CNMG120408-MS3 WMP20S WMP20S Wendeplatten - Walter Tools

Take advantage of the robust edge security, Tiger‑tec Silver coating and precise chip control for reliable turning of stainless steels; order directly via Metav Werkzeuge or consult our application specialists for tailored recommendations

CNMG120408‑MS3 WMP20S turning insert — Rhombus 80°, 0.8 mm radius (Walter Tools)

The CNMG120408‑MS3 WMP20S is an indexable turning insert designed for demanding stainless steel applications, combining a Tiger‑tec Silver coated carbide grade with a MS3 chipbreaker for stable machining.

• Tiger‑tec Silver coating for wear resistance
• Optimised for stainless steel machining
• Rhombus 80° form with 0.8 mm corner radius
• 0° (negative) rake for robust cutting edges

High process reliability for stainless steel turning

The Tiger‑tec Silver‑based grade WMP20S provides a balanced combination of wear resistance and toughness specifically for stainless steel. Thanks to the coating and substrate pairing, the insert supports secure chip formation and reduces the tendency for built‑up edge in sticky, work‑hardening materials. This results in a consistently stable cut, which translates into fewer tool changes and more predictable cycle times on production runs. The description emphasises measurable process benefits rather than promises: improved edge life and repeatable performance under medium to robust conditions.

Robust geometry that protects the cutting edge

With a Rhombus 80° outline and a 0° (negative) rake, the insert is engineered to withstand interrupted cuts and heavier feed conditions. The negative rake increases edge strength, making the insert suitable where a more durable cutting geometry is required. The 0.8 mm corner radius provides a larger cutting edge contact, improving surface finish on roughing passes while preserving the integrity of the edge under higher loads. These geometric choices are practical solutions to common workshop challenges when machining tough stainless alloys.

Chip control and machining stability explained

The integrated MS3 chipbreaker is tailored to the physical behaviour of stainless steel, assisting in breaking and evacuating chips reliably even at varying depths of cut. Proper chip control lowers the risk of re‑cutting and tool damage, increasing component quality and shopfloor safety. For users less familiar with chipbreaker nomenclature: the term refers to the engineered groove and land geometry on the insert face that shapes and segments metal chips during cutting, helping maintain stable temperatures and more consistent cutting forces.

Practical fitment and application notes

The insert follows the standard CNMG form factor (ISO CNMG120408‑MS3), making it compatible with conventional indexable toolholders that accept 80° rhombic inserts. The designation and WMP20S grade identify its intended material group (M – stainless steels) and coating family. Where machining parameters are a concern, Metav Werkzeuge can provide guidance on feeds and speeds to exploit the insert’s advantages while ensuring process safety and productivity.

Discuss machining requirements with Metav Werkzeuge to select Walter Tools Tiger‑tec Silver inserts optimised for stainless steel and receive application support by e‑mail or phone: info@metav-werkzeuge.com / +49 2822 7131930

Technical Data

• SKU: CNMG120408‑MS3‑WMP20S‑WALTER
• ISO designation: CNMG120408‑MS3 WMP20S
• Manufacturer: Walter Tools

Data

• Size: 12
• Thickness: 04
• Corner radius: 0.8 mm
• Free angle: 0° (negative)
• Geometry: Rhombus 80°

Special features

• Coating: Tiger‑tec Silver (coated carbide)
• Grade: WMP20S
• Chipbreaker: MS3
• Application: Stainless steel
• Series: Tiger‑tec Silver

FAQ

What materials is this insert intended for?
The CNMG120408‑MS3 WMP20S is formulated for machining stainless steel (ISO group M) and supports medium to robust cutting conditions.

How does the MS3 chipbreaker improve machining?
The MS3 chipbreaker helps shape and evacuate chips during cutting, improving thermal behaviour and reducing the risk of built‑up edge when turning stainless steels with the WMP20S grade.

Is the insert compatible with standard CNMG toolholders?
Yes; the ISO form CNMG120408‑MS3 ensures compatibility with conventional 80° rhombic toolholders designed for CNMG inserts.

What benefits does the Tiger‑tec Silver coating provide?
Tiger‑tec Silver enhances wear resistance and edge stability for the WMP20S grade, supporting longer tool life under demanding stainless steel machining.

What is the effect of the 0° (negative) rake?
A 0° (negative) rake increases edge robustness, making the insert more tolerant of heavier depths of cut and intermittent machining, while maintaining consistent performance.

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

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