Htc 120-4312 Square End Mill 5/16 in 4 Flute Solid Carbide

Product Description

The HTC 120-4312 is a solid carbide square end mill designed for precision milling operations in metal, composites, and engineered materials. With a 5/16 inch mill diameter and 4-flute helical geometry, it delivers clean, accurate cuts in both slotting and peripheral milling applications. The bright, uncoated finish is suited to applications where coating buildup or heat sensitivity is a concern. At 2.5 inches overall length with a 7/8 inch length of cut, this is a standard-reach tool built for rigid setups where chatter control and surface finish are priorities. Solid carbide construction provides the stiffness and wear resistance required for consistent performance across production runs.

This end mill is intended for use in CNC machining centers and manual mills where right-hand cutting and right-hand helical flutes are standard. It fits applications in job shops, tool rooms, and production environments handling ferrous and non-ferrous workpieces. The 5/16 inch shank diameter matches the 5/16 inch mill diameter for direct collet chucking without reduction bushings. It is a single-end, non-centercutting tool, meaning it is not designed for direct plunge entry and should be used with ramp or helical entry strategies when full-depth engagement is required.

Key Features

• Solid carbide construction for rigidity and extended tool life
• 4-flute helical geometry improves surface finish and chip evacuation
• Bright, uncoated finish suitable for dry cutting or standard cutting fluid applications
• Right-hand cut and right-hand flute direction for standard spindle operation
• Non-centercutting design - requires ramp or helical entry for plunge moves
• Standard length profile reduces deflection in rigid setups

Compatibility

Designed as an OEM-style solid carbide square end mill suitable for use in standard ER and straight-bore collet systems accepting a 5/16 inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank to the recommended minimum engagement depth in the collet or chuck per the toolholder manufacturer guidelines. Verify runout at the tool tip after clamping before beginning the cut, as excessive runout accelerates wear and degrades surface finish.