CNMG 120412 T515 Wendeplatten - Tungaloy

Take advantage of CVD-coated carbide and a double-sided chipbreaker for economical, high-throughput turning of cast iron; the ISO compatibility and robust 80° geometry ensure predictable tool life and easy integration into existing tool holdings. Order the insert directly via Metav Werkzeuge or consult our advisors for holder compatibility.

CNMG120412 T515 turning insert (Tungaloy) — CVD-coated carbide, double-sided chipbreaker

The CNMG120412 T515 is an ISO-standard rhombic turning insert designed for efficient external and internal turning, optimised specifically for economical machining of cast iron.

• CVD-coated carbide for extended life
• Optimised for cast iron machining
• Double-sided chipbreaker for reliable chip control
• ISO CNMG 120412, 80° geometry

Consistent productivity for cast iron with CVD-coated carbide

The CVD-coated carbide grade T515 offers a balanced combination of wear resistance and edge stability, tailored to the demands of cast iron turning. By using this grade, workshops benefit from a predictable tool life and reduced frequency of index changes, which translates directly into lower machining cost per component. The insert’s double-sided chipbreaker improves chip formation under a wide range of feeds and depths, reducing risk of chip entanglement and helping maintain cycle time consistency on batch production runs.

Clear guidance on holder compatibility and fit

Compatibility with tool holders is governed by the insert’s form, clearance angle, tolerance class, clamping method, size and thickness. The rhombic shape and 80° cutting geometry demand a matching ISO CNMG pocket and a secure clamping arrangement. For practical selection, pair the insert with a suitable external holder or boring bar that supports a 12 mm seating width and a 4.76 mm plate thickness; this ensures correct seating and repeatable positioning for accurate turning operations.

Process advantages: chip control and surface quality

Good chip control reduces machine downtime and improves part finish; the integrated chipbreaker is optimised for interrupted and continuous cuts in grey and nodular cast iron. With a corner radius of 1.2 mm, the insert balances edge strength and surface integrity, enabling stable feeds while avoiding excessive cutting forces. The CVD coating contributes to consistent surface quality by resisting built-up edge formation and maintaining a sharper cutting profile for longer.

Practical application and selection advice for production environments

Select the chipbreaker and grade according to workpiece stability, the presence of interruptions, and desired cutting speed. The indexable design allows two usable cutting edges per side, supporting economical use in high-volume turning. If uncertainty remains about the best holder geometry or machining parameters for a specific casting grade, technical consultation is recommended to align the insert selection with fixture rigidity and machining strategy.

Contact Metav Werkzeuge (info@metav-werkzeuge.com / +49 2822 7131930) for supply and application advice on the Tungaloy CNMG120412 T515 insert and matching holders

Technical data

• Article number: 6740674
• Manufacturer SKU: TUN6740674
• SKU: 6740674-Tungaloy
• Model series: ISO turning indexable inserts
• ISO designation: CNMG120412
• Grade: T515
• Manufacturer: Tungaloy

Facts

• Corner radius: 1.2 mm
• Insert size: 12 mm
• Thickness: 4.76 mm
• Clearance angle: 0°
• Cutting angle: 80°

Special features

• CVD-coated carbide
• Double-sided chipbreaker
• Rhombic shape
• Cylindrical hole
• With hole
• Suitable for turning; optimised for cast iron machining
• Compatible with ISO-standard holders (form, clearance angle, tolerance class, clamping and size determine fit)

FAQ

Is this insert suitable for machining cast iron?
The CNMG120412 T515 insert (Tungaloy, SKU 6740674-Tungaloy) is specifically graded for economical machining of cast iron and is optimised to provide stable chip formation and consistent edge life.

Which holders are compatible with this ISO insert?
Compatibility depends on holder form, clearance angle, tolerance class, clamping method and size; the CNMG120412 T515 requires an ISO CNMG pocket and a holder that supports a 12 mm insert seating and 4.76 mm plate thickness.

Can the insert be indexed and used on both sides?
Yes, the indexable design of the CNMG120412 T515 allows use of multiple cutting edges; the double-sided chipbreaker supports reliable chip control when re-indexing the insert.

How does the 1.2 mm corner radius affect performance?
The 1.2 mm corner radius on the CNMG120412 T515 provides a balance between edge strength and surface finish, enabling stable feeds while reducing the risk of premature edge chipping in cast iron turning.

What benefits does the CVD coating provide?
The CVD-coated carbide of the CNMG120412 T515 enhances wear resistance and reduces built-up edge tendencies, helping to maintain surface quality and extend the usable life of the cutting edge.

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.