Accupro 31857238 Ball End Mill 3/8 in 4 Flute Solid Carbide

Product Description

The ACCUPRO 31857238 is a solid carbide ball end mill designed for precision milling operations in metalworking and machining applications. With a 3/8 inch (0.3750 inch) mill diameter and a 0.3490 inch length of cut, this single-end tool delivers controlled material removal in contoured and profiled surfaces. The four-flute geometry paired with a variable index design reduces harmonic vibration during cuts, improving surface finish and tool life. An AlTiCrN coating provides heat and wear resistance, making this end mill well suited for hardened steels, stainless alloys, and other abrasive materials encountered in production and job-shop environments. Licensed machinists and CNC programmers are the primary users.

This ball end mill is built for CNC machining centers and manual mills in both shop and production settings. It is used in die-and-mold work, contour milling, profiling, and 3D surfacing where a full-radius cutting edge is required. The 3/8 inch shank diameter fits standard ER collets, shrink-fit holders, and side-lock adapters common to most machining centers. The 2.5 inch overall length provides adequate reach for moderate-depth cavities without excessive tool deflection. This tool is appropriate for aerospace, automotive, and general precision-machining work.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding cuts
• AlTiCrN coating extends tool life in hardened steels and abrasive alloys
• Variable index flute spacing reduces chatter and improves surface finish
• Four-flute design balances chip evacuation with cutting edge strength
• Single-end configuration with 3/8 inch shank fits standard collet and toolholder systems
• Ball nose profile enables full-radius contour and 3D surface milling

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers and manual milling machines that accept a 3/8 inch shank diameter end mill.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing tooling. Seat the shank fully into the collet or toolholder and torque the retention hardware per the toolholder manufacturer specifications. Inspect the cutting edges and coating condition before each use; do not run chipped or visibly worn tooling.