Accupro 12181725 Square End Mill 3/8 in 2 Flute Carbide

Product Description

The ACCUPRO 12181725 is a solid carbide square end mill designed for precision milling operations in metal, composites, and engineered plastics. Built from micrograin carbide, it delivers the hardness and edge retention required for demanding cuts at tight tolerances. The 3/8 inch diameter tool carries a 2-flute configuration with a 40-degree helix spiral flute geometry, which promotes efficient chip evacuation and reduces cutting forces in both slotting and peripheral milling. It is centercutting, allowing direct plunge entry. Right-hand cut and right-hand flute orientation are standard. This is an uncoated end mill intended for use where coolant application or specific workpiece chemistry makes coated tooling less appropriate.

The 12181725 is suited for long-reach milling applications where standard-length end mills cannot access a feature. With a 1-1/8 inch length of cut and a 3 inch overall length on a 3/8 inch shank, this tool fits collet chucks, end mill holders, and shrink-fit tooling common in CNC machining centers and manual knee mills. It is appropriate for ferrous and non-ferrous workpiece materials in job shop, production, and MRO environments. Licensed machinists and CNC operators are the primary users.

Key Features

• Micrograin solid carbide construction for superior hardness and edge retention
• 40-degree helix angle promotes aggressive chip flow in deep pockets and slots
• Centercutting design allows direct plunge milling without a pilot hole
• Long-length series provides 1-1/8 inch length of cut for extended reach applications
• Uncoated finish suitable for applications where coolant is used or coating compatibility is a concern
• Right-hand cut and right-hand flute for use in standard spindle rotation setups

Compatibility

Designed as a standard 3/8 inch shank square end mill compatible with collet chucks, end mill holders, and shrink-fit tooling accepting 3/8 inch shank tooling on CNC machining centers and manual milling machines.

Installation Notes

Installation is performed by qualified machinists following shop tooling procedures. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Verify holder runout with a dial indicator after seating the shank to the specified depth. Mill diameter tolerance is +0.000 inches to -0.002 inches and shank diameter tolerance is -0.0001 inches to -0.0004 inches — confirm these are within drawing callout before use.