Accupro 315215 Ball End Mill 1/4 in 3 Flute Solid Carbide

Product Description

The ACCUPRO 315215 is a single-end ball end mill designed for precision milling of contoured surfaces, 3D profiles, and complex geometries in ferrous and non-ferrous materials. It features a 0.2500 inch mill diameter, a 1-1/4 inch length of cut, and a 3-inch overall length with a 1/4 inch shank. The tool is ground from micrograin solid carbide for rigidity and wear resistance, and carries a ZrN (zirconium nitride) coating that improves surface hardness and reduces friction at the cutting edge. The 37-degree helix angle promotes efficient chip evacuation and smooth cutting action. Three right-hand spiral flutes provide a balance of chip clearance and edge strength for general-purpose contouring work.

This end mill is suited for CNC machining centers and manual mills in job shop, tool-and-die, and production environments. Typical applications include profiling, slotting, and finish passes on molds, dies, and workpiece radii. The ZrN coating makes it a practical choice when machining stainless steel, alloy steels, cast iron, and harder non-ferrous alloys where tool life and surface finish are priorities. It is most commonly installed by machinists and CNC operators working in precision metalworking and mold-making operations.

Key Features

• Micrograin solid carbide construction for rigidity and extended tool life
• ZrN coating reduces cutting friction and improves wear resistance
• 37-degree right-hand helix angle for efficient chip evacuation
• Three right-hand spiral flutes balance chip clearance and cutting edge strength
• Single-end configuration with a ball nose profile for contoured and 3D surface milling
• Mill diameter tolerance of +0.000 / -0.002 inches for consistent fitment and accuracy

Compatibility

Designed for use in standard 1/4 inch collets and end mill holders on CNC machining centers and manual vertical mills requiring a single-end ball nose end mill with a 1/4 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and machine power is off before changing tooling. Seat the shank fully in a properly sized collet or end mill holder and torque the retention nut per the toolholder manufacturer specification. Inspect the cutting edges and coating for chips or damage before each use, and verify runout with a dial indicator after installation.