Robbjack SR-2-057 Square End Mill 0.057in 2 Flute Carbide

Product Description

The ROBBJACK SR-2-057 is a solid carbide square end mill engineered for precision milling in demanding machining environments. Part of the SR-2 series, this two-flute tool features a 0.057-inch cutting diameter, a 0.171-inch length of cut, and a 1/8-inch straight-cylindrical shank. The solid carbide construction in ROBBJACK's Tuffy material grade delivers hardness and wear resistance suitable for ferrous and non-ferrous materials. At 1.5 inches overall length, this is a compact, regular-length tool designed for controlled cuts in tight geometries. Machinists, tool-and-die makers, and CNC operators are the primary installers and users.

This end mill is suited for slotting, profiling, and plunging operations in precision machining applications. The centercutting geometry allows direct plunge entry without a pre-drilled hole. The 30-degree right-hand spiral flute promotes efficient chip evacuation and smooth cutting action. Its small 0.057-inch diameter makes it appropriate for fine-feature milling, micro-slot cutting, and detailed contouring work in materials where tight tolerances are required. The uncoated finish makes it a cost-effective option for general-purpose runs or applications where coating is not specified.

Key Features

• 0.057-inch cutting diameter with a tight mill diameter tolerance of plus or minus 0.0005 inches
• Solid carbide construction in Tuffy material grade for hardness and wear resistance
• Centercutting design allows direct plunge milling without a pilot hole
• 30-degree right-hand spiral flute for efficient chip evacuation
• Two-flute configuration optimized for slot and profile milling in fine-feature applications
• Straight-cylindrical 1/8-inch shank with shank diameter tolerance of -0.0001 to -0.0002 inches

Compatibility

Designed as an OEM-style replacement or direct-fit tool for CNC machining centers and manual mills accepting a 1/8-inch straight-cylindrical shank collet or chuck.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill from the collet or tool holder. Verify collet size matches the 1/8-inch shank diameter and that the tool is seated to the correct gauge length before tightening. Inspect the cutting edges for chips or damage prior to each use, as carbide tooling is brittle and sensitive to improper handling.