Accupro 312749 Square End Mill 3/4 in 7 Flute Solid Carbide

Product Description

The ACCUPRO 312749 is a 7-flute solid carbide square end mill designed for high-performance metal removal in demanding machining applications. With a 3/4 inch mill diameter and a 2-1/4 inch length of cut, this single-end tool is built for deep-cavity milling where rigidity and heat resistance matter. The AlTiCrN coating extends tool life in high-temperature cutting environments, and the 38-degree helix angle promotes efficient chip evacuation while reducing cutting forces. Constructed from micrograin carbide, this end mill holds a sharp edge longer than standard grades, making it well suited for production environments where tool changes slow throughput.

This end mill is used in CNC milling operations on ferrous and hardened materials, including alloy steels, tool steels, and stainless steel. It is a right-hand cut, right-hand flute tool with a spiral flute type, appropriate for conventional and climb milling strategies. The 3/4 inch shank diameter fits standard ER and side-lock toolholders. It is not a centercutting tool, so plunge milling is not recommended without a pre-drilled entry point. Machinists and tooling specialists in job shops and production facilities are the primary users.

Key Features

• 7-flute design increases feed rates and improves surface finish compared to lower-flute-count equivalents
• AlTiCrN coating provides high hardness and oxidation resistance for elevated cutting temperatures
• 38-degree helix angle promotes smooth chip flow and reduces chatter in long-overhang setups
• Micrograin solid carbide substrate delivers superior edge retention and dimensional stability
• Right-hand cut and right-hand spiral flute geometry for standard CNC milling operations
• Single-end configuration with a 3/4 inch shank for direct toolholder mounting

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide square end mill in the ACCUPRO Series HS product line, compatible with standard 3/4 inch bore toolholders including ER collet chucks and side-lock holders used in CNC vertical and horizontal milling machines.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the spindle is fully stopped and the machine is in an e-stop or locked-out state before changing tooling. Seat the shank fully into the toolholder to the minimum insertion depth recommended by the holder manufacturer, and torque the clamping mechanism per the toolholder specification. Do not use this end mill for plunge entry cuts, as it is not centercutting.