Accupro E999921209 Square End Mill 1/2 in 3 Flute

Product Description

The ACCUPRO E999921209 is a single-end square end mill designed for milling flat surfaces, shoulders, slots, and pockets in a variety of workpiece materials. Built from powdered metal, it delivers a good balance of toughness and wear resistance suited to general-purpose machining. The 1/2-inch diameter cutting head features 3 spiral flutes with a 42-degree helix angle, promoting efficient chip evacuation and smooth cutting action. The bright/uncoated finish keeps surface finish consistent and works well with cutting fluids. This end mill is installed and operated by machinists and CNC programmers in job shop and production environments.

This end mill fits standard 1/2-inch collets and end mill holders on vertical mills, knee mills, and CNC machining centers. With a 2-inch length of cut and 4-inch overall length, it handles moderate-depth passes in ferrous and non-ferrous materials. The right-hand cut and right-hand flute direction are compatible with conventional spindle configurations. Centercutting capability allows plunge entry into the workpiece, supporting ramping and helical interpolation strategies. No extended reach geometry is present, keeping the setup rigid for general milling work.

Key Features

• 1/2-inch mill diameter with plus 0.0015 / minus 0.0000 inch tolerance for consistent sizing
• 3 spiral flutes with a 42-degree helix angle for effective chip evacuation
• 2-inch length of cut supports moderate-depth slotting and profiling passes
• Centercutting design enables plunge entry, ramping, and helical interpolation
• Powdered metal construction balances toughness and wear resistance
• Bright/uncoated finish compatible with a wide range of cutting fluids and dry machining

Compatibility

Designed for use with standard 1/2-inch collet chucks and end mill holders on vertical mills and CNC machining centers with right-hand spindle rotation.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines. Ensure the spindle is fully powered down and locked before inserting or removing the end mill from the holder. Secure the shank to the full recommended engagement depth in the collet or holder to minimize runout and prevent pullout under load. Inspect the cutting edges for chips or damage before each use and replace if edge condition is compromised.