Htc 200-4312 Square End Mill 5/16 in 4 Flute Solid Carbide

Product Description

The HTC 200-4312 is a double-end, solid carbide square end mill designed for precision milling operations in metalworking and machining applications. With a mill diameter of 5/16 inches and a length of cut of 1/2 inch, this stub-length tool delivers rigid, accurate cutting in confined setups where chatter and deflection must be minimized. The tool features four helical flutes with right-hand cutting and right-hand flute direction, and carries an AlTiN (aluminum titanium nitride) coating that extends tool life under high-heat cutting conditions. It is intended for use by machinists and CNC operators working in job shop, production, or toolroom environments.

The 200-4312 is well suited for milling ferrous metals, hardened steels, and other demanding materials where AlTiN coating provides thermal resistance and reduced friction. Its stub-length configuration and 5/16-inch shank diameter make it appropriate for setups requiring extra stiffness and reduced overhang. The double-end design offers two usable cutting ends, extending the working life of each tool. This end mill fits standard ER or straight-bore collet systems sized for a 5/16-inch shank and is a practical choice for slot milling, profiling, and peripheral cuts in tight-tolerance work.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard material cutting
• AlTiN coating provides high-heat resistance and extended tool life in dry or semi-dry cutting
• Four helical flutes with right-hand cut and right-hand helix for efficient chip evacuation
• Double-end design delivers two cutting ends per tool
• Stub-length (Series 200) geometry reduces deflection in demanding setups
• Square shank, 5/16-inch diameter fits standard collet toolholders

Compatibility

Designed as an OEM-style solid carbide square end mill compatible with standard 5/16-inch straight-bore or ER collet toolholders used in CNC machining centers and manual mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator familiar with end mill setup and runout tolerance requirements. Ensure the spindle and toolholder are clean and free of debris before seating the shank. Secure the end mill to the manufacturer-specified collet torque using a calibrated torque wrench and appropriate collet nut wrench. Verify runout with a dial test indicator before beginning a cut, and confirm that cutting parameters match the workpiece material and coating recommendations for AlTiN-coated tooling.