Harvey Tool 74343-C3 Ball End Mill 1.10mm 4 Flute Carbide

Product Description

The HARVEY TOOL 74343-C3 is a miniature solid carbide ball end mill designed for precision milling in steel, stainless steel, and cast iron. The cutter measures 1.10 mm (0.0430 inches) in diameter with a 0.1290-inch length of cut and a 1.5000-inch overall length. A 30-degree right-hand spiral helix and a 4-flute geometry support both roughing and finishing operations. The AlTiN PVD coating extends tool life in ferrous and abrasive materials. The 0.1250-inch straight-cylindrical shank mounts in standard 1/8-inch collets or shrink-fit toolholders. Installed by CNC machinists and toolroom operators working in high-precision, small-feature applications.

This end mill fits residential and industrial CNC machining applications where tight tolerances and small-diameter cutting are required. It is suited for die and mold work, medical component machining, and aerospace detail parts where feature sizes demand sub-2 mm tooling. The single-end, stub-to-standard reach design keeps deflection low in shallow-pocket and contour work. The centercutting geometry allows plunge entry, adding flexibility in 3D profiling and cavity work on steel and stainless steel workpieces.

Key Features

• 1.10 mm (0.0430 inches) ball end diameter with a 0.0215-inch nose radius for small-radius contour work
• 4-flute solid carbide construction for rigidity and chip load capacity in ferrous materials
• AlTiN PVD coating rated for steel, stainless steel, and cast iron applications
• 30-degree right-hand helix with right-hand cutting direction for smooth chip evacuation
• Centercutting design allows direct plunge entry without a pre-drilled pilot hole
• Straight-cylindrical 0.1250-inch shank compatible with standard 1/8-inch collet toolholding

Compatibility

Designed for use on steel, stainless steel, and cast iron workpieces. Part of the Harvey Tool Miniature End Mills - Ball - Stub and Standard series. Fits standard 1/8-inch collet chucks and shrink-fit holders with a 0.1250-inch bore.

Installation Notes

Install in a clean, properly sized collet or shrink-fit holder to minimize runout, which is critical at sub-2 mm diameters. Confirm holder bore matches the 0.1250-inch shank before tightening. Power down and lock out the spindle before any tool change. At this diameter, excessive overhang or side load will cause tool breakage — keep reach to the minimum required for the cut.