CCMT09T308-MK4 WKK20S WKK20S Wendeplatten - Walter Tools

The combination of Tiger‑tec Silver coating, the MK4 chipbreaker and the robust CCMT geometry delivers reliable, productive machining of cast iron components. Order the insert directly via Metav Werkzeuge or request technical consultancy if application advice is required.

CCMT09T308-MK4 WKK20S drilling and turning indexable insert for cast iron, Tiger‑tec Silver, MK4 (Walter Tools)

CCMT09T308-MK4 WKK20S is a versatile indexable insert designed for combined drilling/boring and turning operations in cast-iron applications

• Tiger‑tec Silver coating for enhanced wear resistance
• Optimised MK4 chipbreaker for controlled chip formation
• Rhombic 80° geometry for stable cutting performance
• 0.8 mm corner radius for durable cutting edge

Durable coating for abrasive cast-iron machining

The Walter grade WKK20S, produced within the Tiger‑tec Silver family, is a coated cemented carbide design optimised for abrasive cast-iron work. This grade balances hardness and toughness to resist the typical abrasive wear and the frequent short, breaking chips associated with cast materials. The result is extended tool life and predictable tool change intervals, which supports continuous production and reduces unplanned downtime.

Geometry engineered for stability and repeatability

A rhombic 80° cutting geometry combined with a 0.8 mm corner radius, 7° relief angle and T3 thickness gives the insert mechanical stability at the cutting edge and repeatable seating in the toolholder. The robust geometry reduces vibration in interrupted cuts and improves resistance to chipping, while the M tolerance class ensures consistent fit and reliable clamping across toolholders. These attributes support consistent surface quality and dimensional control in series production.

Chip control that maintains throughput

The integrated MK4 chipbreaker is designed to produce short, controllable chips when machining cast iron, reducing the risk of entanglement and ensuring uninterrupted operation. Controlled chip formation shortens cycle interruptions for chip evacuation and improves process reliability. Where intermittent cuts or varying depths are encountered, the chipbreaker helps maintain stable cutting forces and contributes to overall process security on the machine.

Practical use and application advantages

The insert is suitable for combined drilling and turning routines where flexibility and predictable performance are required. As a coated cemented carbide grade optimised for cast iron, it supports increased productivity through longer edge life and predictable wear behaviour. The insert designation and geometry allow easy integration into standard CCMT toolholders; cutting data should be selected in line with machine rigidity and component tolerances to exploit the full potential of the grade and chip control features.

For application recommendations or to secure supply of Walter Tools CCMT09T308-MK4 WKK20S inserts, contact Metav Werkzeuge for direct ordering or specialist advice at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: CCMT09T308-MK4-WKK20S-WALTER
• Article designation: CCMT09T308-MK4 WKK20S
• Manufacturer: Walter Tools
• Product type: Drilling/boring and turning indexable insert
• SKU: CCMT09T308-MK4-WKK20S-WALTER

Facts

• Relief angle: 7°
• Corner radius: 0.8 mm
• Plate form: Rhombus 80°
• Plate size: 09
• Plate thickness: T3
• Tolerance class: M

Special features

• Series: Tiger‑tec Silver
• Grade: WKK20S
• Coating: coated cemented carbide
• Chipbreaker: MK4
• Application: drilling and turning
• Suitable for: cast iron

FAQ

What materials is this insert intended for?
The CCMT09T308-MK4 WKK20S insert is developed primarily for machining cast iron, using the WKK20S grade within the Tiger‑tec Silver family.

How does the MK4 chipbreaker help in production?
The MK4 chipbreaker produces short, controllable chips when cutting cast iron, reducing chip-related interruptions and supporting continuous throughput with improved process stability.

Which features contribute most to edge life?
The combination of Tiger‑tec Silver coating, the robust 0.8 mm corner radius and the insert’s Rhombic 80° geometry delivers enhanced wear resistance and reliable edge strength, prolonging service life.

Is the insert suitable for both turning and drilling operations?
Yes, the insert’s designation and geometry support combined drilling and turning routines; appropriate toolholder selection and cutting data are recommended for optimal results.

What tolerance and fit can be expected for the insert?
The insert is manufactured to an M tolerance class, ensuring consistent seating and repeatable clamping accuracy in compatible toolholders.

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

The Walter AG (brand appearance: Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Swedish Sandvik Group. Protected trademarks and trade names are the property of their respective owners. Brand names and protected trademarks are mentioned solely for explanation. There is no relationship between our company and the named brands. The offered article is an original, factory-new product of the manufacturer.