Walter 5205206 Indexable Square-shoulder End Mill

Product Description

The WALTER 5205206 is an indexable square-shoulder end mill designed for precision milling operations across a wide range of workpiece materials. Built around the F4042 toolholder cutter style, it accepts AD.T 1204.. insert style inserts secured by screw-held mounting. The cutter diameter measures 0.75 inches with a matching 0.75 inches Weldon flat shank, and an overall length of 3.061 inches. Maximum depth of cut is 0.461 inches (11 millimeters). The 90-degree lead angle produces true square shoulders, making this tool well suited for facing, slotting, and step-milling operations. Licensed machinists and CNC programmers install and qualify this type of toolholder on vertical and horizontal machining centers.

This end mill is intended for universal primary workpiece materials covering cast iron, stainless steel, non-ferrous metals, and steel, corresponding to material codes K, M, N, P, and S. It also handles secondary materials including glass, graphite, and hard materials (codes H and O). The two-flute configuration supports chip clearance in moderate-to-heavy material removal passes. Coolant delivery is normal pressure through standard machine spindle supply. The ISO catalog number for this toolholder is F4042.UW19.019.Z02.11, which machinists can cross-reference in Walter catalog documentation to confirm insert and adapter fitment.

Key Features

• 90-degree lead angle for true square-shoulder milling profiles
• Accepts AD.T 1204.. insert style with screw-held insert retention
• Weldon flat shank for positive rotational drive in end mill holders
• 2-flute, 2-insert design optimized for chip evacuation and rigidity
• Compatible with universal and hard secondary workpiece materials
• Normal-pressure coolant-through capability for thermal management during cutting

Compatibility

This toolholder uses the AD.T 1204.. insert style and is cataloged under ISO number F4042.UW19.019.Z02.11. It is designed for use as the F4042 cutter body platform. Confirm shank diameter and holder bore sizing match your machine spindle before installation.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Always power down and lock out the machine spindle before inserting or changing toolholders. The Weldon flat shank requires a set-screw side-lock holder torqued to the machine tool manufacturer's specification. Verify insert seating and screw torque before running at full spindle speed, and confirm depth-of-cut settings do not exceed the 0.461 inches maximum.