Robbjack T12-201-10 Square End Mill 5/16 in 2 Flute Carbide

Product Description

The ROBBJACK T12-201-10 is a solid carbide square end mill from the T12-201 series, designed for precision milling in metalworking and machining applications. The cutter measures 0.3125 inches (5/16 inches) in diameter with a 7/16-inch length of cut and a 3/8-inch straight cylindrical shank. Built to a stub length configuration at 2-1/2 inches overall, this two-flute design offers a right-hand cut with right-hand spiral flutes at a 30-degree helix angle. The centercutting geometry allows plunge entry, making it suitable for slotting, profiling, and pocketing operations. Machined from ROBBJACK Tuffy-grade solid carbide, the tool runs uncoated and is suited for shops that prefer to apply their own coatings or work with materials where an uncoated edge is preferred.

This end mill is intended for use in CNC machining centers, knee mills, and manual milling machines operating in production and job-shop environments. The stub length format reduces overhang and improves rigidity during aggressive cuts in ferrous and non-ferrous materials. It is typically installed by machinists and tool-and-die professionals in applications requiring tight tolerances and consistent edge geometry. The T12-201 series is a standard offering from ROBBJACK for shops requiring reliable solid carbide tooling in common inch sizes.

Key Features

• Solid carbide construction using ROBBJACK Tuffy material grade for wear resistance
• Two-flute geometry supports efficient chip evacuation in slotting and pocketing
• Centercutting design allows direct plunge entry without a pre-drilled start hole
• 30-degree helix angle balances cutting forces and surface finish
• Right-hand cut and right-hand flute orientation for standard spindle use
• Stub length format improves rigidity and reduces deflection in tight setups

Compatibility

Designed as an OEM-style solid carbide end mill compatible with any milling machine or machining center that accepts a 3/8-inch straight cylindrical shank, including ER collet chucks, end mill holders, and equivalent workholding systems.

Installation Notes

Installation is performed by qualified machinists using an appropriate collet chuck or end mill holder rated for the 3/8-inch shank diameter. Ensure the spindle is fully de-energized and at a complete stop before loading or removing the tool. Verify runout with a dial indicator after installation to confirm concentricity within acceptable tolerance for the intended operation. Follow applicable machine tool safety guidelines and shop standard operating procedures for tool changes.