CNMG 120412 T5125 Wendeplatten - Tungaloy

Combine reliable chip control, a CVD-coated carbide grade and ISO compatibility to secure consistent turning performance in less stable conditions; order the insert directly via Metav Werkzeuge or consult our technical advisers for application support.

CNMG120412 T5125 Tungaloy indexable insert — CVD-coated carbide, 1.2 mm nose radius

The CNMG120412 T5125 Tungaloy indexable insert is a rhombic ISO turning insert engineered for external and internal turning of cast iron where interrupted cuts or limited rigidity occur.

• CVD-coated carbide grade T5125
• Optimised for cast iron and interrupted cuts
• Rhombic CNMG form with 80° lead angle
• Double-sided chipbreaker, 1.2 mm nose radius

Robust cutting performance for demanding turning operations

The combination of CVD-coated carbide and the T5125 grade delivers a tougher cutting edge that tolerates interruptions and reduced stability during machining. This grade is formulated for improved fracture resistance, which translates into fewer insert failures and more predictable tool life when working with cast iron. The double-sided chipbreaker helps control chips and reduces re-cutting, improving surface integrity and process reliability in serial production.

System compatibility and practical mounting benefits

Designed to ISO specifications, the insert’s rhombic shape and standard dimensions ensure compatibility with a wide range of external holders and boring bars. Compatibility is determined by form, relief angle, tolerance class, fastening method, size and thickness; matching these ensures correct seat and clamping for consistent cutting geometry. The insert’s 80° lead angle and 1.2 mm nose radius offer a balanced compromise between strength and surface finish for typical turning tasks.

Benefits of choosing the right grade and geometry

Selecting T5125 provides a benefit-oriented approach: better resistance against chipping in interrupted cuts and a broader material range for cast-iron workpieces. The CVD coating enhances wear resistance at the cutting edge while maintaining reliable edge stability. For process planning, this means fewer tool changes and steadier cycle times, which supports productivity targets and reduces unexpected downtime.

Practical tips for application and optimisation

Use a rigid set-up and select a holder that matches the insert’s geometry to exploit the ISO CNMG form fully. Moderate cutting parameters and appropriate cooling or lubrication improve tool life when turning cast iron with interrupted features. Where surface finish is critical, reduce feed or select a finer nose radius; conversely, for heavy roughing, the robust geometry and coating combination maintain cutting integrity.

Contact Metav Werkzeuge for tailored recommendations on holder selection and cutting parameters for the Tungaloy CNMG120412 T5125 insert, or request an application review from our technical team.

Technical Data

• Article number: 6850141
• SKU: 6850141-Tungaloy
• Manufacturer SKU: TUN6850141
• Designation: CNMG120412 T5125 Tungaloy-Wendeplatte
• Model series: ISO-Drehwendeschneidplatten

Facts

• Insert size: 12 mm
• Thickness: 4.76 mm
• Nose radius: 1.2 mm
• Relief angle: 0°
• Lead/approach angle: 80°
• Hole: with hole (cylindrical)

Special features

• Material: carbide
• Coating: CVD-coated
• Grade: T5125
• Shape: rhombic (CNMG)
• Chipbreaker: double-sided
• Application: turning
• Typical use: cast iron, interrupted cuts

FAQ

What materials is this insert best suited for? The CNMG120412 T5125 Tungaloy indexable insert is optimised for cast iron machining, particularly where interrupted cuts or less rigid set-ups are encountered.

How does the T5125 grade affect tool life? The T5125 grade combines a tougher substrate with a CVD-coated carbide surface to resist chipping and enhance wear performance, resulting in more consistent tool life for demanding turning tasks.

Which holders are compatible with this ISO insert? Compatibility depends on matching the holder’s seat to the insert’s rhombic CNMG form, relief angle, tolerance class, fastening, size and thickness; using standard ISO CNMG holders ensures proper clamping and repeatability.

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.