Accupro 311909 Square End Mill 1 in 5 Flute Solid Carbide

Product Description

The ACCUPRO 311909 is a solid carbide square end mill designed for high-performance milling in demanding machining environments. With a 1 inch cutting diameter, a 3.25 inch length of cut, and a 5-flute spiral geometry, it delivers efficient material removal and a superior surface finish. The 38-degree helix angle promotes smooth chip evacuation and reduces cutting forces. An AlTiCrN coating provides enhanced heat resistance and wear protection, making this end mill well-suited for hard and abrasive workpiece materials. It is a single-end tool with a 1 inch shank diameter and a 6 inch overall length, sized for rigid setups on CNC machining centers and manual mills.

This end mill is used in production and job-shop machining operations where consistent performance in tough materials is required. The variable index geometry helps suppress chatter and vibration during deep-profile passes. The micrograin carbide substrate provides the toughness needed for interrupted cuts and aggressive feeds. Right-hand cutting direction and right-hand flute spiral are standard for conventional CNC spindle configurations. Machinists and CNC programmers running steel, stainless, cast iron, and similar materials will find this tool well-matched to those applications.

Key Features

• 1 inch cutting diameter with 3.25 inch length of cut for deep-profile milling
• 5-flute spiral design increases feed rates and improves finish quality
• AlTiCrN coating resists heat and abrasive wear in hard material applications
• 38-degree helix angle promotes efficient chip evacuation and reduced cutting force
• Variable index flute spacing reduces chatter and vibration during aggressive passes
• Centercutting capable for plunge entry without a pre-drilled pilot hole
• Micrograin solid carbide substrate provides a balance of hardness and toughness

Compatibility

Designed as an OEM-style replacement and standard-production solid carbide square end mill for CNC machining centers and manual milling machines accepting a 1 inch straight shank, Series HS designation.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Secure the shank in a collet, end mill holder, or hydraulic chuck rated for the shank diameter before powering the spindle. Verify tool runout with a dial indicator after clamping and before cutting. Follow the machine manufacturer and tooling manufacturer guidelines for speeds, feeds, and depth-of-cut parameters appropriate to the workpiece material.