Robbjack SS-2-026 Square End Mill 0.026 in 2 Flute Carbide

Product Description

The ROBBJACK SS-2-026 is a solid carbide square end mill designed for precision milling in tight-tolerance applications. With a 0.026-inch cutting diameter and a 0.039-inch length of cut, this stub-length tool is built for micro-milling tasks where rigidity and accuracy are critical. The 2-flute, right-hand spiral configuration with a 30-degree helix angle promotes efficient chip evacuation while maintaining clean edge geometry. It runs uncoated on a straight cylindrical 0.125-inch shank and measures 1.5 inches overall. Machinists and CNC operators in tool and die, medical device, and precision component shops are the primary users.

This end mill is suited for milling operations requiring very small-diameter tooling, including slotting, profiling, and plunge cutting in ferrous and non-ferrous materials. The centercutting geometry allows direct plunge entry. The Tuffy material grade carbide substrate is selected for toughness in micro-diameter applications where tool breakage is a primary concern. Typical install environments include CNC machining centers and high-speed spindle setups running stub-reach toolpaths in close-clearance workpieces.

Key Features

• 0.026-inch cutting diameter with plus or minus 0.0005-inch diameter tolerance for tight-tolerance work
• Solid carbide Tuffy grade substrate balances hardness and chip resistance in small-diameter tools
• Centercutting design enables direct plunge entry without pre-drilling
• 30-degree right-hand spiral flute promotes chip flow and reduces heat buildup
• Stub length construction maximizes rigidity and minimizes deflection at micro diameters
• Straight cylindrical 0.125-inch shank fits standard collet and end mill holder systems

Compatibility

Designed as an OEM-style solid carbide micro end mill in the ROBBJACK SS-2 series, compatible with standard 0.125-inch collets and end mill holders on CNC machining centers and high-speed spindles.

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 an e-stop or locked-out state before changing tooling. Use a properly sized collet or end mill holder matched to the 0.125-inch shank diameter and torque the retention mechanism per the holder manufacturer specification. At micro diameters, runout control is critical - verify TIR with a test indicator before beginning a production run.