Accupro 12178616 Square End Mill 5/8 in 3 Flute Solid Carbide

Product Description

The ACCUPRO 12178616 is a solid carbide square end mill designed for precision milling in ferrous and non-ferrous materials. It features a 5/8 inch cutting diameter, a 2.5 inch length of cut, and a 6 inch overall length, placing it in the long-reach category for applications requiring extended projection from the spindle. The 3-flute geometry with a 40-degree helix angle promotes efficient chip evacuation and balanced cutting forces. A ZrN (zirconium nitride) coating provides surface hardness and thermal resistance. The micrograin carbide substrate supports feeds and speeds appropriate for high-productivity roughing and finishing passes on CNC machining centers and manual mills.

This end mill suits job shops, tool rooms, and production environments where a long-reach 5/8 inch tool is needed to access deep pockets, slots, or stepped features. The centercutting design allows plunge entry, making it practical for pocketing operations without requiring a pre-drilled starter hole. Right-hand cut and right-hand spiral flute orientation is standard for conventional spindle setups. The spiral flute geometry without a chipbreaker or variable index makes it well suited to finishing and semi-finishing passes where surface finish consistency matters.

Key Features

• Solid micrograin carbide construction for rigidity and edge retention in demanding cuts
• ZrN coating adds surface hardness and reduces heat buildup at the cutting edge
• 40-degree helix angle promotes smooth chip flow and reduced cutting forces
• Centercutting capability allows direct plunge entry into workpiece material
• Long-length classification with 2.5 inch LOC enables deep pocket and slot access
• Right-hand cut, right-hand flute for standard CNC and manual mill spindle compatibility

Compatibility

Designed as an OEM-style replacement or direct-selection solid carbide square end mill for CNC machining centers and manual vertical mills accepting a 5/8 inch straight shank.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Secure the shank in a collet or end mill holder rated for the shank diameter and confirm runout with a dial indicator before cutting. Ensure the machine spindle is fully stopped and locked out before inserting or removing the tool. Do not exceed the tool manufacturer's recommended depth-of-cut or feed rate for the specific workpiece material.