VBMT160408-MK4 WKK20S WKK20S Wendeplatten - Walter Tools

Taking advantage of the combination of Tiger·tec Silver wear resistance, an MK4 chipbreaker tuned for cast iron and the stable rhombic 35° geometry ensures consistent machining results and fewer tool changes; order via Metav Werkzeuge or request consultancy for application advice.

VBMT160408-MK4 WKK20S indexable turning insert — Walter Tools, Tiger·tec Silver, for cast iron

The VBMT160408-MK4 WKK20S is an indexable turning insert designed for reliable machining of cast iron, combining the Tiger·tec Silver coating with an MK4 chipbreaker and a compact rhombic geometry for stable, repeatable cutting performance.

• Tiger·tec Silver coating for improved wear resistance
• Optimised MK4 chipbreaker for cast iron chips
• Rhombic 35° geometry with 5° clearance angle
• 0.8 mm nose radius for stable cutting edge

Longer tool life through targeted coating technology

The application of Tiger·tec Silver on the cutting grade provides enhanced wear resistance specifically where abrasive cast iron materials accelerate flank and crater wear. This coated carbide technology reduces flank wear and supports longer tool life during series production, which lowers tool consumption and minimises machine downtime. The result is a measurable improvement in process economy when turning abrasive workpiece grades.

Consistent chip control and improved surface integrity

The MK4 chipbreaker is engineered for the short, brittle chips typical of cast iron machining. By actively controlling chip formation, the insert reduces risk of chip entanglement and protects the workpiece surface, delivering a stable cut and consistent finish. The rhombic 35° geometry combined with a 5° clearance angle promotes predictable cutting forces and helps maintain dimensional accuracy in through-feed and facing operations.

Robust cutting edge and reliable process stability

A 0.8 mm nose radius and tolerance class M contribute to a resilient cutting edge that resists edge chipping under interrupted cuts or variable cutting conditions. This robustness translates into fewer indexing steps and more time between insert changes. For production environments where repeatability and uptime matter, the grade’s balance between toughness and wear resistance supports steady machining performance on grey and nodular cast irons.

Easy integration into workshop tool systems

The insert format is compatible with standard toolholder systems that accept the VBMT-style family, allowing quick indexing and immediate return to cutting without complex set-up. As a coated carbide grade within the Tiger·tec Silver series, the component is suitable for ISO group K applications and can be specified where cast iron is the primary workpiece material. Spare part management benefits from common geometries and the wide availability of Walter Tools inserts through industrial distributors.

Secure process reliability with Walter Tools Tiger·tec Silver inserts — contact Metav Werkzeuge for technical consultancy and availability at info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: VBMT160408-MK4-WKK20S-WALTER
• Article name: VBMT160408-MK4 WKK20S Walter Tools
• Brand: Walter Tools

Facts

• Inscribed circle: 16 mm
• Thickness code: 04
• Clearance angle: 5°
• Nose radius: 0.8 mm
• Tolerance class: M

Special features

• Series: Tiger·tec Silver
• Grade: WKK20S (coated carbide)
• Chipbreaker: MK4
• Geometry: Rhombic 35°
• Designed application: Cast iron (ISO group K)
• Execution: T
• Insert designation: VBMT160408-MK4

FAQ

What materials is this insert intended for?
The VBMT160408-MK4 WKK20S insert is intended primarily for cast iron (ISO group K) applications and is optimised for the abrasive, short‑chip behaviour of those materials.

How does the MK4 chipbreaker affect machining of cast iron?
The MK4 chipbreaker creates short, controllable chips in cast iron turning operations, improving chip evacuation and protecting the workpiece surface while stabilising the cutting process.

What benefit does the Tiger·tec Silver coating provide?
The Tiger·tec Silver coating increases wear resistance and reduces flank wear during abrasive machining, extending tool life and improving process economy for serial turning jobs.

Is the insert compatible with standard VBMT toolholders?
The VBMT160408-MK4 format matches common toolholder systems for this insert family, enabling quick indexing and straightforward replacement without special adapters.

How does the 0.8 mm nose radius influence results?
A 0.8 mm nose radius offers a robust cutting edge that tolerates light interruptions and provides a balance between surface finish and edge strength for stable turning cycles.

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

Trademarks and product names are the property of their respective owners. Brand names are used for explanatory purposes only and do not indicate any affiliation between our company and the named manufacturers. The offered item is original, factory‑new merchandise from the manufacturer.