SCMT120408-MK4 WKK20S WKK20S Wendeplatten - Walter Tools

Optimise cast-iron machining with the Tiger‑tec Silver coating and the WKK20S grade for stable wear resistance and reliable chip control; the MK4 chipbreaker and 0.8 mm corner radius support consistent surface quality and predictable tool life. Order directly via Metav Werkzeuge or consult the technical team for application-specific advice.

SCMT120408-MK4 WKK20S – Boring and turning indexable insert, Tiger‑tec Silver for cast iron by Walter Tools

A SCMT120408-MK4 WKK20S insert engineered for precise boring and turning operations in cast iron components

• Tiger‑tec Silver coating for extended life
• Optimised for cast iron machining
• MK4 chipbreaker for controlled chips
• Square 90° geometry with 0.8 mm corner radius

Consistent performance where abrasion matters

The Tiger‑tec Silver grade delivers a balance between wear resistance and toughness that suits abrasive cast‑iron workpieces. The coated WKK20S grade is tuned for the short, brittle chips typical of grey and nodular cast irons, providing stable wear behaviour and extended tool life in serial production. As a result, downtimes due to premature edge failure are reduced and process repeatability improves, which supports predictable planning in production environments.

Predictable chip formation and surface quality

Built-in MK4 chip control and a 0.8 mm corner radius allow reliable chip breaking and evacuation during interrupted and continuous cuts. The MK4 geometry reduces the risk of chip entanglement and enhances surface finish by distributing cutting forces more evenly across the cutting edge. These characteristics make the insert especially suitable for operations that require consistent component tolerances and a reduction in secondary finishing.

Robust geometry for versatile mounting and toolpath strategies

The square 90° geometry and size 12 profile provide flexibility for both boring and turning toolholders, enabling a range of cut depths and feed settings. The insert’s design and the specified clearance angle of 7° support stable engagement in radial and axial cuts, which helps maintain toolholder stability during heavier cuts. Integration into standard indexable tool systems is straightforward, allowing quick index changes and minimal set‑up time.

Application-focused material suitability and standards

Designed primarily for ISO group K materials, this insert is recommended for machining various cast‑iron grades. The coating technology and substrate combination aim to handle abrasive wear while preserving the cutting edge in interrupted cuts. Where cast‑iron components demand consistent dimensional accuracy and repeatable surface condition, the insert provides a reliable option that matches common shop‑floor requirements and machining strategies.

Economic benefits and production reliability

By combining coating technology with a proven chipbreaker and robust edge geometry, the insert delivers advantages in tool life and process stability that translate into lower unit costs over time. The design supports predictable tool changes and easier process validation, contributing to fewer scrap parts and improved throughput. For manufacturers seeking to balance productivity and quality in cast‑iron turning and boring, this insert represents a pragmatic choice.

For tailored recommendations on integrating Walter Tools’ SCMT120408‑MK4 WKK20S inserts into production, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 to discuss cutting data and holder compatibility.

Technical data

• SKU: SCMT120408-MK4-WKK20S-WALTER
• Designation: SCMT120408-MK4 WKK20S
• Type: Boring/enlarging indexable insert / turning indexable insert
• Brand: Walter Tools
• Grade: WKK20S
• Series: Tiger‑tec Silver

Facts

• Clearance angle: 7°
• Corner radius: 0.8 mm
• Shape: Square 90°
• Size: 12
• Thickness code: 04
• Tolerance class: M

Special features

• Coating: Tiger‑tec Silver
• Chipbreaker: MK4
• Suitable for: Cast iron (ISO group K)
• Material designation: K

FAQ

What materials is this insert intended for?
This insert is designed for machining cast iron materials; the WKK20S grade and Tiger‑tec Silver coating target ISO group K applications for stable wear and chip formation.

How does the MK4 chipbreaker improve production?
The MK4 chipbreaker on the SCMT120408‑MK4 WKK20S insert promotes controlled chip breaking and evacuation, reducing chip‑related interruptions and supporting consistent surface quality.

Is this insert compatible with standard square indexable toolholders?
The square 90° form and the size 12 profile are compatible with common turning and boring toolholders that accept SCMT‑style inserts; toolholder selection should match the specified insert dimensions.

What cutting conditions typically benefit from the 0.8 mm corner radius?
A 0.8 mm corner radius balances edge strength and surface finish in medium to heavy turning passes, reducing notch sensitivity while maintaining acceptable roughness for many cast‑iron components.

Can this insert handle interrupted cuts?
Yes, the combination of substrate, coating and chipbreaker geometry is intended to perform reliably in interrupted and continuous cutting conditions commonly encountered in cast‑iron machining.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are used for explanation only and do not imply any affiliation between Metav Werkzeuge and the named manufacturers. The offered item is an original, brand‑new product from the respective manufacturer (Walter Tools).