CNMG120408-MM5 WMP20G WMP20G Wendeplatten - Walter Tools

Benefit from the combination of Tiger·tec Gold coating, the MM5 chipbreaker and robust Rhombic 80° geometry for secure, productive turning of stainless steel; order the CNMG120408-MM5 WMP20G directly via Metav Werkzeuge or consult our specialists for tailored application advice.

CNMG120408-MM5 WMP20G indexable turning insert for stainless steel — Walter Tools

The CNMG120408-MM5 WMP20G is an indexable turning insert with a negative rake and rhombic 80° form, developed for stable machining of stainless steel in medium to robust cutting conditions.

• Tiger·tec Gold coating for long tool life
• Optimised MM5 chipbreaker for stainless steel
• Rhombic 80° geometry for reliable turning
• 0.8 mm corner radius for balanced surface finish

Longer production runs through hardened edge technology

The combination of the Tiger·tec Gold coating and a WMP20G grade base material ensures prolonged edge life and consistent performance in repetitive operations. By reducing flank wear and maintaining a stable cutting edge, the insert supports higher process reliability and fewer indexings per component run. This results in improved machine uptime and a more predictable tool-change cycle, which is essential for batch production and continuous turning operations.

Secure chip control and thermal resilience for stainless steels

Designed specifically for ISO group M (stainless steel), the MM5 chipbreaker promotes a stable chip flow under the high heat and material ductility typical of stainless grades. The coated carbide substrate minimises the tendency for built-up edge and supports controlled chip segmentation, which lowers the risk of surface damage and improves repeatability. These characteristics translate into fewer rejects and steadier component tolerances when machining challenging alloys.

Geometry that balances strength and surface integrity

The Rhombic 80° shape with a 0.8 mm corner radius and 0° negative rake delivers a robust cutting edge that resists chipping while still generating an acceptable surface finish. The negative rake strengthens the cutting edge for interrupted cuts and heavy cross-sections, while the moderate corner radius provides a compromise between edge strength and finishing capability. For operations that alternate between roughing and semi-finishing, this geometry reduces the need for multiple insert types.

Practical integration and application guidance

As an indexable insert, this grade is compatible with standard CNMG toolholders and simplifies logistics by offering multiple usable edges per insert. The coated construction helps maintain tool life in serial machining environments and supports consistent cycle times. For process adaptation—such as feed and depth selection under specific machine or workpiece setups—Metav Werkzeuge provides application advice and material-specific recommendations to help integrate the insert into existing workflows.

Contact Metav Werkzeuge for application support or quotation on the Walter Tools CNMG120408-MM5 WMP20G insert — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• SKU: CNMG120408-MM5-WMP20G-WALTER
• Designation: CNMG120408-MM5 WMP20G
• Series: Tiger·tec Gold
• Grade: WMP20G
• Manufacturer: Walter Tools

Dimensions & geometry

• Insert size: 12
• Thickness: 04
• Corner radius: 0.8 mm
• Shape: Rhombic 80°
• Rake angle: 0° (negative)

Materials & features

• Coating: Tiger·tec Gold (coated carbide)
• Chipbreaker: MM5
• Application: stainless steel (ISO group M)
• Use case: medium to robust cutting conditions

FAQ

What materials is this insert engineered for?
The CNMG120408-MM5 WMP20G insert is engineered primarily for stainless steel (ISO group M), supporting stable chip formation and reduced built-up edge in ductile, heat-prone alloys.

How does the MM5 chipbreaker benefit machining of stainless steels?
The MM5 chipbreaker promotes controlled chip flow and segmentation when turning stainless steel, which improves surface integrity and lowers the risk of material adhesion on the cutting edge.

What is the advantage of the 80° rhombic geometry?
The Rhombic 80° geometry offers a sturdy cutting stance for versatile turning tasks, enabling reliable performance in both interrupted cuts and continuous operations while maintaining a good balance between strength and finish.

Can the insert handle heavier cuts and interrupted machining?
With a 0° negative rake and a 0.8 mm corner radius, the insert provides reinforced edge strength suited to heavier cross-sections and occasional interruptions, reducing chipping compared with sharper rake alternatives.

Is this insert compatible with standard CNMG toolholders?
Yes, the CNMG designation corresponds to standard CNMG holders; the insert is intended for common toolholder systems that accept CNMG-format indexable inserts.

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for identification only; there is no affiliation between our company and the trademark holders. The offered article is an original, brand-new product from the manufacturer.

Manufacturer: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen; Germany