DCMT070204-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of high process reliability and targeted wear resistance for efficient cast-iron turning; the insert’s Tiger·tec Silver grade and RK4 chipbreaker ensure stable chip formation and predictable tool life — order or request advice via Metav Werkzeuge.

DCMT070204-RK4 WKK20S indexable turning insert for cast iron, Tiger·tec Silver — Walter Tools

The DCMT070204-RK4 WKK20S is an indexable turning insert engineered for abrasive cast-iron machining, providing a balance of wear resistance and consistent chip control in production environments.

• Tiger·tec Silver coating for wear resistance
• RK4 chipbreaker for controlled chip formation
• Rhombic 55° shape with 0.4 mm corner radius
• Optimised for cast iron machining

Durable coating and material selection for longer tool life

The DCMT070204-RK4 WKK20S insert uses a coated carbide grade from the Tiger·tec Silver family, designed to withstand the abrasive nature of cast-iron workpieces. The coating technology reduces flank and crater wear, which translates into longer effective cutting periods and fewer indexings. For production lines processing grey or nodular cast iron, this means more consistent part quality and lower tool-change frequency, supporting predictable cycle times and less downtime.

Geometry that delivers predictable chips and surface quality

A rhombic 55° insert geometry combined with the RK4 chipbreaker produces short, controlled chips suitable for interrupted and continuous cuts in cast iron. The 0.4 mm corner radius helps maintain edge strength while enabling fine surface finishes in finishing passes. The 7° clearance angle reduces rubbing at the flank, lowering heat generation and helping to preserve the cutting edge. In practical terms, this geometry reduces the risk of built-up edge and simplifies chip evacuation in established turning setups.

Process security and application-oriented performance

The WKK20S grade offers a balance between wear resistance and toughness, tailored for abrasive cast-iron conditions. The tolerance class M ensures reproducible insert fitment and stable seating in toolholders, which contributes to repeatable machining accuracy. Using a coated carbide insert optimised for cast iron supports higher material removal rates with reliable edge behaviour, improving overall shop-floor productivity while maintaining component tolerances.

Contact Metav Werkzeuge for technical advice or to arrange supply of Walter Tools DCMT070204-RK4 WKK20S turning inserts via info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• SKU: DCMT070204-RK4-WKK20S-WALTER
• Designation: DCMT070204-RK4 WKK20S
• Product type: Indexable turning insert

Facts

• Clearance angle: 7°
• Corner radius: 0.4 mm
• Shape: Rhombus 55°
• Insert size: 07
• Thickness code: 02
• Tolerance class: M

Special features

• Series: Tiger·tec Silver
• Grade: WKK20S
• Chipbreaker: RK4
• Coated carbide
• Application: cast iron
• Indexable insert without seat/hardware
• Manufacturer: Walter Tools

FAQ

Which materials is this insert suited for?
The insert is optimised for cast iron applications; the WKK20S grade and Tiger·tec Silver series are tuned for abrasive, break-prone chips typical of cast materials.

How does the RK4 chipbreaker affect machining?
The RK4 chipbreaker promotes short, controlled chips and steady chip evacuation, improving process reliability when turning cast-iron components with interrupted or continuous cuts.

What geometry and dimensions are relevant for setup?
The rhombic 55° geometry, 0.4 mm corner radius and 7° clearance angle define cutting behaviour and seating; these values support fine surface finishes and robust edge strength for finishing and semi-finishing operations.

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

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