Robbjack NR-204-16 Square End Mill 1/2 in 2 Flute Carbide

Product Description

The ROBBJACK NR-204-16 is a solid carbide square end mill designed for general-purpose milling in a wide range of materials. Measuring 0.5 inches in cutting diameter with a 1-inch length of cut and a 3-inch overall length, this tool delivers precise material removal in both slotting and peripheral milling operations. The two-flute, right-hand spiral geometry with a 30-degree helix angle promotes efficient chip evacuation. The uncoated, centercutting design allows for plunge cuts as well as conventional side milling. It is installed and used by machinists and toolroom operators working on CNC mills and manual vertical mills.

This end mill is suited for use in ferrous and non-ferrous machining applications where a regular-length, straight-shank tool is required. The 0.5-inch straight cylindrical shank fits standard 1/2-inch collets and end mill holders. The NR-204 series is a regular-length line, making it appropriate for general shop work including profiling, contouring, and slotting in production and job-shop environments. No extended reach is built into this tool, so it is best applied where workpiece clearance allows a compact setup.

Key Features

• Solid carbide construction in material grade C2 for rigidity and wear resistance
• Two-flute, right-hand cut and right-hand flute spiral geometry with 30-degree helix angle
• Centercutting design allows plunge entry without a pre-drilled hole
• Uncoated finish suitable for use with appropriate cutting fluids on a broad range of materials
• Straight cylindrical shank for direct fitment in standard collet chucks and end mill holders
• Regular-length profile keeps tool deflection low in standard-depth applications

Compatibility

Designed as an OEM-style solid carbide square end mill in the ROBBJACK NR-204 series, compatible with any machine spindle or toolholder accepting a 0.5-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists following standard machine tool lockout and spindle-stop procedures before changing tooling. The shank should be seated to the minimum recommended insertion depth in the collet or end mill holder and secured to the toolholder manufacturer's specified clamping torque using appropriate tooling. Confirm runout with a dial indicator before commencing cuts. Do not use this tool beyond its rated length of cut or at feed and speed parameters outside the material grade C2 carbide recommendations for the workpiece material.