TCMT090208-MK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of proven chip control and a robust cutting edge for consistent, high‑throughput machining of cast iron; the combination of the WKK20S grade and the Tiger‑tec Silver technology delivers long tool life and reproducible results. Order directly via Metav Werkzeuge or contact the consultants for application advice.

TCMT090208-MK4 WKK20S triangular 60° indexable insert — Tiger‑tec Silver, Walter Tools

The TCMT090208-MK4 WKK20S is a triangular 60° indexable insert designed for productive turning and boring of cast iron components with optimised chip formation and durable coated carbide performance

• Tiger‑tec Silver coating technology
• Grade WKK20S optimised for cast iron
• Triangular 60° form with 0.8 mm corner
• 7° relief angle for steady cutting

High-efficiency machining of cast iron with stable chip control

The combination of the WKK20S carbide grade and the Tiger‑tec Silver coating is engineered for cast iron applications, matching the abrasive wear behaviour and the typically short, brittle chips of these materials. This results in stable chip formation and reduced risk of edge chipping, so cycle times are more predictable and rework rates fall. The insert's MK4 chipbreaker geometry assists in breaking and evacuating chips reliably, which benefits both automated and manual machining operations where uninterrupted production is essential. For shops seeking a reproducible machining process, this specification supports consistent part quality.

Coating and substrate that extend tool life and process security

The coated carbide system provides an improved thermal barrier and enhanced wear resistance compared with uncoated grades; Tiger‑tec Silver reduces adhesive and abrasive wear mechanisms during interrupted turning and heavy cut entries. This wear resistance preserves a stable cutting edge for longer periods, lowering the frequency of index changes and increasing productivity. The coating technology also contributes to surface finish stability across batches, which aids in achieving repeatable tolerances in serial production. Technical users benefit from a tool that supports higher metal removal rates while maintaining tool life.

Geometry designed for versatility and robust edge strength

A triangular 60° plate with a 0.8 mm corner radius offers a balance between strength and form accuracy: the larger corner radius gives improved edge support for heavy depths of cut, while the 60° basic shape permits multiple indexing positions for economical use. The 7° relief angle helps to reduce rubbing on the flank face and lowers cutting forces in demanding cuts. These geometric choices mean fewer tool changes and predictable wear patterns, which support lean manufacturing workflows and easier process planning.

Practical integration and application guidance

The insert is suited to ISO group K (cast iron) machining according to the material group designation and is particularly effective where short, breaking chips and abrasive wear are common. Its design permits simple mounting in compatible toolholders and fast index changes to maintain uptime. For implementation, recommend verifying holder compatibility with the TCMT090208‑MK4 form and selecting cutting parameters aligned with cast iron machining tables; the combination of geometry and grade typically supports robust performance in both roughing and medium finishing operations. For specific parameter recommendations or to confirm suitability for a particular machine setup, technical consultation is available.

Contact Metav Werkzeuge for tailored application advice on Walter Tools Tiger‑tec Silver inserts or to discuss suitable toolholder combinations; Metav Werkzeuge is available by e‑mail at info@metav-werkzeuge.com or by phone at +49 2822 7131930

Technical Data

• Article number: TCMT090208-MK4-WKK20S-WALTER
• Designation: TCMT090208-MK4 WKK20S

Facts

• Relief angle: 7°
• Corner radius: 0.8 mm
• Plate form: Triangle 60°
• Plate size: 09
• Thickness: 02
• Tolerance class: M

Special features

• Series: Tiger‑tec Silver
• Grade: WKK20S
• Chipbreaker: MK4
• Material group suitability: cast iron (ISO K)
• Execution: T
• Manufacturer: Walter Tools

FAQ

What materials is this insert intended for?
The insert is specified for cast iron machining; the WKK20S grade and Tiger‑tec Silver coating are optimised for abrasive wear and short, breaking chips typical of cast iron.

How does the MK4 chipbreaker affect performance?
The MK4 chipbreaker promotes controlled chip formation and reliable evacuation, reducing the risk of entanglement and improving surface consistency when turning cast iron.

What are the key geometric advantages of this triangular insert?
The triangular 60° form provides three usable cutting edges, while the 0.8 mm corner radius and 7° relief angle combine to deliver robust edge support and lowered flank rubbing in medium to heavy cuts.

Is this insert compatible with standard TCMT toolholders?
The designation TCMT090208‑MK4 corresponds to standard TCMT toolholder interfaces; compatibility should be confirmed against the specific holder catalogue and clamping specification.

How does the Tiger‑tec Silver technology influence tool life?
The Tiger‑tec Silver coating reduces adhesive and abrasive wear, enhancing thermal resistance and generally extending the usable life of the cutting edge under cast iron machining conditions.

Manufacturer/Responsible: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen, Germany; www.walter-tools.com

Protected trademarks and trade names are the property of their respective owners. Brand names are used for identification and explanation only. The mentioned Walter Tools product is an original, factory‑new article from the manufacturer.