Accupro 312126 Corner Radius End Mill 3/8 in 5 Flute

Product Description

The ACCUPRO 312126 is a solid carbide corner radius end mill designed for high-performance milling in demanding machining environments. Built on the HS series platform, it features a 3/8 inch cutting diameter, a 1/2 inch length of cut, and a 4 inch overall length. The tool carries an AlCrTiN coating that improves heat resistance and wear life at elevated cutting speeds. With 5 flutes and a variable index design, it reduces harmonic vibration and chatter during extended cuts. Machinists and CNC operators working in tool steels, hardened materials, and high-temp alloys will find this end mill well suited to finishing and semi-finishing passes where edge integrity is critical.

This end mill is intended for use in vertical and horizontal CNC machining centers and manual knee mills capable of holding a 3/8 inch shank. The extended reach geometry, with a 1-1/8 inch reach length and a reduced neck diameter of 0.356 inch, makes it appropriate for deep pocket milling, cavity work, and profiling applications where clearance past a shoulder or wall is required. Single-end, right-hand cutting configuration is standard. The centercutting capability allows plunge entry directly into material without a pre-drilled pilot hole.

Key Features

• AlCrTiN coating for elevated heat and wear resistance in hard and abrasive materials
• 5-flute, variable index design reduces chatter and improves surface finish
• Extended reach with 1-1/8 inch reach length and reduced 0.356 inch neck diameter for deep pocket access
• Solid micrograin carbide substrate for rigidity and edge sharpness retention
• Centercutting geometry allows direct plunge entry
• Right-hand flute direction and right-hand cutting for standard CNC spindle compatibility

Compatibility

Designed as an OEM-style replacement or direct-use end mill compatible with CNC machining centers and manual mills equipped with a 3/8 inch collet, ER chuck, or end mill holder.

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 changing tooling. Seat the shank fully in the holder to the minimum engagement depth recommended by the tool holder manufacturer to prevent pullout under cutting loads. Verify runout with a dial indicator after installation before beginning any cut cycle.