SCMT09T308-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating, a tailored WKK20S grade and the RK4 chipbreaker for consistent chip control and economical machining of cast iron; order the insert directly via Metav Werkzeuge or contact our consultants for application advice.

SCMT09T308-RK4 WKK20S indexable insert for boring and turning – Walter Tools, Tiger·tec Silver, optimised for cast iron

A SCMT09T308-RK4 WKK20S indexable turning and boring insert designed for reliable machining of cast iron components in industrial production environments

• Tiger·tec Silver coated carbide
• Optimised for cast iron machining
• RK4 chipbreaker for controlled chips
• Square 90° geometry with 0.8 mm radius

High-performance cutting for abrasive cast iron work

The combination of the Tiger·tec Silver coating and the WKK20S grade delivers a balance between wear resistance and toughness specifically for cast iron. The coated carbide construction reduces abrasive wear from graphite and hard inclusions, while the grade’s design copes with the typically short, breaking chips of many cast irons. The RK4 chipbreaker ensures predictable chip formation and evacuation during both boring and turning operations, reducing the risk of built-up edge and interrupted cutting. This results in more stable machining cycles and fewer unplanned interruptions.

Consistent productivity and predictable tool life

A moderate clearance angle (7°) and the 0.8 mm corner radius provide a robust cutting edge that tolerates machining variations without sacrificing surface quality. The square 90° geometry offers versatility for shoulder cuts and general turning tasks, while the plate size 09 and thickness T3 suit common toolholder systems. These technical choices emphasise process reliability and repeatability: reduced downtime, stable cutting forces and easier planning of tool-change intervals contribute directly to improved output per shift.

Practical integration and application guidance for workshop use

For practical setup, select a compatible indexable toolholder rated for square inserts and confirm insert clamping torque per holder manufacturer guidelines. The insert is primarily intended for cast iron (material group K) and performs well on abrasive and brittle grey and nodular irons. The RK4 chipbreaker simplifies chip control at typical cutting parameters for roughing and finishing passes; for users less familiar with chipbreaker function, it channels and breaks chips to prevent entanglement and permit higher feed rates while maintaining surface integrity. For adaptations to specific workpieces, consult the technical data sheet or our application engineers.

Contact Metav Werkzeuge today for tailored advice on integrating Walter Tools Tiger·tec Silver WKK20S inserts into production — eMail info@metav-werkzeuge.com or call +49 2822 7131930 to discuss toolholder compatibility and order options

Technical Data

• Article number: SCMT09T308-RK4-WKK20S-WALTER
• Designation: SCMT09T308-RK4 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver
• Grade: WKK20S
• Plate form: Square 90°
• Chipbreaker: RK4

Facts

• Clearance angle: 7°
• Corner radius: 0.8 mm
• Plate size: 09
• Thickness: T3
• Tolerance class: M

Special features

• Coated carbide grade for abrasive wear resistance
• Optimised for cast iron (material group K)
• Reliable chip control with RK4 chipbreaker
• Suitable for boring and turning applications
• Square geometry for shoulder and general turning

FAQ

What materials is this insert suitable for?
The SCMT09T308-RK4 WKK20S insert by Walter Tools is optimised for cast iron (material group K) and designed to resist abrasive wear typical of many cast-iron grades.

How does the RK4 chipbreaker affect machining?
The RK4 chipbreaker on the SCMT09T308-RK4 WKK20S shapes and breaks chips to improve evacuation and reduce the risk of chip-related interruptions during boring and turning.

What does the 0.8 mm corner radius mean for surface finish?
A 0.8 mm corner radius provides a compromise between edge strength and surface quality: it improves edge robustness for interrupted cuts while still achieving good surface integrity on cast-iron components.

Which series and coating technology does the insert use?
This insert belongs to the Tiger·tec Silver series and uses the WKK20S coated carbide grade developed for process-stable machining of cast iron.

Is this insert compatible with standard square insert toolholders?
Yes, the square 90° geometry and size 09 make the insert compatible with common toolholders designed for square turning and boring inserts; verify clamping and seating dimensions against the holder specification.

Hersteller: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen, Germany

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