Harvey Tool 897939 Square End Mill 1mm 3 Flute Carbide

Product Description

The HARVEY TOOL 897939 is a single-end square end mill ground from solid carbide and designed for precision milling in ferrous and non-ferrous materials. The cutter runs a 1 mm (0.0390 inch) diameter with a 9/32 inch (0.281 inch) length of cut and a 30-degree helix angle. Three flutes provide a balance of chip evacuation and finish quality at small diameters. The bright, uncoated finish makes it straightforward to inspect for wear and suits applications where coating buildup or heat transfer to the workpiece is a concern. Right-hand cutting and right-hand flute direction are standard. Overall length is 2-1/2 inches with a 1/8 inch shank diameter, fitting standard collet tooling.

This end mill is suited for fine detail milling, slot cutting, and profiling passes in CNC machining centers and precision manual mills. The 1 mm diameter makes it appropriate for micro-feature work, engraving-depth slots, and tight-radius internal profiles where larger tooling cannot reach. It is a non-centercutting tool, so plunge entry into solid material is not recommended. Machinists working in prototype shops, mold and die, or high-precision production environments are the primary users of this tool size.

Key Features

• 1 mm (0.0390 inch) cutting diameter for micro and fine-detail milling
• Solid carbide construction for rigidity and wear resistance at small diameters
• 3-flute geometry balances chip clearance and surface finish
• 30-degree right-hand helix with right-hand cutting direction
• Bright, uncoated finish — easy wear inspection, no coating interaction
• Non-centercutting design — peripheral and slot milling only, no plunge entry

Compatibility

Designed as a precision replacement or production end mill for CNC machining centers and manual mills accepting a 1/8 inch collet or end mill holder.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the spindle fully powered off and locked out. Ensure the 1/8 inch shank seats fully and evenly in the collet before torquing the nut to the machine manufacturer's specification. At 1 mm diameter, runout at the collet face is critical — verify with a dial indicator before cutting. Handle micro-diameter carbide tooling carefully; carbide is brittle and chips from impact or improper clamping pressure.