Robbjack S1-301-06 Square End Mill 3/16 in 3 Flute Carbide

Product Description

The ROBBJACK S1-301-06 is a solid carbide square end mill engineered for precision milling in ferrous and non-ferrous materials. Part of the S1-301 series, this stub-length tool features a 3/16 inch cutting diameter, 3/8 inch length of cut, and a 3-flute spiral geometry with a 30-degree helix angle. The right-hand cut and right-hand flute configuration promotes efficient chip evacuation in standard CNC and manual milling operations. Centercutting capability allows plunge entry without a pre-drilled pilot hole. Licensed machinists, tool and die makers, and CNC operators are the primary end users of this tool.

This end mill is suited for light profiling, slotting, and peripheral milling passes where a compact stub-length tool is preferred for rigidity. The 3/16 inch straight cylindrical shank fits standard ER collet chucks and end mill holders commonly found in vertical machining centers and knee mills. The uncoated solid carbide construction at C2 material grade provides a sharp cutting edge suitable for aluminum, brass, and mild steel applications. The 2 inch overall length keeps deflection low in tight-clearance setups.

Key Features

• Solid carbide construction at C2 grade for edge retention and rigidity
• 3-flute spiral design with 30-degree helix angle for balanced cutting and chip flow
• Centercutting geometry allows direct plunge milling without pre-drilling
• Stub length (2 inch OAL) minimizes tool deflection in precision setups
• Right-hand cut, right-hand flute for use in standard spindle rotation
• Uncoated finish maintains sharp edge geometry for non-ferrous and soft ferrous materials

Compatibility

Designed as a direct-fit replacement or standard tooling selection within the ROBBJACK S1-301 series for 3/16 inch straight-shank end mill holders and ER collet systems.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and the control in a safe state. Ensure the collet or holder bore is clean and free of chips before seating the shank. Tighten to the tool holder manufacturer's specified torque range using the appropriate spanner wrench. Verify runout with a dial indicator before beginning a production cut to confirm proper seating.