Walter 6463374 CCMT21.51-FM4 WMP20S Turning Insert

Product Description

The WALTER 6463374 is a solid carbide turning insert in the CCMT21.51-FM4 WMP20S configuration, designed for precision metal cutting in CNC turning, facing, and boring operations. It features a triple-layer CVD coating of TiCN, Al2O3, and TiCN under the proprietary WMP20S Tiger-tec Silver grade, which provides heat resistance and wear performance across a range of ferrous materials. The insert has an 80-degree diamond shape with a positive rake angle of 6 degrees and a 7-degree relief angle, delivering clean, controlled chip formation in demanding production environments. It is held in place by a screw-clamping method and carries an M tolerance and C clearance code.

This insert is suited for medium-duty turning and finishing passes on steel and stainless steel as primary workpiece materials, with secondary capability on super-alloys and titanium. The FM4 chip breaker geometry is optimized for stable chip control across these material groups. Typical applications include external turning, facing, and light boring in ISO P, M, and S material categories. It is used by CNC machinists and tool-room technicians in both production and job-shop environments.

Key Features

• Triple-layer CVD coating: TiCN, Al2O3, TiCN under WMP20S Tiger-tec Silver grade for extended tool life on steel and stainless steel
• 80-degree diamond insert shape with positive rake for reduced cutting forces
• FM4 chip breaker geometry for controlled chip evacuation across ISO P, M, and S materials
• 2 usable cutting edges per insert for cost efficiency
• Screw-clamp holding method for secure, repeatable seating in compatible toolholders
• Multi-use geometry supports turning, facing, and boring without insert change

Compatibility

Compatible with CCMT-style screw-clamp toolholders conforming to ANSI and ISO standards for CCMT060204 inserts. ISO equivalent designation is CCMT060204-FM4 WMP20S. Verify toolholder seat geometry and pocket dimensions before installation.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before seating or removing the insert. Use the correct torque wrench and manufacturer-specified clamp screw to avoid cracking the carbide substrate - refer to the toolholder OEM documentation for clamp torque values. Inspect the pocket seat for chips or debris before installing a new insert.