CNMG120402-FM5 WSM20S WSM20S Wendeplatten - Walter Tools

Take advantage of a high-performance combination of Tiger·tec Silver coating and the WSM20S grade for secure chip control and sustained edge stability when machining stainless steels and heat-resistant superalloys; order the insert via Metav Werkzeuge or contact our technical advisors for tailored application advice.

CNMG120402-FM5 WSM20S indexable turning insert — Tiger·tec Silver, Rhombus 80° (Walter Tools)

The CNMG120402-FM5 WSM20S is an indexable turning insert engineered for reliable chip formation and robust cutting under the thermal and mechanical demands of stainless steels and heat-resistant superalloys.

• Tiger·tec Silver coated carbide
• Optimised for stainless steels and superalloys
• Rhombic 80° geometry for versatile turning
• FM5 chipbreaker for stable chip control

Longer tool life through thermal-resistant coating

The applied Tiger·tec Silver technology and the WSM20S grade form a coating/substrate combination that improves wear resistance and reduces flank wear in difficult-to-cut materials. This coated carbide construction is designed to withstand elevated cutting temperatures typical when machining stainless steels and superalloys, so the result is a consistently longer tool life and fewer indexings per workpiece. For industrial production this means reduced tool-change downtime and improved process economy.

Predictable chip control and improved surface quality

The FM5 chipbreaker is specifically shaped to produce short, manageable chips and to promote a steady material flow away from the cutting zone. Combined with the 0.2 mm corner radius, this geometry supports a fine finish on the workpiece while avoiding unwanted build-up on the edge. The outcome is not only more consistent surface quality but also fewer workpiece rejections — a direct contribution to higher productivity and lower follow-up costs.

Robust geometry for demanding operations

The Rhombus 80° insert form and 0° negative relief provide a mechanically strong cutting edge that tolerates interrupted cuts and variable engagement angles. This negative-rake arrangement increases edge stability and reduces chipping under shock loads, offering dependable performance in heavy roughing as well as finishing passes. The insert thickness and tolerance class ensure repeatable seating in standard indexable toolholders for a secure clamping interface.

Application-focused versatility and process security

Specified for the ISO groups M (stainless steels) and S (heat-resistant superalloys and titanium), the insert supports a broad material spectrum encountered in aerospace, energy and demanding general engineering tasks. The grade’s composition and the chipbreaker design together enhance process security by promoting stable cut conditions and reliable chip evacuation, which helps maintain consistent cycle times and repeatable part quality across batches.

Discuss the Walter Tools CNMG120402-FM5 WSM20S insert with Metav Werkzeuge to evaluate the best grade and cutting data for the intended stainless steel or superalloy application and to optimise tool life and productivity.

Technical data

• SKU: CNMG120402-FM5-WSM20S-WALTER
• Product type: indexable turning insert
• Designation: CNMG120402-FM5 WSM20S
• Brand: Walter Tools

Core specifications

• Insert shape: Rhombus 80°
• Corner radius: 0.2 mm
• Relief angle: 0° (negative)
• Thickness: 04
• Grade: WSM20S
• Chipbreaker: FM5
• Tolerance class: M

Designs and special features

• Coating/series: Tiger·tec Silver
• Coated carbide cutting material
• Application groups: M (stainless steels), S (superalloys/titanium)
• Robust geometry for interrupted cuts
• Optimised for secure chip formation and surface finish

FAQ

What materials is this insert suited for?
The CNMG120402-FM5 WSM20S insert is specified for stainless steels (ISO group M) and heat-resistant superalloys/titanium (ISO group S), reflecting the WSM20S grade and Tiger·tec Silver coating.

How does the FM5 chipbreaker help in machining?
The FM5 chipbreaker on the CNMG120402-FM5 promotes short, controllable chips and steady chip flow, reducing the risk of entanglement and improving consistency of surface finish.

Is the 0° relief suitable for interrupted cuts?
Yes; the 0° (negative) relief increases edge robustness, making the insert appropriate for interrupted cutting and operations with variable engagement.

Which toolholders are compatible with this CNMG insert?
The CNMG geometry is compatible with standard CNMG-compatible turning toolholders; ensure correct seat and clamping per the toolholder manufacturer's guidance when using the CNMG120402-FM5 WSM20S.

What finish quality can be expected with a 0.2 mm corner radius?
A 0.2 mm corner radius supports fine finishing passes by reducing micro-chatter while maintaining a sharp cutting edge; it balances surface quality with edge strength for consistent results.

Manufacturer/Responsible: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen