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The HARVEY TOOL 878445 is a solid carbide chamfer mill designed for chamfering, deburring, and edge-breaking operations on a wide range of workpiece materials. The tool features a 4 mm cutter head diameter and a 2-flute, right-hand cutting geometry that delivers clean, consistent chamfer profiles in both manual and CNC machining environments. With an overall length of 50 mm and a matching 4 mm shank diameter, it mounts directly into standard collets and tool holders without adapters. The bright, uncoated finish is well-suited for non-ferrous metals, plastics, and general-purpose machining where a coating is not required. Machinists and tool-and-die professionals specify this tool for precision edge preparation work.
This chamfer mill is appropriate for use in CNC machining centers, manual knee mills, and drill-press setups where controlled chamfer depth is required. Its compact 4 mm diameter makes it practical for tight-clearance features and small-bore chamfering. The solid carbide construction maintains rigidity and cutting accuracy even at higher spindle speeds. Typical applications include chamfering threaded holes, preparing mating surfaces, and deburring drilled or milled edges in production and job-shop environments.
Designed as an OEM-style solid carbide chamfer mill compatible with standard 4 mm collet chucks and ER-style tool holders used in CNC machining centers and manual milling machines.
Installation should be performed by a qualified machinist following standard tooling change procedures. Ensure the spindle is fully powered down and at a complete stop before seating or removing the tool. Seat the shank fully into the collet or tool holder and torque the retention nut to the tool holder manufacturer's specification. Verify runout with a dial indicator before beginning a production run to confirm proper seating and minimize tool deflection.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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