Robbjack TL-303-12 Square End Mill 3/8 in 3 Flute Carbide

Product Description

The ROBBJACK TL-303-12 is a solid carbide square end mill designed for precision milling in metal, composite, and other hard materials. Part of the TL-303 series in ROBBJACK's Tuffy material grade, this tool features a 3/8 inch cutting diameter, a 1-1/2 inch length of cut, and a 3-1/4 inch overall length. The three-flute, spiral-flute geometry with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. Centercutting capability allows for direct plunge entry without a pre-drilled hole. This end mill is uncoated and ships ready for use in standard or CNC milling operations.

The TL-303-12 is suited for general-purpose and finishing milling operations in shop and production environments. Its extra-long length classification makes it appropriate for reaching into deeper pockets or features that standard-length end mills cannot access. The straight cylindrical shank fits standard 3/8 inch collets and end mill holders. Right-hand cut and right-hand flute orientation are standard for conventional CNC vertical and horizontal milling machine setups. Machinists and tool-and-die professionals working in job shops, manufacturing facilities, and toolrooms are the primary users of this tool.

Key Features

• Solid carbide Tuffy material grade for wear resistance in hard and abrasive workpiece materials
• 3-flute spiral flute geometry with 30-degree helix angle for efficient chip evacuation
• Centercutting design allows direct plunge milling without pilot drilling
• Extra-long classification with 1-1/2 inch length of cut for deep pocket access
• Uncoated finish - compatible with a wide range of workpiece materials and cutting fluids
• Right-hand cut, right-hand flute for standard CNC milling machine spindle compatibility

Compatibility

Designed as a direct-fit replacement or standard tooling selection for 3/8 inch collet chucks, shrink-fit holders, and end mill holders on CNC vertical machining centers and manual knee mills. Part of the ROBBJACK TL-303 series.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill from the tool holder. Seat the shank fully into the collet or holder to the recommended gauge line depth and torque the retention mechanism per the holder manufacturer's specifications. Verify runout with a dial indicator before beginning cuts to avoid premature tool wear or workpiece damage.