Robbjack C8-203-04 Square End Mill 1/8 in 2-flute Carbide

Product Description

The ROBBJACK C8-203-04 is a 2-flute, solid carbide square end mill designed for precision milling in metal, composite, and engineering-grade plastic applications. The tool measures 0.125 inches in mill diameter with a 0.25-inch straight-cylindrical shank and an overall length of 2.5 inches. The 0.5-inch length of cut and 30-degree helix angle support efficient chip evacuation in shallow-to-moderate depth passes. Uncoated and center-cutting, this end mill handles both plunge and peripheral cutting. It is suited to CNC machining centers and manual mills where dimensional accuracy and tool life are priorities for machining professionals.

This end mill fits typical light-duty to medium-duty milling operations in job shop and production environments. The 1/8-inch diameter makes it well-suited for slotting, profiling, and contouring in tight spaces or fine-feature work. Right-hand cut and right-hand flute geometry follow standard CNC spindle convention. The C8-203 series targets applications where a regular-length, small-diameter carbide tool is required without specialty coatings or chipbreaker geometry.

Key Features

• 0.125-inch mill diameter with mill diameter tolerance of +0.000 / -0.002 inches for close-tolerance work
• Solid carbide construction, material grade C2, for hardness and wear resistance
• 30-degree spiral flute helix angle promotes chip flow and reduces cutting forces
• Center-cutting design allows direct plunge entry without a pre-drilled pilot hole
• Right-hand cut and right-hand flute for use in standard CNC and manual mill spindles
• Straight-cylindrical shank with shank diameter tolerance of -0.0001 / -0.0002 inches for secure collet grip

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide square end mill for CNC machining centers and manual milling machines accepting a 0.25-inch straight-cylindrical shank collet or end mill holder.

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 tool holder and torque the collet nut to the tool holder specification before beginning any cutting operation. Inspect the cutting edges for chipping before each use, as solid carbide is brittle and sensitive to side-loading or interrupted cuts beyond the tool's rated capacity.