machining centers, vertical mills, and manual milling machines equipped with collets or end mill holders accepting a 3/16-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully into the collet or holder and torque the retention mechanism to the tool holder specification. Verify runout with a dial indicator before beginning a cut to confirm proper seating and avoid premature edge wear.