DNMA150412-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Reliable chip control and the Tiger·tec Silver wear resistance combine to deliver consistent productivity when machining cast iron; the RK5 chipbreaker and a 1.2 mm corner radius ensure robust edge life and predictable chip formation. Order the DNMA150412-RK5 WKK20S insert directly via Metav Werkzeuge or consult our application specialists for tailored recommendations.

DNMA150412-RK5 WKK20S indexable turning insert for cast iron — RK5 chipbreaker, Tiger·tec Silver (Walter Tools)

The DNMA150412-RK5 WKK20S is a rhombic 55° negative insert engineered for productive turning of cast iron, combining a coated carbide grade with a chipbreaker tuned to short, controlled chips.

• Tiger·tec Silver coated for high wear resistance
• RK5 chipbreaker for short, controlled chips
• Rhombic 55° geometry with 1.2 mm corner radius
• 0° negative relief for robust, stable cutting

Durable coating and grade for abrasive cast-iron work

The combination of the Tiger·tec Silver coating and the WKK20S grade provides enhanced resistance to abrasive wear common in cast‑iron machining. The grade is a coated carbide type optimised for ISO group K materials, where frequent short, brittle chips and abrasive constituents can accelerate tool wear. This technical pairing extends productive cutting life, reduces the need for unscheduled index changes and supports more predictable process economics — a rational advantage for batch production and repetitive turning operations.

Geometry that controls chips and protects the edge

The insert’s RK5 chipbreaker is designed to generate short, easy‑to‑evacuate chips, improving surface integrity and reducing interruption from long swarf. Combined with the rhombic 55° shape and a 1.2 mm corner radius, the geometry balances edge strength with cutting precision. The 0° negative relief provides a robust cutting edge for stable cuts under varying depths of cut and feed, while the tolerance class M ensures repeatable seating and interchangeability in standard clamping systems. These features translate into fewer tool interventions and a steadier production flow.

Practical application and workshop benefits

Specified with a nominal size of 15 mm and a plate thickness of 4 mm, this insert suits a wide range of turning tasks on cast iron where a reliable, universal grade is required. The insert’s characteristics support both routine finishing and general‑purpose turning across many foundry grades. For process setup, the grade’s behaviour enables conservative starting parameters and subsequent optimisation for cycle time and surface finish. For additional cutting data or application-specific parameters, Metav Werkzeuge’s technical team can provide tailored guidance to integrate the insert into existing tool chains.

For application advice, cutting‑data optimisation or a quotation for Walter Tools DNMA150412-RK5 WKK20S inserts, contact Metav Werkzeuge at info@metav-werkzeuge.com or +49 2822 7131930 — the specialists will advise on the optimal grade and parameters for the intended cast‑iron application

Technical Data

• Article number: DNMA150412-RK5-WKK20S-WALTER
• SKU: DNMA150412-RK5-WKK20S-WALTER
• Designation: DNMA150412-RK5 WKK20S

Facts

• Size: 15 mm
• Thickness: 4 mm
• Corner radius: 1.2 mm
• Relief angle: 0° (negative)
• Shape: Rhombus 55°
• Tolerance class: M
• Chipbreaker: RK5

Special features

• Coating: Tiger·tec Silver
• Grade: WKK20S (coated carbide)
• Series: Tiger·tec Silver
• Suitable for: Cast iron (ISO group K)
• Execution: A

FAQ

Which materials is this insert suitable for? The DNMA150412-RK5 WKK20S insert is formulated for machining cast iron, aligned with ISO group K; the WKK20S grade and Tiger·tec Silver coating address abrasive wear and short‑chip conditions typical of these materials.

How does the RK5 chipbreaker affect chip formation? The RK5 chipbreaker on this Walter Tools insert produces short, controlled chips that are easier to evacuate from the cutting zone, supporting safer operation and more consistent surface quality.

What are the key geometric specifications to consider? The product features a rhombic 55° shape, a 1.2 mm corner radius and a 0° negative relief; the standard size is 15 mm with 4 mm thickness, all of which influence edge strength, insert positioning and achievable feeds.

What does the WKK20S grade offer in production? WKK20S is a coated carbide grade within the Tiger·tec Silver family, optimised for wear resistance in cast‑iron turning; it supports reliable performance and predictable tool life under abrasive conditions.

What does tolerance class M mean for tool mounting? Tolerance class M indicates standardised dimensional accuracy for the insert, ensuring consistent seating and interchangeability in compatible indexable insert holders.

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