SPMT09T308-MK4 WKK20S MK4 Wendeplatten - Walter Tools

Reliable machining performance for cast-iron applications is achieved by combining the Tiger·tec Silver coating with the MK4 chipbreaker and the square 90° form; the 0.8 mm corner radius and 11° relief angle contribute to stable cutting and extended edge life. Order the insert directly via Metav Werkzeuge or consult the specialists for cutting‑data recommendations.

SPMT09T308-MK4 WKK20S — square 90° indexable turning insert, Tiger·tec Silver (Walter Tools)

The SPMT09T308-MK4 WKK20S is a square 90° indexable turning insert optimised for machining cast iron, featuring a MK4 chipbreaker for controlled chip formation.

• Tiger·tec Silver coating for wear resistance
• Optimised for cast-iron machining (ISO 513 group K)
• MK4 chipbreaker for reliable chip control
• 0.8 mm corner radius for stable cutting edges

Longer tool life under abrasive cast-iron conditions

The combination of the Tiger·tec Silver coating and a coated carbide substrate yields significantly improved resistance to abrasive wear typical of cast materials. This engineered coating reduces flank wear and preserves cutting geometry, which translates into fewer tool changes and more consistent production output. The insert’s design addresses the short, breaking chips common with cast iron, supporting predictable life cycles and reliable cycle times.

Consistent chip control for stable serial production

Equipped with the MK4 chipbreaker, the insert produces compact, manageable chips and reduces the risk of chip interference in the machining zone. Stable chip formation lowers secondary operations such as chip clearing and improves operator safety. The controlled chip flow also helps maintain surface integrity on each workpiece, resulting in consistent part quality across series production runs and reduced rework.

Robust geometry for secure cutting performance

The square 90° form with a 0.8 mm corner radius and 11° relief angle provides a strong cutting edge capable of absorbing moderate cutting forces while maintaining dimensional stability. The T3 plate thickness and tolerance class M contribute to repeatable seating in standard tool holders, ensuring that edge engagement remains consistent from one index to the next. The robust geometry supports both facing and light to medium turning operations with dependable edge security.

Application fit and productivity gains in cast-iron turning

Designed specifically for group K materials under ISO 513, the grade WKK20S offers a balanced performance for abrasive cast-iron workpieces and short, breaking chips. The insert’s features deliver measurable productivity improvements through longer tool life, reduced downtime for insert changes and enhanced process reliability. Compatibility with common tool holders and straightforward indexing makes it a practical choice for manufacturing environments seeking steady, repeatable results.

Contact Metav Werkzeuge for tailored cutting data and stock availability of the SPMT09T308-MK4 WKK20S — phone +49 2822 7131930 or e‑mail info@metav-werkzeuge.com

Technical Data

• SKU: SPMT09T308-MK4-WKK20S-WALTER
• Product: SPMT09T308-MK4 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver

Facts

• Free angle: 11°
• Corner radius: 0.8 mm
• Plate size: 09
• Thickness: T3
• Form: Square 90°

Special features

• Grade: WKK20S (coated carbide)
• Chipbreaker: MK4
• Suitable for: Cast iron (ISO 513 — group K)
• Tolerance class: M
• Application focus: abrasive wear, short breaking chips

FAQ

Which materials is this insert intended for?
The SPMT09T308-MK4 WKK20S is intended primarily for cast iron (ISO 513 group K); the WKK20S grade and Tiger·tec Silver coating are tuned to resist abrasive wear typical of cast materials.

What chip control behaviour can be expected with the MK4 chipbreaker?
The MK4 chipbreaker generates compact, short chips ideal for interrupted and continuous cuts in cast iron, improving chip evacuation and reducing the chance of entanglement.

What are the key geometry specifications for cutting planning?
Key data: square 90° form, 0.8 mm corner radius, 11° relief angle and plate thickness T3—these parameters support robust cutting and predictable edge life.

Is the insert suitable for heavy roughing on cast iron?
The geometry and grade are optimised for abrasive conditions and stable cutting; for very heavy roughing, verify specific cutting parameters and clamping stiffness with the chosen toolholder.

How is the insert identified for ordering or tool management?
The full identification is SPMT09T308-MK4 WKK20S (Walter Tools); the SKU is SPMT09T308-MK4-WKK20S-WALTER for inventory and ordering.

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

Trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for explanatory purposes only. There is no affiliation between our company and the mentioned brands. The offered item is original, brand‑new merchandise from the manufacturer (Walter Tools).