Accupro 313378 Corner Radius End Mill 5/8 in 2 Flute Zrn

Product Description

The ACCUPRO 313378 is a solid carbide corner radius end mill designed for precision milling operations where a controlled edge radius is required at the base of a cut. Ground from micrograin carbide stock and coated with zirconium nitride (ZrN), this tool delivers extended wear resistance in ferrous and non-ferrous materials. The 0.030-inch corner radius reduces stress concentration at the cutting edge, helping prevent chipping during aggressive cuts. The 45-degree helix and two-flute geometry promote efficient chip evacuation. At 0.625 inches in diameter with a 1.625-inch length of cut, it suits both roughing and finishing passes where edge integrity matters. Licensed machinists and CNC tooling specialists are the primary users.

This end mill is suited for vertical machining centers and manual mills running right-hand spindle rotation. The single-end configuration and 3.5-inch overall length provide adequate reach for standard workholding setups. Centercutting capability allows plunge entry without a pre-drilled pilot hole. Applications include die and mold work, aerospace component profiling, and general precision machining where a radiused floor-to-wall transition is required. The ZrN coating is particularly well-suited to aluminum, titanium, and other non-ferrous alloys, offering low friction and good release characteristics.

Key Features

• Micrograin solid carbide construction for rigidity and edge retention
• ZrN coating reduces friction and extends tool life in non-ferrous materials
• 0.030-inch corner radius minimizes edge chipping and stress concentration
• 45-degree helix promotes efficient chip evacuation and smooth cutting action
• Centercutting design allows direct plunge entry
• Right-hand flute direction and right-hand cutting for standard CNC spindle use

Compatibility

Designed as an OEM-style replacement or direct-fit tooling solution for 5/8-inch collets and tool holders used in vertical and horizontal CNC machining centers with right-hand spindle rotation.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the 5/8-inch straight shank fully into a clean, undamaged collet or end mill holder and torque the retention mechanism to the tool holder manufacturer's specification. Verify runout with a dial indicator before beginning production cuts.