Accupro 12177143 Square End Mill 5/16 in 4 Flute Carbide

Product Description

The ACCUPRO 12177143 is a solid carbide square end mill designed for high-performance metal removal in milling operations. Built from micrograin carbide and finished with an AlTiN coating, it handles abrasive materials and elevated cutting temperatures better than uncoated or HSS tooling. The 5/16-inch cutting diameter pairs with a 5/8-inch length of cut and a 40-degree helix angle for aggressive chip evacuation. With four spiral flutes and a centercutting geometry, this end mill supports both plunging and peripheral milling. It is a right-hand cut, right-hand flute tool intended for use in CNC machining centers and manual mills by machinists and tool-and-die professionals.

This end mill suits precision milling work in steel, stainless steel, cast iron, and similar ferrous materials where AlTiN coating provides thermal protection. The 2-5/8-inch reach length and 4-inch overall length make it appropriate for deeper-pocket and extended-reach applications without the need for a separate extended-reach holder. The 5/16-inch shank diameter fits standard ER collet chucks and end mill holders commonly found in job shops and production environments. Single-end configuration means the tool is replaced when worn rather than indexed.

Key Features

• AlTiN finish provides oxidation resistance and extends tool life in ferrous materials
• 40-degree helix angle promotes smooth chip flow and reduces cutting forces
• Centercutting design allows direct plunge entry into the workpiece
• Micrograin carbide substrate for improved edge retention and toughness
• Extended reach of 2-5/8 inches suits deep-pocket milling setups
• Right-hand cut and right-hand flute for standard CNC and manual mill spindles

Compatibility

Designed as an OEM-style solid carbide end mill for use in standard 5/16-inch ER collet chucks, end mill holders, and shrink-fit tooling systems on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist following standard tool-holding procedures. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Verify collet chuck or holder bore size matches the 5/16-inch shank before tightening to manufacturer torque specifications for the holder type. Inspect the tool for chips or cracks before use, and confirm runout is within acceptable limits using a dial indicator.