SCMT120412-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Combining the Tiger·tec Silver coating with a robust RK4 chipbreaker and a 1.2 mm corner radius yields dependable chip control and extended tool life for cast-iron turning — order the SCMT120412-RK4 WKK20S directly via Metav Werkzeuge or consult the team for tailored recommendations.

SCMT120412-RK4 WKK20S — Indexable Turning Insert (Square 90°, Tiger·tec Silver) by Walter Tools

The SCMT120412-RK4 WKK20S is a square indexable turning insert designed for efficient machining of cast iron components in production and job‑shop environments.

• Tiger·tec Silver coating for heavy-duty use
• Optimised for cast iron (K)
• RK4 chipbreaker for stable chip control
• Square 90° insert with 1.2 mm corner radius

High metal‑removal reliability for cast iron turning

The combination of the Tiger·tec Silver coating and the WKK20S grade creates a coated carbide cutting edge tailored to the abrasiveness and short, broken chips typical of cast iron. Coatings of this type reduce flank wear and thermal degradation, which translates into longer tool life and fewer insert changes on the shop floor. The result is a measurable improvement in process stability and less unplanned downtime, supporting continuous production and predictable batch output.

Consistent chip formation and surface quality

The dedicated RK4 chipbreaker together with a 1.2 mm corner radius and 7° clearance produces compact, predictable chips while preserving edge strength. A square, 90° profile gives geometric stability for moderate to heavy cuts and simplifies toolholder selection. These geometric choices balance cutting forces and surface finish: the corner radius supports a robust cutting edge for longer life, while the chipformer reduces built-up edge and improves swarf evacuation during interrupted cuts.

Production advantages and tool management benefits

Adopting this insert in a turning cell brings practical gains: fewer indexings because of improved wear resistance, simpler inventory management through a widely used ISO designation, and consistent part quality across shifts. The insert’s form factor and coating make it suitable for repeatable results in serial production or small-batch manufacturing where cast iron components demand both economy and reliability. Technical teams benefit from predictable tool life and clearer reconditioning intervals, aiding cost control and throughput.

For application advice or to source Walter Tools inserts like the SCMT120412-RK4 WKK20S, contact Metav Werkzeuge for expert guidance and rapid supply: info@metav-werkzeuge.com • +49 2822 7131930

Technical Data

• SKU: SCMT120412-RK4-WKK20S-WALTER
• Designation: SCMT120412-RK4 WKK20S
• Product type: Indexable turning insert / cutting insert
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver
• Grade: WKK20S

Facts

• Clearance angle: 7°
• Corner radius: 1.2 mm
• Insert size: 12 mm
• Plate form: Square 90°
• Thickness code: 04
• Tolerance class: M

Special features

• Coating: Tiger·tec Silver
• Schneidstoffklasse: coated carbide
• Chipbreaker: RK4
• Application: cast iron (K)
• Sort: WKK20S
• Stable chip control and enhanced wear resistance

FAQ

What materials is this insert intended for?
The SCMT120412-RK4 WKK20S is optimised for machining cast iron (designated K) and its abrasive, short‑chip behaviour.

What does the WKK20S grade offer?
WKK20S, in the Tiger·tec Silver family, provides a coated‑carbide balance between wear resistance and toughness for reliable performance on cast iron.

How does the RK4 chipbreaker affect machining?
The RK4 chipbreaker produces compact chips and improves evacuation, reducing the risk of entanglement and supporting stable cutting under interrupted conditions.

Will the 1.2 mm corner radius affect surface finish?
A 1.2 mm radius increases edge strength and tool life; it typically delivers a robust finish suitable for many turning operations while tolerating higher cutting forces.

Is this insert compatible with standard toolholders?
The insert uses a common ISO form (SCMT120412‑RK4) and will fit toolholders designed for square 90° inserts with the matching clamping system.

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

Protected trademarks and product names are the property of their respective owners. Brand names and registered trademarks are mentioned solely for explanatory purposes. There is no affiliation between our company and the mentioned brands. The offered article is an original factory‑new product of the manufacturer.