CNMG190612-MK5 WKK20S Wendeplatten - Walter Tools

Take advantage of a specialist grade that combines Tiger·tec Silver coating and the WKK20S substrate for dependable, high‑productivity cast‑iron turning; the robust MK5 chipbreaker and rhombic 80° geometry deliver controlled chips and strong cutting edges for consistent production. Order directly via Metav Werkzeuge or contact the consultants for technical clarification.

CNMG190612-MK5 WKK20S turning insert — Tiger·tec Silver, for cast iron by Walter Tools

The CNMG190612-MK5 WKK20S is a rhombic 80° turning insert optimised for ISO K (cast iron) applications, offering a coated‑carbide grade tailored to abrasive cast‑iron conditions.

• Tiger·tec Silver coated carbide WKK20S
• Designed for cast iron machining (ISO K)
• Rhombic 80° insert with 1.2 mm corner radius
• Negative 0° clearance with MK5 chipbreaker

Reliable cut performance for abrasive cast‑iron work

The combination of WKK20S substrate and Tiger·tec Silver coating creates a coated carbide solution that is engineered for the abrasive nature of cast iron. The formulation balances hardness and toughness so that abrasive wear is resisted while the cutting edge retains strength during interrupted cuts. In practice this means longer edge life and fewer insert changes, improving uptime in medium to high‑volume turning operations. The description above refers specifically to cast‑iron turning (ISO group K) and the grade’s resistance to short, brittle chip formation.

Geometry and chip control for consistent surface quality

The insert’s rhombic 80° form and 1.2 mm corner radius combine to provide a stable cutting engagement and predictable strength at the nose of the tool. The MK5 chipbreaker is designed to produce short, manageable chips on cast‑iron grades, reducing the risk of chip entanglement and promoting safe, repeatable machining. The negative geometry (0° clearance) increases edge robustness for demanding applications and interrupted cuts. Dimensional cues such as the 19 mm inscribed circle and thickness code 06, together with tolerance class M, support accurate seating and repeatable tool offsets in indexable toolholders.

Productivity advantages and process reliability

By choosing this turning insert, shops gain a practical balance between wear resistance and toughness that supports steady throughput and predictable tool change intervals. The coated grade helps maintain surface finish under typical cast‑iron feed rates while the insert shape and chip control reduce downtime associated with poor chip evacuation. For production environments requiring consistent parts per shift, the insert’s characteristics translate into measurable process security and fewer unplanned interventions.

For availability or tailored recommendations on Walter Tools Tiger·tec Silver turning solutions, contact Metav Werkzeuge for expert advice at info@metav-werkzeuge.com or call +49 2822 7131930 to discuss suitable grades and insert geometries

Technical Data

• Article designation: CNMG190612-MK5 WKK20S
• SKU: CNMG190612-MK5-WKK20S-WALTER
• Product type: Turning insert (indexable)

Facts

• Inscribed circle: 19 mm
• Corner radius: 1.2 mm
• Free/clearance angle: 0° (negative)
• Thickness code: 06
• Tolerance class: M

Special features

• Coating: Tiger·tec Silver (coated carbide)
• Grade: WKK20S
• Chipbreaker: MK5
• Insert shape: Rhombus 80°
• Application group: ISO K (cast iron)
• Execution: G (negative geometry)
• Suitable for cast iron machining

FAQ

What materials is this insert intended for?
This insert is designed for cast‑iron workpieces and the WKK20S grade with Tiger·tec Silver coating is optimised for ISO group K materials.

How does the MK5 chipbreaker benefit machining?
The MK5 chipbreaker shapes short, controllable chips on cast iron, improving evacuation and reducing the risk of chip-related interruptions during turning.

What does the 0° free angle mean for performance?
A 0° (negative) clearance increases edge strength and makes the insert more tolerant of interrupted cuts, supporting robust performance under heavy engagement.

Can this insert be used in interrupted cutting or roughing operations?
Yes—thanks to its negative geometry and robust corner radius, this insert is suitable for more demanding turning tasks, including interrupted cuts common in roughing.

What are the dimensional identifiers to check before mounting?
Refer to the article designation CNMG190612-MK5 WKK20S and check the inscribed circle 19 mm, thickness code 06 and the 1.2 mm corner radius to ensure correct seating in the toolholder.

The Walter AG (brand appearance: Walter Tools) is one of the world’s leading manufacturers of precision tools for metalworking. Protected trademarks and brand names remain the property of their respective owners. Mention of trade names serves explanatory purposes only; there is no affiliation between our company and the named manufacturers. The offered article is original and brand‑new.

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