Accupro 12177078 1/4 Inch 4 Flute Solid Carbide Square End Mill

Product Description

The ACCUPRO 12177078 is a solid carbide square end mill designed for precise milling operations in metalworking and machining environments. It features a 0.25 inch cutting diameter, a 0.75 inch length of cut, and a 2.5 inch overall length with a 0.25 inch shank. The four-flute, right-hand spiral configuration with a 40-degree helix angle promotes efficient chip evacuation and smooth surface finishes. Micrograin carbide construction delivers hardness and wear resistance across a range of ferrous and non-ferrous materials. The uncoated finish makes it well suited for applications where coating compatibility or regrinding is a factor.

This end mill is intended for use in manual mills, CNC machining centers, and knee mills performing slotting, profiling, and peripheral milling operations. Centercutting geometry allows plunge entry directly into the workpiece without a pre-drilled hole. It is appropriate for use in tool and die, general machining, and production environments where a standard square-end profile is required. The right-hand cut and right-hand flute orientation are standard for conventional and climb milling setups on most vertical and horizontal spindles.

Key Features

• 0.25 inch cutting diameter with mill diameter tolerance of plus 0.001 inch / minus 0.000 inch for consistent dimensional accuracy
• Micrograin solid carbide construction for rigidity and extended tool life
• 40-degree helix angle spiral flute promotes aggressive chip evacuation and reduces heat buildup
• Centercutting design allows direct plunge milling without a pilot hole
• Four flutes provide a balance of chip clearance and surface finish quality
• Uncoated finish suitable for applications requiring regrinding or where coatings are not specified

Compatibility

Designed as a standard replacement or direct-use square end mill for CNC machining centers and manual mills accepting a 0.25 inch straight shank. Verify spindle collet or holder specification before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully powered down and locked out before changing tooling. Seat the shank fully into the collet or end mill holder and torque to the holder manufacturer specification. Inspect the cutting edges for chips or damage before each use, and confirm runout with a dial indicator when tight tolerances are required.