CNMG120412-RM5 WSM20S WSM20S Wendeplatten - Walter Tools

Take advantage of a proven combination of high wear resistance and stable chip control to keep machining schedules predictable; the insert’s robust geometry and Tiger‑tec Silver grade support productive turning of stainless and heat‑resistant alloys — order through Metav Werkzeuge for fast availability and expert application advice.

Drehwendeschneidplatte CNMG120412-RM5 WSM20S — Tiger‑tec Silver insert by Walter Tools

A robust CNMG turning insert designed for heavy and demanding cuts in stainless steels and heat‑resistant alloys, featuring the WSM20S grade and an RM5 chipbreaker for controlled chip formation

• CNMG geometry, Rhombus 80°
• Tiger‑tec Silver coating WSM20S
• Chipbreaker RM5 for stable chip control
• Negative rake 0° for heavy cuts

Predictable performance in stainless and superalloys

The combination of the Tiger‑tec Silver coating and the WSM20S grade has been engineered to resist thermal and mechanical wear when machining difficult materials. The insert is specified for the ISO groups M (stainless steels) and S (heat‑resistant superalloys and titanium), so the cutter grade is tailored to avoid built‑up edge and to maintain a stable cutting edge under elevated temperatures. This results in fewer tool changes and more consistent component quality, improving overall process efficiency and reducing unexpected downtime.

Stable chip control and improved surface quality

The RM5 chipbreaker promotes controlled chip segmentation, which supports secure evacuation of swarf and reduces the risk of chip interference. Combined with the Rhombus 80° CNMG geometry and a corner radius 1.2, the insert offers a balance between edge robustness and surface finish. The 0° negative rake increases toughness at the cutting edge, making this insert suitable for heavier cuts and interrupted machining while still enabling reliable workpiece surfaces and consistent dimensional results.

Engineered for reproducible tool life and productivity

Using a coated carbide grade designed for demanding applications means tool life becomes more predictable across batch sizes. The insert’s construction delivers a reliable cutting edge and optimised wear resistance, which supports higher machine utilisation and improved scrap rates. For production environments where cycle time and repeatability are critical, this turning insert helps to lower unit machining costs through longer life and fewer in‑process interventions.

Simple integration and application guidance

The CNMG form fits standard toolholders designed for rhombic 80° inserts and the plate dimensions simplify inventory management. The combination of chipbreaker RM5, the WSM20S grade and the insert’s geometry makes it appropriate for wet and dry turning strategies depending on the machine set‑up and workpiece material. Application parameters should be selected with regard to workpiece grade and rigidity; for tailored cutting data and feed/speed recommendations, technical consultation is advised to guarantee optimal results with minimal set‑up time.

Contact Metav Werkzeuge for personalised cutting data and to confirm the best Walter Tools CNMG120412-RM5 WSM20S insert for the intended material and machining strategy

Technical data

• Article number: CNMG120412-RM5-WSM20S-WALTER
• Label: Drehwendeschneidplatte CNMG120412-RM5 WSM20S Walter Tools
• Product type: Drehwendeschneidplatte (turning indexable insert)
• Brand: Walter Tools
• Series: Tiger‑tec Silver
• Grade: WSM20S

Core measurements

• Geometry: CNMG120412-RM5
• Plate form: Rhombus 80°
• Corner radius: 1.2
• Relief angle: 0° (negative)
• Plate size: 12
• Plate thickness: 04
• Tolerance class: M

Materials & features

• Applicable groups: S / M
• Suitable for: stainless steel (M)
• Suitable for: heat‑resistant superalloys and titanium (S)
• Chipbreaker: RM5
• Coating: Tiger‑tec Silver
• Material: coated carbide

FAQ

Which materials are recommended for this insert?
The CNMG120412-RM5 WSM20S insert from Walter Tools is specified for ISO groups M and S, meaning it is suitable for stainless steels and heat‑resistant superalloys/titanium, where heat resistance and stable edge behaviour are required.

How does the RM5 chipbreaker affect machining?
The RM5 chipbreaker on this turning insert promotes predictable chip formation and safe evacuation, which improves surface quality and reduces the risk of chip entanglement, especially in long or discontinuous cuts.

What advantages does the Tiger‑tec Silver WSM20S grade provide?
The WSM20S grade combines a wear‑resistant coating with substrate toughness to improve edge stability at elevated temperatures, extending tool life when machining demanding materials.

Is the insert suitable for heavy and interrupted cuts?
Yes; the 0° negative rake and rhombic CNMG geometry increase edge strength, making the insert well suited to heavier feeds, interrupted cuts and applications where robustness is essential.

Which holders and set‑ups are compatible?
The geometry conforms to standard CNMG toolholder systems for 80° rhombic inserts; the plate thickness and size align with common turning toolholder designs to enable straightforward mounting and repeatable set‑up.

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

The Walter AG (brand appearance: Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Swedish Sandvik Group. Protected trademarks and trade names remain the property of their respective owners. Brand names and protected product names are used solely for explanatory purposes. There is no connection between our company and the mentioned brands. The offered article is original, factory‑new goods from the manufacturer.