Robbjack SS-2-055 Square End Mill 0.055 in 2 Flute Carbide

Product Description

The ROBBJACK SS-2-055 is a solid carbide square end mill designed for precision milling in demanding shop environments. Built to the SS-2 series stub-length specification, it features a 0.055-inch cutting diameter and a 0.0825-inch length of cut, making it well suited for fine detail work, slotting, and profiling in tight geometries. The 2-flute configuration and 30-degree right-hand spiral flute promote efficient chip evacuation in a compact tool body. This end mill is uncoated and produced from ROBBJACK Tuffy-grade solid carbide, offering a balance of hardness and toughness for ferrous and non-ferrous applications. Licensed machinists and tool-and-die professionals are the primary installers and users of this tool.

This end mill is intended for use in CNC machining centers, vertical mills, and manual milling machines capable of holding a 0.125-inch straight cylindrical shank. The stub-length body provides added rigidity and reduced deflection in short-reach applications. Centercutting geometry allows plunge entry in addition to peripheral and slot milling operations. The right-hand cut and right-hand flute orientation are standard for conventional and climb milling passes.

Key Features

• 0.055-inch cutting diameter with plus 0.0005 / minus 0.0005 inch diameter tolerance
• Solid carbide Tuffy-grade material for hardness and wear resistance
• 2-flute right-hand spiral design at 30-degree helix angle for efficient chip clearance
• Centercutting geometry enables direct plunge entry
• Stub-length body increases rigidity and minimizes deflection
• Straight cylindrical 0.125-inch shank with minus 0.0001 / minus 0.0002 inch shank tolerance

Compatibility

Designed for use in any milling machine or machining center equipped with a collet, end mill holder, or chuck accepting a 0.125-inch straight cylindrical shank; verify spindle runout and holder concentricity before use with small-diameter tooling.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and locked. A precision collet or shrink-fit holder is recommended to minimize runout when running small-diameter end mills. Verify tool projection and reach before engaging the cut. Follow shop safety protocols and machine manufacturer guidelines for speed and feed setup prior to operation.