Accupro E999921230 Square End Mill 1 in 3 Flute Powdered Metal

Product Description

The ACCUPRO E999921230 is a single-end square end mill engineered for milling operations that demand accurate flat-bottom cuts and sharp corner geometry. Built from powdered metal, it offers improved toughness and wear resistance compared to standard high-speed steel. The tool features a 1 inch cutting diameter, a 2 inch length of cut, and a 42-degree helix angle that promotes efficient chip evacuation and reduces cutting forces. Three spiral flutes deliver a balance of rigidity and chip clearance suited to a wide range of materials. Machinists, tool-and-die professionals, and CNC operators working in metalworking shops are the primary users of this tool.

This end mill is suited for use in vertical machining centers, CNC mills, and manual knee mills performing slotting, profiling, and peripheral milling operations. The 1 inch shank diameter provides a stable, secure fit in standard collet chucks and end mill holders. With a 4.5 inch overall length and a right-hand cut with right-hand flute orientation, it is set up for conventional and climb milling approaches on ferrous and non-ferrous materials. The uncoated surface finish makes it appropriate for applications where coating compatibility is a concern or where regrinding is planned.

Key Features

• Powdered metal construction for improved toughness and edge retention over standard HSS
• 42-degree helix angle promotes smooth cutting action and efficient chip flow
• Centercutting design allows direct plunge entry into the workpiece
• Three spiral flutes balance chip clearance with tool body strength
• Right-hand cut and right-hand flute orientation for standard spindle operation
• Uncoated finish suitable for regrinding and coating applications

Compatibility

Designed as a standard single-end square end mill with a 1 inch shank diameter, compatible with end mill holders and collet chucks sized for 1 inch straight-shank tooling used in CNC and manual milling machines.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the tool changer or quill is locked before inserting or removing the end mill. Verify that the holder bore and collet are clean and free of chips before seating the shank to the recommended insertion depth. Follow the machine tool manufacturer torque specifications for drawbar and collet nut tightening.