Promax US007077 Corner Radius End Mill 3/8 in 4 Flute

Product Description

The PROMAX US007077 is a solid carbide corner radius end mill designed for high-performance material removal across a wide range of metalworking applications. Built on the US007 series platform, it features a 3/8-inch shank diameter, a 7/8-inch length of cut, and a 0.020-inch corner radius that reduces stress concentrations at the cutting edge. The PowerLayer coating extends tool life by improving hardness and heat resistance at the cutting zone. With four flutes, a variable helix, and a variable index, this end mill is engineered for both roughing and finishing passes in a single setup. Center-cutting geometry allows for direct plunge entry.

This end mill is suited for milling steel, stainless steel, cast iron, superalloys, titanium, and non-ferrous metals in precision machining environments. The coarse pitch and right-hand spiral flutes promote efficient chip evacuation, making it a practical choice for production shops, tool rooms, and job shops running CNC vertical machining centers or manual mills. The straight-cylindrical shank seats directly in standard toolholders. It is a single-end, stub-length configuration appropriate where rigidity and minimal overhang are priorities.

Key Features

• Solid micrograin carbide construction for rigidity and wear resistance in ferrous and non-ferrous materials
• PROMAX PowerLayer coating improves surface hardness and thermal protection at the cutting edge
• Variable helix and variable index design reduces harmonic vibration during aggressive cuts
• Center-cutting geometry permits direct plunge milling without a pre-drilled entry point
• 0.020-inch corner radius reduces edge chipping and extends tool life on profiling operations
• Compatible with roughing and finishing operations, eliminating the need for separate tool changes

Compatibility

Designed for use with standard straight-bore toolholders accepting a 3/8-inch cylindrical shank. Suitable for CNC machining centers and manual mills running steel, stainless steel, cast iron, superalloys, titanium, and non-ferrous metal workpieces.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the machine spindle is fully stopped and the tool changer is disabled before inserting or removing the end mill from the toolholder. Verify shank seating depth and runout with a dial indicator before initiating any cut. Follow the machine tool manufacturer's guidelines for speeds, feeds, and clamping torque appropriate to the toolholder type in use.