Robbjack NR-404-03 Square End Mill 3/32 in 4 Flute Carbide

Product Description

The ROBBJACK NR-404-03 is a solid carbide square end mill designed for precision milling in ferrous and non-ferrous materials. Turning 3/32 inches in diameter with a 3/8-inch length of cut and a 1/8-inch straight cylindrical shank, this tool is built for tight-tolerance finishing and profiling work. The four-flute spiral design with a 30-degree helix angle promotes efficient chip evacuation while maintaining surface finish quality. At 1-1/2 inches overall length, it fits standard CNC machining centers and manual mills. This is an uncoated, centercutting tool, capable of plunge entry without a pre-drilled pilot hole.

The NR-404-03 is suited for light profiling, slotting, and contouring operations in applications where small-diameter tooling is required. It is commonly used in precision machine shops, tool and die work, mold making, and production environments requiring consistent dimensional accuracy in close-quarters cuts. The regular-length configuration and solid carbide construction make it appropriate for both CNC and manual milling setups where rigidity and wear resistance matter. No extended reach is required for standard applications this tool targets.

Key Features

• Solid carbide construction, material grade C2, for hardness and wear resistance in demanding milling applications
• 4-flute spiral design with 30-degree helix angle for balanced chip flow and surface finish performance
• Centercutting geometry allows direct plunge entry without pre-drilling
• Right-hand cut and right-hand flute configuration for standard spindle operation
• Uncoated finish suitable for applications where coating is not required or where regrinding is anticipated
• Straight cylindrical shank for secure clamping in collets and end mill holders

Compatibility

Designed as an OEM-style solid carbide square end mill in the ROBBJACK NR-404 series, compatible with standard collet chucks and end mill holders accepting a 1/8-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank fully into the collet or holder to the recommended engagement depth and verify runout before cutting. Do not exceed the rated depth of cut or feed rate for the workpiece material and tool diameter.