CNMG 120412 T5125 Wendeplatten - Tungaloy

Take advantage of the combination of a CVD-coated carbide grade engineered for stable chip formation and an 80° rhombic geometry with a 1.2 mm corner radius to maintain productivity in interrupted turning on cast iron; order directly via Metav Werkzeuge or consult our specialists for application advice.

CNMG120412 T5125 Turning Insert — 80° rhombic, 1.2 mm radius (Tungaloy)

The CNMG120412 T5125 is an ISO-standard rhombic indexable insert designed for external and internal turning, optimised for interrupted cuts and less stable setups in cast iron machining.

• CVD-coated carbide grade T5125
• For cast iron, interrupted cuts
• Double-sided chipbreaker design
• Rhombic 80° geometry, 1.2 mm radius

Predictable chip control for interrupted turning

The insert combines a CVD-coated carbide substrate with a double-sided chipbreaker that promotes consistent chip formation even under interrupted cutting conditions. This results in fewer unplanned tool changes and more stable cutting forces during cyclical engagements. The engineered chip flow reduces the risk of built-up edge on brittle materials and helps to preserve the cutting edge for longer, which supports a steady production rhythm in daily turning operations.

Clear compatibility and simple mounting logic

Compatibility with toolholders is determined by form, relief angle, tolerance class, fastening method, size and thickness; the ISO designation ensures interchangeability when those parameters match. The plate requires an appropriate outer holder or boring bar together with the correct shim/clamping set and fastening screw. This systematic approach enables fast reconditioning of the tool assembly and reduces downtime by making insert changes straightforward and repeatable.

Coating and substrate tailored for cast iron applications

The carbide substrate paired with the T5125 coating provides a tougher grade that copes well with impact and interrupted cuts common in cast iron turning. The 1.2 mm corner radius balances edge strength and profile accuracy, helping to resist chipping while maintaining acceptable surface finish. The CVD layer improves wear resistance and thermal stability, translating technical coating properties into practical benefits: more consistent component quality and longer intervals between index changes.

Geometry and handling for consistent productivity

The 80° rhombic geometry delivers predictable approach angles and versatile orientation for both external and internal operations. Being a double-sided insert, it offers economical indexability while the central cylindrical hole supports secure clamping. As part of an ISO-based system, this insert integrates into established tooling setups to enable rapid changeover and maintain machining cadence, thus supporting throughput targets and process reliability on the shop floor.

For robust cast-iron turning choose the Tungaloy CNMG120412 T5125 insert — contact Metav Werkzeuge for tailored advice or ordering at info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 6850144
• SKU: 6850144-Tungaloy
• Manufacturer SKU: TUN6850144
• Manufacturer: Tungaloy
• Model series: ISO turning indexable inserts

Numbers / Core Technical Data

• Insert designation: CNMG120412
• Geometry angle: 80°
• Corner radius: 1.2 mm
• Insert size: 12 mm
• Thickness: 4.76 mm
• Relief angle: 0°
• Hole style: cylindrical centre hole

Design & Special Features

• Grade T5125, CVD-coated carbide
• Double-sided chipbreaker
• Rhombic shape
• With cylindrical hole for secure clamping
• Designed for turning applications
• Suited to cast iron, especially interrupted cuts
• Holder compatibility determined by form, relief angle, tolerance class, fastening, size and thickness

FAQ

Which materials is this insert intended for?
The CNMG120412 T5125 insert is specified primarily for machining cast iron, with the grade and chipbreaker tailored to interrupted cutting conditions typical of that material.

How is compatibility with a toolholder checked?
Compatibility is confirmed by matching the insert form, relief (freeside) angle, tolerance class, fastening method, size and thickness to the holder; the ISO designation CNMG120412 helps to identify the correct matching holder.

What performance benefits does the T5125 CVD coating provide?
The T5125 coating on the carbide substrate increases wear resistance and thermal stability, improving edge life and helping to maintain dimensional consistency during repetitive interrupted cuts.

Why choose the 1.2 mm corner radius and 80° geometry?
The 1.2 mm corner radius strengthens the cutting edge against chipping, while the 80° rhombic geometry gives versatile orientation for external and internal turning, offering a balance between tool life and surface finish.

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.