Promax 120-03212 Corner Radius End Mill 1/2 in 4 Flute

Product Description

The PROMAX 120-03212 is a single-end, corner radius end mill engineered for combined roughing and finishing operations in one pass. Built from micrograin solid carbide and coated with TiCN (Titanium Carbonitride), it delivers extended tool life and heat resistance in ferrous and non-ferrous materials. The 0.02-inch corner radius reduces stress concentration at the cutting edge and helps minimize chipping on aggressive cuts. With a 40-degree helix angle and four right-hand flutes, it generates efficient chip evacuation and a smooth surface finish. Licensed machinists and CNC operators in job shops, production machining, and tool rooms are the primary users of this end mill.

This end mill suits milling operations where both material removal rate and surface quality are required in the same setup. The 1/2-inch diameter and 1-1/4-inch length of cut make it well suited for peripheral milling, slotting, and profiling in medium-depth passes. The Weldon Flat shank provides positive drive and resists pullout in high-feed applications. It is center-cutting, allowing plunge entry directly into the workpiece without a pre-drilled pilot hole.

Key Features

• Micrograin solid carbide substrate for rigidity and wear resistance
• TiCN coating extends tool life and reduces friction in ferrous materials
• 0.02-inch corner radius reduces edge chipping and stress concentration
• 40-degree helix angle promotes efficient chip evacuation and smooth finish
• Center-cutting geometry allows direct plunge milling
• Weldon Flat shank for secure, positive-drive tool holding

Compatibility

Designed as a Series 120 solid carbide corner radius end mill for use in standard 1/2-inch end mill holders and Weldon-style tool holders on CNC machining centers and manual knee mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the Weldon Flat fully in the holder and tighten the set screw to the tool holder manufacturer's specification. Verify runout with a dial indicator after mounting to confirm proper seating before beginning a cut.