TCMT090204-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Achieve consistent material removal and long service life by combining the Tiger·tec Silver coated grade with an RK4 chipbreaker for reliable chip control in cast iron turning. Benefit from the triangular geometry and precise clearance to maintain surface quality and process stability — order the TCMT090204-RK4 WKK20S via Metav Werkzeuge or consult their technical advisors for application support.

TCMT090204-RK4 WKK20S — Turning indexable insert from Walter Tools for cast iron

A triangular turning indexable insert, the TCMT090204-RK4 WKK20S is engineered for robust and repeatable machining of cast iron components in general turning applications

• Tiger·tec Silver coating for high wear resistance
• RK4 chipbreaker optimised for cast iron machining
• Triangle 60° geometry for flexible turning operations
• 7° clearance angle with 0.4 mm corner radius

Higher output with predictable tool life

The combination of a coated carbide grade and the proprietary Tiger·tec Silver technology provides a balance between abrasive-wear resistance and edge toughness tailored for cast iron (ISO K). This grade, designated WKK20S, addresses the frequently short, brittle chips produced when machining cast materials; the result is stable chip formation and reduced edge chipping. The RK4 chipbreaker has been shaped and tested for reliable evacuation of fragmented chips typical of grey and ductile cast irons, which in practice lowers downtime caused by clogged flutes or interrupted feeds. The technical configuration therefore leads directly to more consistent cycle times and fewer interruptions on production lines.

Geometry designed for consistent surface quality and edge strength

A triangular 60° insert provides three usable cutting edges per indexable piece, increasing economy and reducing change intervals. The geometry of this insert, including the 0.4 mm corner radius, has been chosen to deliver a compromise between edge strength and achievable surface finish: the small radius resists mechanical shock while still allowing fine finishes on turned bores and faces. The 7° clearance angle limits flank rubbing, so heat build-up is reduced and flank wear is delayed. Together these features support repeatable dimensional results and help maintain machining tolerances in medium-duty and finishing operations.

Practical integration and production advantages

Built to tolerance class M and supplied as part of the Tiger·tec Silver series, the insert is compatible with standard triangular toolholders used in most turning centres. Its specification simplifies stock management: one grade for a wide range of cast-iron tasks. Using a wear-resistant coated grade such as WKK20S typically reduces the frequency of tool changes and rework, improving throughput and lowering per-part tooling costs. For workshops seeking process reliability, the insert contributes to a measurable uplift in productivity while supporting predictable tool-change planning. If additional machining scenarios require clarification, Metav Werkzeuge’s advisors can assist with toolholder pairing and cutting-parameter recommendations.

For tailored application advice on Walter Tools’ TCMT090204-RK4 WKK20S or to discuss batch supply and toolholder compatibility, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 — the technical team will advise on the optimal setup for cast iron turning.

Technical data

• Article number / SKU: TCMT090204-RK4-WKK20S-WALTER
• Label: Bohr-/Aufbohrwendeschneidplatte / Drehwendeschneidplatte TCMT090204-RK4 WKK20S Walter Tools
• Series: Tiger-tec Silver

Core specifications

• Insert form: Triangle 60°
• Clearance angle: 7°
• Corner radius: 0.4 mm
• Size code: 09
• Thickness code: 02
• Chipbreaker: RK4
• Grade: WKK20S

Materials & special features

• Coating: Tiger·tec Silver (coated carbide)
• Suitable for: Cast iron (ISO K)
• Tolerance class: M
• Execution: T
• Manufacturer: Walter Tools

FAQ

What materials is this insert intended for?
The TCMT090204-RK4 WKK20S from Walter Tools is formulated for machining cast iron (ISO K), with the grade and chipbreaker tuned to handle the abrasive wear and short, breaking chips typical of these materials.

How does the RK4 chipbreaker help in production?
The RK4 chipbreaker is optimised for controlled chip formation and evacuation in cast-iron turning, reducing the risk of chip entanglement and promoting continuous operation with fewer interruptions.

Can this insert deliver a good surface finish?
Yes — the 0.4 mm corner radius and the 7° clearance angle help balance edge strength and finish quality, enabling consistent surface results in medium-duty finishing passes.

Is the TCMT090204-RK4 compatible with standard toolholders?
The insert’s triangular 60° form is compatible with common triangular toolholders for turning centres; for exact holder matching, the Walter Tools insert designation TCMT090204-RK4 WKK20S should be referenced.

What is the advantage of the Tiger·tec Silver series for this application?
The Tiger·tec Silver coating enhances abrasion resistance while preserving edge toughness, which is particularly beneficial when machining abrasive cast-iron grades, contributing to longer tool life and process stability.

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

Protected trademarks and trade names are the property of their respective owners. Mark names and registered trademarks are cited for explanatory purposes only and do not indicate any affiliation between our company and the named brands. The item offered is an original, factory-new product of the manufacturer (Walter Tools).