Robbjack NR-404-16 Square End Mill 0.5 in 4 Flute Carbide

Product Description

The ROBBJACK NR-404-16 is a solid carbide square end mill designed for precision milling in ferrous and non-ferrous metals, plastics, and composites. The tool features a 0.5-inch cutting diameter, a 1-inch length of cut, and a 3-inch overall length with a straight cylindrical 0.5-inch shank. With 4 right-hand spiral flutes at a 30-degree helix angle and a centercutting geometry, this end mill handles both peripheral and plunge cuts. Material grade C2 carbide provides hardness and wear resistance suited to production and maintenance machining environments. Licensed machinists and CNC programmers in job shops, manufacturing facilities, and toolrooms are the primary users.

This end mill fits standard CNC machining centers, knee mills, and manual vertical mills accepting a 0.5-inch straight shank. It is sized for general-purpose slotting, profiling, and pocketing operations at regular length reach. The NR-404 series targets applications where an uncoated solid carbide tool is preferred, including aluminum, brass, mild steel, and similar workpiece materials where regrinding or recoating is part of the tool management program.

Key Features

• Solid carbide construction, material grade C2, for rigidity and edge retention
• 4-flute right-hand cut, right-hand spiral flute configuration at 30-degree helix angle
• Centercutting geometry allows direct plunge entry into workpiece material
• Straight cylindrical 0.5-inch shank fits standard ER collets and end mill holders
• Uncoated finish, compatible with recoating or regrinding service programs
• Regular length designation with 1-inch length of cut and 3-inch overall length for compact, rigid setups

Compatibility

Designed as an OEM-style replacement or direct tooling selection for CNC machining centers and manual mills requiring a 0.5-inch diameter, 4-flute solid carbide square end mill with a straight 0.5-inch shank.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully powered down and locked out before inserting or removing the tool from the holder. Seat the shank fully into the collet or end mill holder and torque the retention mechanism to the tool holder specification. Inspect runout with a dial indicator before beginning the cut to confirm proper seating and avoid premature edge wear.