Accupro 12177091 Square End Mill 9/16 in 4 Flute Carbide

Product Description

The ACCUPRO 12177091 is a solid carbide square end mill designed for precision milling in metal cutting applications. It features a 9/16-inch (0.5625 inch) mill diameter with a 1-1/4-inch length of cut and a 3-1/2-inch overall length. The four-flute, spiral-flute geometry with a 40-degree helix angle promotes efficient chip evacuation and smooth surface finishes. An AlTiN coating provides heat and wear resistance, extending tool life in ferrous and hardened materials. The micrograin carbide substrate delivers rigidity and edge retention at elevated cutting speeds. This end mill is center-cutting, allowing plunge entry into workpiece material without a pre-drilled pilot hole.

This end mill is suited for peripheral and slot milling operations in ferrous metals, stainless steel, high-temperature alloys, and hardened steels where AlTiN coating performance is advantageous. The 9/16-inch shank matches the mill diameter, making it compatible with standard collet chucks and end mill holders of the same bore size. Right-hand cut and right-hand flute configuration is standard for conventional CNC machining center setups. The extended reach designation is not applicable for this tool, placing it in the standard reach category appropriate for typical workholding depths.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance
• AlTiN finish for thermal protection in dry and high-speed cutting
• 40-degree helix angle with spiral flute geometry for effective chip evacuation
• Center-cutting design allows direct plunge milling without a pilot bore
• Right-hand cut and right-hand flute for standard CNC machine spindle use
• Mill diameter tolerance of +0.001/-0.000 inch for consistent fitment and sizing

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers and manual mills using 9/16-inch collet chucks or end mill holders. No specific model compatibility was provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before inserting or removing the tool. Seat the shank to the full recommended insertion depth in the holder and torque the collet nut or set screw to the toolholder manufacturer's specification. Inspect the cutting edges for chips or damage before each use.