Harvey Tool 871308 Square End Mill 1/8 in 4 Flute Carbide

Product Description

The HARVEY TOOL 871308 is a solid carbide square end mill designed for high-performance milling in abrasive and non-ferrous materials. With a 1/8 inch cutting diameter and a CVD diamond coating, this tool delivers exceptional wear resistance and thermal stability during demanding machining operations. It features 4 flutes with a 30-degree right-hand helix for efficient chip evacuation and a smooth surface finish. The 1/2 inch length of cut and 2.5 inch overall length make it suitable for tight-tolerance work in compact setups. Machinists and CNC operators in job shops, aerospace, and composite machining environments are the primary users of this tool.

This end mill is suited for milling graphite, carbon fiber, fiberglass, green ceramics, and other highly abrasive non-ferrous materials where conventional coatings fail prematurely. The CVD diamond coating significantly extends tool life in these applications compared to uncoated or PVD-coated carbide. It is a single-end, non-centercutting tool, so plunge milling directly into solid material is not recommended. Typical use cases include slotting, profiling, and finishing passes on abrasive composites in CNC machining centers.

Key Features

• CVD diamond coating for maximum wear resistance in abrasive materials
• Solid carbide construction for rigidity and dimensional accuracy
• 4-flute, 30-degree right-hand helix for efficient chip evacuation
• 1/8 inch cutting diameter with 1/2 inch length of cut for precision work
• Non-centercutting geometry — not designed for direct plunge entry
• Right-hand cutting direction compatible with standard CNC spindle rotation

Compatibility

Designed as a direct-fit replacement or standard tooling selection for CNC machining centers accepting a 1/8 inch shank diameter. Best suited for spindles and collets sized for 1/8 inch tooling.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the spindle is fully powered down and locked out before changing tooling. Use a properly sized collet or end mill holder rated for 1/8 inch shank diameter and torque to the machine manufacturer's specification. Because this tool is non-centercutting, avoid direct plunge operations — use ramping or helical interpolation entry strategies instead.