Harvey Tool 34820-C3 Corner Radius End Mill 3/16 in 4 Flute

Product Description

The HARVEY TOOL 34820-C3 is a solid carbide corner radius end mill designed for precision milling in demanding metalworking applications. It features a 3/16-inch diameter, a 0.5 mm (0.0200-inch) corner radius, and 4 right-hand spiral flutes with a 30-degree helix angle. The cutting edges are AlTiN coated via PVD process, improving heat resistance and tool life in abrasive materials. With a 5/8-inch length of cut and 2-inch overall length, this is a stub-to-standard length tool suited for tight-clearance work. It is centercutting and capable of both roughing and finishing passes in a single tool setup. Licensed machinists and CNC operators are the primary installers.

This end mill is suited for use in CNC machining centers and manual milling machines across a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, and composite materials. The miniature diameter makes it well-suited for small-feature milling, slot cutting, and profile work where larger tools cannot reach. It is part of the Harvey Tool Miniature End Mills - Corner Radius - Stub and Standard series, which targets high-precision work in tool-and-die, aerospace, and general metalworking environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous and non-ferrous applications
• AlTiN PVD coating improves thermal resistance and extends tool life in steel and stainless steel
• 0.5 mm corner radius reduces stress concentration and improves surface finish at part corners
• Centercutting design allows plunge entry and full-slot milling without a pilot hole
• Right-hand cut, right-hand spiral with 30-degree helix for efficient chip evacuation
• Normal pitch, no chipbreaker, no coolant-through - optimized for light-duty miniature work

Compatibility

Designed for use with standard straight-cylindrical toolholders accepting a 3/16-inch shank diameter. Compatible with CNC machining centers and manual mills equipped with appropriate collet or end mill holders. Part of the Harvey Tool Miniature End Mills - Corner Radius - Stub and Standard series.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the toolholder is clean and free of debris before inserting the end mill. Verify runout with a dial indicator after installation, as excessive runout on a miniature-diameter tool accelerates wear and can cause premature breakage. Follow the tool manufacturer's recommended speeds and feeds for the specific workpiece material being cut.