Accupro 12183660 Square End Mill 5/16 in 4 Flute Carbide

Product Description

The ACCUPRO 12183660 is a solid carbide square end mill designed for precision milling operations in metal, composites, and other hard materials. The micrograin carbide construction provides edge retention and rigidity in demanding cutting environments. It features a 5/16 inch cutting diameter with a 1-1/2 inch length of cut and a 6 inch overall length, placing it in the extra-long category for reach into deep pockets or extended-clearance setups. The 4-flute spiral design with a 40-degree helix angle balances chip evacuation with surface finish quality. Centercutting geometry allows the tool to plunge as well as profile. This end mill is used by machinists and CNC operators across production and job-shop environments.

This end mill suits vertical and horizontal milling machines as well as CNC machining centers running ferrous and non-ferrous materials. The extra-long 6 inch OAL makes it well suited for deep-pocket milling, tall-workpiece profiling, and applications where standard-length end mills cannot reach. The uncoated finish is appropriate for use with cutting fluids in applications where coating adhesion or heat buildup is not the primary concern. Right-hand cut and right-hand flute geometry follow conventional spindle rotation standards on most production equipment.

Key Features

• Solid micrograin carbide construction for edge retention and rigidity
• 4 spiral flutes with 40-degree helix angle for balanced chip evacuation and finish
• Centercutting design allows plunge entry without a pre-drilled pilot hole
• Extra-long 6 inch OAL extends reach for deep-pocket and tall-workpiece applications
• Right-hand cut, right-hand flute — compatible with standard CNC spindle rotation
• Uncoated surface suitable for flood-coolant wet-cutting applications

Compatibility

Designed as a standard shank end mill for use in collet chucks, end mill holders, and shrink-fit tooling accepting a 5/16 inch shank diameter on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the control is in E-stop or lockout before loading or removing the tool. Seat the shank fully into the holder to the minimum engagement depth recommended by the holder manufacturer, and verify runout with a dial indicator before cutting. Observe the mill diameter tolerance of +0.000/-0.002 inches and shank tolerance of -0.0001/-0.0004 inches when selecting mating toolholders to maintain concentricity.