Robbjack SR-2-013 Square End Mill 0.013 in 2 Flute Carbide

Product Description

The ROBBJACK SR-2-013 is a miniature square end mill designed for precision milling in tight geometries and small-feature machining applications. Built from solid carbide in the Tuffy material grade, this single-end tool measures 0.013 inches in cutting diameter with a 0.039-inch length of cut and a 1/8-inch straight cylindrical shank. Overall length is 1.5 inches. The 2-flute, spiral-flute geometry with a 30-degree helix angle supports efficient chip evacuation at micro-scale feed rates. The centercutting design allows plunge entry. This tool is uncoated and intended for use by machinists and tool-and-die professionals working in CNC milling environments.

The SR-2-013 is suited for micro-milling operations in materials that benefit from a sharp, uncoated carbide edge. Typical applications include engraving, slot milling, profiling, and contouring of small features in metals, plastics, and composites. The regular-length designation keeps the tool compact for rigidity at this diameter. Right-hand cut and right-hand flute orientation are standard for conventional CNC spindle setups. This tool is part of the SR-2 series, which is optimized for micro-diameter work where dimensional accuracy is critical.

Key Features

• 0.013-inch cutting diameter with plus or minus 0.0005-inch mill diameter tolerance for repeatable micro-feature accuracy
• Solid carbide Tuffy grade construction for wear resistance and rigidity at small diameters
• 2-flute spiral geometry with 30-degree helix angle promotes chip flow in confined cuts
• Centercutting design enables direct plunge entry without pre-drilling
• Uncoated finish suited for applications where coating buildup at micro scale would affect dimensional tolerance
• Straight cylindrical 1/8-inch shank fits standard collet chucks without special toolholding

Compatibility

Designed as an OEM-style replacement or direct-use micro end mill for CNC machining centers and milling machines equipped with standard 1/8-inch collet or end mill chuck toolholding systems.

Installation Notes

Installation and tool changes must be performed by qualified machinists with the spindle fully stopped and the machine in a safe, de-energized state. At 0.013-inch diameter, this tool is extremely fragile and requires precise collet seating to avoid runout-induced breakage. Verify collet size and condition before clamping. Follow machine tool manufacturer guidelines for speeds, feeds, and depth of cut at micro diameters, and avoid side loading beyond the 0.039-inch length of cut.