Robbjack T12-203-08 Square End Mill 1/4 in 2 Flute Carbide

Product Description

The ROBBJACK T12-203-08 is a solid carbide square end mill engineered for precision milling in ferrous and non-ferrous materials. Part of the T12-203 Series in the Tuffy material grade line, this tool features a 0.25 inch cutting diameter, a 0.75 inch length of cut, and a 3/8 inch straight-cylindrical shank with a 2.5 inch overall length. The 2-flute, right-hand spiral design with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. The centercutting geometry allows plunge entry without pre-drilling. It is an uncoated tool intended for applications where coating would interfere with tolerances or where re-grinding is planned. Machinists and CNC operators in job shops and production facilities are the primary users.

This end mill is suited for slotting, profiling, and plunging operations on a CNC machining center or manual mill. The regular-length configuration and straight shank make it a standard fit for collet and end mill holders commonly used in light-to-medium duty milling setups. The 2-flute design favors softer materials and applications requiring aggressive chip clearance, such as aluminum, plastics, and some steels within the appropriate feeds and speeds for the Tuffy carbide grade.

Key Features

• Solid carbide Tuffy grade construction for rigidity and wear resistance
• 0.25 inch cutting diameter with mill diameter tolerance of +0.001 / -0.000 inches
• 2-flute, right-hand cut and right-hand flute spiral geometry
• 30-degree helix angle for effective chip evacuation
• Centercutting design allows direct plunge entry
• Straight-cylindrical shank at 3/8 inch diameter for standard collet compatibility

Compatibility

Designed as a standard-fitment replacement or production end mill for CNC machining centers and manual mills accepting a 3/8 inch straight-cylindrical shank; part of the ROBBJACK T12-203 Series.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the shank fully into the collet or end mill holder to the recommended engagement depth before tightening. Verify runout with a dial indicator before commencing a cut. Always power down and lock out the spindle before changing tooling.