Accupro 12465790 Ball End Mill 0.028 in 4 Flute Carbide Altin

Product Description

The ACCUPRO 12465790 is a miniature solid carbide ball end mill designed for precision milling operations in tight geometries and small-feature work. With a 0.0280-inch cutting diameter and a 0.0420-inch length of cut, this tool targets fine-detail contouring, slotting, and profiling in hardened materials and high-strength alloys. The four-flute, right-hand spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and smooth surface finishes at elevated feeds and speeds. An AlTiN coating increases surface hardness and heat resistance, extending tool life in dry or semi-dry cutting conditions. Licensed machinists and CNC tool room operators are the primary users of this end mill.

This end mill fits standard small-diameter collet toolholders with a 1/8-inch shank diameter. The 1.5-inch overall length keeps rigidity high in setups where reach requirements are minimal. It is suited for mold and die work, medical component machining, aerospace detail parts, and precision instrument manufacturing where feature sizes demand sub-0.030-inch tooling. Single-end construction means the tool is replaced rather than reindexed when worn.

Key Features

• 0.0280-inch ball nose cutting diameter with mill diameter tolerance of +0.0000 / -0.0010 inches for consistent sizing
• AlTiN coating for elevated heat resistance and extended tool life in ferrous and hardened materials
• 4-flute, right-hand spiral design with 30-degree helix for efficient chip flow and improved surface finish
• Micrograin solid carbide substrate for rigidity and wear resistance at small diameters
• 1/8-inch shank diameter with tolerance of -0.0001 / -0.0003 inches for accurate collet seating
• Miniature series, single-end construction — 1.5-inch OAL for compact, rigid setups

Compatibility

Designed as a miniature-series replacement-grade solid carbide ball end mill compatible with standard 1/8-inch collet toolholders on CNC machining centers and manual mills.

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 1/8-inch shank fully into a clean, undamaged collet or end mill holder and torque the retention nut to the toolholder manufacturer's specification. Inspect the cutting edges and coating condition before each use; at this diameter, edge chipping is not always visible without magnification.