Robbjack NR-204-12 Square End Mill 3/8 Inch Solid Carbide

Product Description

The ROBBJACK NR-204-12 is a 2-flute solid carbide square end mill designed for precision milling operations in metalworking and machining environments. With a 3/8 inch cutting diameter and a 7/8 inch length of cut, this tool delivers consistent stock removal on ferrous and non-ferrous materials. The right-hand cut with a 30-degree helix spiral flute geometry promotes efficient chip evacuation and reduced heat buildup during operation. Built to Series NR-204 standards, this single-end tool is suited for machinists and tool-and-die professionals working in manual or CNC machining setups where dimensional accuracy and tool reliability are required.

This end mill is appropriate for use in general-purpose milling applications including slotting, profiling, and peripheral milling. The centercutting design allows plunge entry into workpieces, expanding its versatility across a range of operations. The straight cylindrical shank measures 3/8 inch in diameter, compatible with standard collets and end mill holders used in vertical mills, machining centers, and knee mills. The regular-length body keeps tool deflection manageable during moderate-depth passes in production and job shop settings.

Key Features

• Solid carbide construction with C2 material grade for rigidity and wear resistance
• 2-flute, right-hand cut and right-hand spiral flute configuration for efficient chip flow
• 30-degree helix angle balances cutting action and chip evacuation
• Centercutting geometry enables direct plunge milling without pre-drilling
• Uncoated finish suitable for applications where coating is not required or where regrinding is planned
• Straight cylindrical shank for use with standard collet or end mill holder tooling

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill for standard 3/8 inch collets and end mill holders in CNC machining centers and conventional milling machines.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool from the holder. Verify collet or holder bore size matches the 3/8 inch shank before clamping. Do not exceed manufacturer-recommended feeds and speeds for the workpiece material and tool diameter.