Harvey Tool 34678 Square End Mill 5/64 in 3 Flute Carbide

Product Description

The HARVEY TOOL 34678 is a solid carbide square end mill designed for precision milling operations in metal, composite, and engineered material applications. With a 5/64 inch (0.078 inch) cutting diameter and a 3 mm (0.118 inch) length of cut, this end mill is built for fine detail work and tight-tolerance slots, pockets, and profiles. The three-flute geometry balances chip evacuation with cutting edge count, making it well-suited for both ferrous and non-ferrous materials. The bright uncoated finish allows for easy wear inspection and works across a range of general-purpose applications without added coating complexity.

This end mill is intended for CNC machining centers and manual mills where small-diameter, high-precision cutting is required. The 1/8 inch shank diameter fits standard collets and tool holders commonly found in production and job shop environments. With a 2.5 inch overall length and a 5/8 inch reach length, the 34678 provides extended reach capability for accessing recessed features without sacrificing rigidity. It is a single-end design, meaning the tool is replaced rather than flipped when the cutting edge is spent.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision milling
• 5/64 inch (0.078 inch) cutting diameter for fine-detail slot and pocket work
• Three right-hand flutes with right-hand cutting direction for efficient chip removal
• 30-degree helix angle balances cutting forces and surface finish quality
• Extended reach design with 5/8 inch reach length for access to recessed features
• Bright uncoated finish suitable for general-purpose milling across multiple material types
• Centercutting capability allows plunge entry directly into the workpiece

Compatibility

Designed as an OEM-style replacement and general-use solid carbide square end mill compatible with standard 1/8 inch collets and tool holders on CNC machining centers and manual mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the 1/8 inch shank fully in the collet or tool holder to the recommended grip length before torquing the retention nut. Confirm runout with a dial indicator before beginning a production cut, as small-diameter end mills are sensitive to collet wear and improper seating.