Accupro 12183402 Square End Mill 1/4 in 4 Flute Carbide

Product Description

The ACCUPRO 12183402 is a solid carbide, four-flute square end mill designed for precision milling operations across a wide range of ferrous and non-ferrous materials. Built from micrograin carbide, it offers a 0.250-inch mill diameter, a 1.250-inch length of cut, and a 3.000-inch overall length, placing it in the extra-long category for extended-reach applications. The 40-degree helix angle promotes efficient chip evacuation and smooth cutting action. The uncoated finish suits shops that prefer to apply their own coatings or work with materials where coatings offer no advantage.

This end mill is suited for milling operations in job shops, tool rooms, and production machining environments. Its centercutting geometry allows plunge entry directly into the workpiece, enabling slot milling, pocket milling, and contour work without a pre-drilled pilot hole. Right-hand cut and right-hand flute configuration is standard for use in conventional CNC machining centers and manual knee mills. The extra-long OAL makes it practical for deep-pocket work where a standard-length tool would not reach.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• 4-flute spiral design with a 40-degree helix angle for efficient chip evacuation
• Centercutting geometry allows direct plunge entry without a pilot hole
• Extra-long 3.000-inch OAL with 1.250-inch length of cut for deep-pocket applications
• Right-hand cut, right-hand flute configuration for standard CNC and manual mill use
• Uncoated finish compatible with a broad range of workpiece materials

Compatibility

Designed as an OEM-style replacement or direct-fit cutting tool for standard 1/4-inch collets and tool holders used in CNC machining centers, vertical milling machines, and router spindles accepting 1/4-inch shank tooling.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before inserting or removing the end mill from the collet or tool holder. Seat the shank to the recommended insertion depth per the tool holder manufacturer's guidelines, and verify runout with a dial indicator before beginning a cut. Do not exceed the tool's rated length of cut engagement to avoid deflection or breakage.