Accupro 312807 Square End Mill 1 in 7 Flute Solid Carbide

Product Description

The ACCUPRO 312807 is a solid carbide square end mill designed for high-performance milling in demanding metalworking applications. Built from micrograin solid carbide with an AlTiCrN coating, this tool delivers extended tool life and heat resistance when cutting hardened steels, stainless steels, and high-temp alloys. The 7-flute geometry increases chip load per tooth while maintaining material removal rates. With a 1 inch cutting diameter, a 3.25 inch length of cut, and a 38-degree helix angle, the 312807 is suited for deep-cavity finishing passes and long-reach profiling operations where rigidity and surface finish are critical. Installed by machinists and tool-and-die professionals on CNC vertical and horizontal machining centers.

This end mill fits into standard CNC machining center applications requiring a 1 inch shank diameter. The 6 inch overall length and 3.25 inch length of cut make it appropriate for deep-pocket milling, slot finishing, and contour work in mold and die, aerospace, and general precision machining environments. The right-hand cut and right-hand spiral flute direction are standard for conventional CNC milling setups. The Series HS designation indicates a high-speed geometry optimized for harder workpiece materials. This is a single-end tool with no chipbreaker and a non-centercutting configuration, meaning plunge cuts require a pre-drilled entry point or ramping strategy.

Key Features

• 7-flute design increases feed rate capability and improves surface finish on finishing passes
• AlTiCrN coating provides oxidation resistance and hardness retention at elevated cutting temperatures
• 38-degree helix angle promotes smooth chip evacuation and reduces cutting forces
• Micrograin solid carbide substrate offers superior rigidity and wear resistance over high-speed steel alternatives
• 3.25 inch length of cut supports deep-pocket and long-reach milling without tool extension adapters
• Right-hand cut, right-hand spiral configuration compatible with standard CNC milling spindle direction

Compatibility

Designed for use in CNC machining centers accepting a 1 inch straight shank with right-hand spindle rotation. Non-centercutting geometry requires ramping or helical interpolation entry rather than direct plunge.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Secure the shank in a collet chuck, end mill holder, or shrink-fit toolholder rated for the 1 inch shank diameter, and verify runout with a dial indicator before production cutting. Power down and lock out the spindle before changing tooling. Do not exceed the tool manufacturer's recommended speeds and feeds for the workpiece material and coating type.