CNMG160616-MK5 WKK20S Wendeplatten - Walter Tools

Take advantage of a high‑productivity solution for cast iron: the coated WKK20S grade delivers stable chip formation and extended tool life while the rhombic 80° geometry with a 1.6 mm corner radius ensures consistent dimensional control. Order the CNMG160616‑MK5 WKK20S directly via Metav Werkzeuge or consult the technical team for application support.

CNMG160616-MK5 WKK20S — Turning insert for cast iron, Walter Tools

CNMG160616‑MK5 WKK20S is a rhombic 80° turning insert engineered for productive machining of cast iron in heavy and interrupted cuts

• Tiger‑tec Silver coated cemented carbide
• Optimised for cast iron machining
• Rhombic 80° form, 1.6 mm corner radius
• Negative 0° rake, MK5 chipbreaker

High productivity through geometry and form

The rhombic 80° form and the 1.6 mm corner radius provide a robust cutting edge that tolerates interrupted cuts and varying engagement angles. The combination of the CNMG format and a negative 0° rake angle yields a stable cutting direction and reduced tendency for edge chipping, which is particularly advantageous when turning abrasive cast iron. This geometry translates into fewer tool changes and consistent workpiece tolerances, supporting continuous, high‑throughput production.

Coating and grade designed for abrasive materials

The Tiger‑tec Silver coating applied to the WKK20S grade is optimised for wear resistance against abrasive cast iron surfaces. The coated cemented carbide substrate resists flank and crater wear while maintaining edge integrity under elevated temperatures. For operations where short, brittle chips and high abrasion are common, this grade extends tool life and reduces unplanned downtime, improving overall machining economy.

Chip control and surface quality under real conditions

The MK5 chipbreaker is shaped to manage the typically short, breaking chips of cast iron, ensuring controlled evacuation and minimised recutting. Controlled chip formation reduces surface damage and promotes a more repeatable finish on the component. Together with the insert’s tolerance class M and stable edge preparation, the geometry and chip control contribute to reliable part quality and reduced secondary operations.

Application focus and practical advantages

Specifically matched to cast iron (ISO group K), this insert supports a broad range of turning tasks from roughing to finishing when parameters are set according to material and machine capability. The robust design allows for higher depths of cut and keeps mechanical stress on the cutting edge low, which helps to maintain productivity in mixed batch or single‑piece production environments. Tooling planners benefit from predictable tool life and lower stocking complexity.

Contact Metav Werkzeuge for tailored cutting parameters, sample testing and fast delivery of Walter Tools inserts — telephone +49 2822 7131930 or eMail info@metav-werkzeuge.com

Technical data

• Article number: CNMG160616‑MK5‑WKK20S‑WALTER
• Designation: CNMG160616‑MK5 WKK20S
• Series: Tiger‑tec Silver
• Grade: WKK20S
• Manufacturer: Walter Tools

Facts

• Shape: Rhombic 80°
• Size: 16 mm
• Thickness: 6 mm
• Corner radius: 1.6 mm
• Free rake: 0° (negative)
• Chipbreaker: MK5
• Tolerance class: M

Special features

• Coating: Tiger‑tec Silver
• Substrate: coated cemented carbide
• Material application: cast iron (ISO group K)
• Series suitability: productive turning, stable chip formation

FAQ

Which materials is this insert intended for?
The CNMG160616‑MK5 WKK20S is designed primarily for machining cast iron (ISO group K) and is optimised for abrasive, short‑chip conditions.

How does the Tiger‑tec Silver coating benefit production?
The Tiger‑tec Silver coating improves wear resistance and thermal stability, resulting in longer tool life and more consistent surface finish in cast iron turning.

What advantages does the MK5 chipbreaker offer?
The MK5 chipbreaker ensures controlled chip formation for short, brittle chips typical of cast iron, promoting safe evacuation and minimising recutting.

Is this insert suitable for interrupted cuts?
Yes; the rhombic 80° geometry and negative rake provide a robust cutting edge that tolerates interrupted cuts and shock loads.

Can the insert be used on automatic lathes and CNC turning centres?
The insert’s format and tolerance class make it suitable for both CNC turning centres and automatic lathes when clamped in compatible toolholders.

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

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