CNMG 120412 KS20 Wendeplatten - Tungaloy

Take advantage of a combination of wear-resistant KS20 carbide, stable CNMG geometry and a double-sided chipbreaker for continuous, predictable turning operations; order replacements quickly via Metav Werkzeuge or consult their technical team for application-specific recommendations.

CNMG 120412 KS20 indexable turning insert — ISO-standard insert for turning, rhombic 80° geometry, Tungaloy

The CNMG120412 KS20 is an ISO-indexed turning insert intended for external and internal turning with a rhombic 80° profile and double-sided chipbreaker

• 80° rhombic geometry for versatile turning
• KS20 Tungaloy carbide grade for wear resistance
• Double-sided chipbreaker for extended tool life
• Cylindrical hole for secure mounting

Engineered for durable, predictable cutting performance

The insert is manufactured from carbide and supplied in the KS20 grade from Tungaloy, developed to balance wear resistance and edge stability. This composition delivers a reliable cutting edge under a range of machining conditions, reducing unplanned tool changes and improving process uptime. The ISO conformity of the indexable plate supports straightforward replacement and inventory control in production environments, while the double-sided design multiplies usable cutting edges for cost-effective usage.

Precise geometry that supports consistent surface finish

A rhombic shape with an 80° included angle and a corner radius of 1.2 mm provides predictable cutting forces and a controlled chip flow for many turning tasks. The insert’s thickness 4.76 mm and size 12 are standardised so compatibility with matching holders is determined by shape, relief angle (0°), tolerance class, clamping method and plate dimensions. These geometrical parameters contribute directly to machining stability and help achieve repeatable dimensional accuracy and surface quality on components.

Chip control and application scope that reduce cycle times

The integrated double-sided chipbreaker and the cylindrical hole design ensure secure clamping and steady chip formation in both external and internal turning. When paired with the correct external holder or boring bar and the appropriate clamping set, the insert supports a wide material spectrum and cutting regimes. This configuration lowers the risk of edge failure, shortens cycle time by allowing higher metal removal rates in many operations and simplifies edge indexing during service.

System-level advantages for workshop efficiency

As part of a complete tooling system — indexable plate, compatible holder, underlay/clamping set and spare screws — this insert promotes rapid changeover and reduced inventory complexity. The double-sided format and ISO standardisation make stock rotation and tool management straightforward, enhancing the total cost of ownership. For less experienced staff, the clear geometric and system parameters reduce setup errors; for production managers the consistent performance delivers improved throughput and predictable tool consumption.

Contact Metav Werkzeuge for tailored tool selection and fast supply of Tungaloy CNMG120412 KS20 indexable inserts — expert advice and application support are available to match the insert to the workpiece and holder configuration

Technical data

• Article number: 6802183
• Manufacturer SKU: TUN6802183
• Model series: ISO-Drehwendeschneidplatten
• Material: Hartmetall
• Brand: Tungaloy

Facts

• Corner radius: 1.2 mm
• Thickness: 4.76 mm
• Size (inscribed circle): 12 mm
• Included angle: 80°
• Relief angle: 0°

Special features

• KS20 carbide grade by Tungaloy
• Rhombic plate shape
• Double-sided chipbreaker
• Cylindrical hole for secure mounting
• Intended for external and internal turning
• Compatibility depends on shape, relief angle, tolerance, clamping, size and thickness
• System build: ISO insert, matching external holder or boring bar, underlay/clamping set and spare screws

FAQ

What materials can be machined with this insert?
The CNMG120412 KS20 insert is a general-purpose carbide grade designed for robust wear resistance and edge stability; it suits a wide range of turning applications when the correct chipbreaker and cutting parameters are selected.

How does the KS20 grade affect tool life?
The KS20 grade from Tungaloy combines hardness and toughness to resist abrasive wear while maintaining edge integrity, which typically extends effective tool life in stable turning operations.

Is the insert compatible with standard ISO CNMG holders?
Yes, the insert follows ISO plate dimensions; compatibility with a given holder is determined by plate form, relief angle (0°), tolerance class, clamping style, size and thickness.

Can the insert be indexed multiple times?
The double-sided design provides multiple usable cutting edges; indexing restores a fresh edge and helps to maximise the number of cuts per plate.

Manufacturer/Responsible: Tungaloy-NTK Germany GmbH, Katzbergstraße 3a, 40764 Langenfeld - Protected trademarks and product names are the property of their respective owners. Brand names and protected trademarks are mentioned solely for explanatory purposes. There is no affiliation between our company and the mentioned brands. The item offered is an original, brand-new product from the manufacturer.