TPGT090204-MK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger‑tec Silver coating, a dedicated WKK20S grade and the MK4 chipbreaker for reliable, productive cast iron turning; order or request application support via Metav Werkzeuge for a smooth integration into existing machining processes.

TPGT090204-MK4 WKK20S turning indexable insert — Tiger‑tec Silver for cast iron (Walter Tools)

A TPGT090204-MK4 WKK20S turning indexable insert optimised for productive and consistent machining of cast iron components in industrial turning applications.

• Tiger‑tec Silver coating for long tool life
• Optimised for cast iron machining
• MK4 chipbreaker for secure chip control
• Triangle 60° format with 0.4 mm radius

Consistent, economical performance for cast iron turning

The insert combines the WKK20S carbide grade with the Tiger‑tec Silver coating to deliver wear resistance tailored to abrasive cast iron conditions. The result is a stable cutting edge that extends tool life and reduces process interruptions, supporting higher cumulative cutting volumes and lower tool-change frequency. The triangular 60° format with a 0.4 mm corner radius provides a predictable cutting geometry that helps maintain dimensional stability on short to medium turning passes. These aspects make the insert particularly suitable for shops seeking cost-effective productivity improvements when machining grey and nodular cast iron.

Secure chip control and reliable surface results

Equipped with the MK4 chipbreaker and an 11° clearance angle, this insert promotes controlled chip formation and evacuation under typical cast iron cutting regimes. Controlled chips reduce re-cutting, protect the workpiece surface and help maintain coolant flow, which together contribute to improved surface integrity and repeatability. The insert’s geometry balances edge strength and sharpness, so finish and process security are enhanced without sacrificing productivity. For operations where consistent surface quality and reduced cycle variability matter, this insert supports more reliable downstream processing.

Practical application guidance and process integration

The insert is supplied in the common TPGT090204-MK4 format and integrates into standard triangular toolholder systems for turning. Its WKK20S composition is specifically matched to cast iron (ISO material group K), addressing the abrasiveness and short, brittle chips typical of these alloys. When replacing inserts, match the seat geometry and secure the clamping torque recommended by the toolholder manufacturer to preserve repeatable positioning. For high-volume or automated turning centres, the stable wear behaviour of the Tiger‑tec Silver coating reduces inspection intervals and contributes to predictable tooling costs over time.

Contact Metav Werkzeuge today for tailored cutting data and to discuss how the Walter Tools Tiger‑tec Silver inserts can improve cast iron turning in production environments — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: TPGT090204-MK4-WKK20S-WALTER
• SKU: TPGT090204-MK4-WKK20S-WALTER
• Designation: TPGT090204-MK4 WKK20S
• Product type: Turning indexable insert
• Brand: Walter Tools

Facts

• Relief/clearance angle: 11°
• Corner radius: 0.4 mm
• Insert shape: Triangle 60°
• Insert size: 09
• Chipbreaker: MK4
• Grade/insert family: WKK20S, Tiger‑tec Silver
• Thickness code: 02
• Tolerance class: G
• Execution code: T

Special features

• Coating technology: Tiger‑tec Silver
• Carbide type: Coated cemented carbide (WKK20S)
• Application focus: Cast iron machining (ISO group K)
• Advantages: Optimised chip control, stable edge, wear resistance

FAQ

What materials is this insert intended for?
The TPGT090204-MK4 WKK20S insert from Walter Tools is designed primarily for cast iron applications (ISO material group K), with the WKK20S grade tuned to the abrasive nature of these alloys.

Which chipbreaker does the insert use and what benefit does it bring?
This insert features the MK4 chipbreaker, which provides secure chip control and improved evacuation during turning, reducing recuts and supporting consistent surface quality.

What are the key geometry specs to consider when setting up the toolholder?
Key specifications include the 11° clearance angle, triangle 60° insert shape and a 0.4 mm corner radius; these determine seating, cutting line and expected finish when matched with the correct holder.

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

The Walter AG (marketed as Walter Tools) with its headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Sandvik Group. Protected trademarks and trade names are the property of their respective owners. Brand names and protected trademarks are mentioned for clarification purposes only; there is no affiliation between our company and the mentioned brands. The offered item is an original, brand‑new product from the manufacturer.