SPMT 120408 T515 Wendeplatten - Tungaloy

Take advantage of the combination of economical grade selection, robust CVD-coated carbide and a precise 0.8 mm corner radius to secure stable, repeatable turning of cast iron components; order directly via Metav Werkzeuge or ask the consultants for application support and tool pairing.

SPMT SPMT120408 T515 turning indexable insert by Tungaloy — CVD-coated carbide, 90° square

The SPMT120408 T515 is an ISO-designated square indexable insert engineered for economical and productive turning of cast iron components, compatible with standard ISO holders.

• SPMT 120408 geometry, 90° square
• CVD-coated grade T515
• 0.8 mm corner radius for edge strength
• Cylindrical hole with 40°–60° countersink

Consistent performance for cast iron turning

The CVD-coated carbide composition of this insert, specified as grade T515, is tuned for economical machining of cast iron. The CVD (chemical vapour deposition) coating adds a hard, wear-resistant layer that improves edge life and reduces adhesion from grey cast iron. As a result, the tool delivers predictable tool life and reduced tooling costs in mass production and batch runs. For users unfamiliar with coatings: CVD applies a thin, uniform ceramic layer that protects the substrate during abrasive and thermal wear, helping to maintain dimensional stability over longer cycles.

Secure seating and geometry that reduces vibration

A 90° square geometry combined with a 4.76 mm plate thickness and the central cylindrical hole with single-sided countersink (40°–60°) ensures reliable clamping and axial stability in ISO-compatible holders. The specified 11° clearance prevents rubbing on the workpiece flank and facilitates positive cutting engagement. Together, these design elements reduce chatter, improve surface finish and allow higher feed rates where rigidity permits, which directly contributes to shorter cycle times and improved process reliability.

Edge form and chip control tuned for productivity

The single-sided chipbreaker and 0.8 mm corner radius balance edge strength and chip formation for common turning tasks. A defined radius improves resistance to edge chipping during moderate interruptions, while the chipbreaker geometry guides chips away from the cutting zone—important when machining interrupted sections or variable section workpieces. Selecting the correct holder and stable setup in combination with this insert’s chip control will help to maintain constant surface quality and lengthen intervals between index changes.

Practical compatibility and selection guidance

This insert belongs to the ISO turning indexable insert family; compatibility with a holder depends on form, clearance angle, tolerance class, fastening, size and thickness. The SPMT format (120408) denotes the insert outline and size; the square form and standard mounting hole make it interchangeable with many ISO seats. For inner and outer turning, match the chipbreaker and grade to the part’s rigidity and the cutting conditions. If further machining parameters or holder recommendations are required, Metav Werkzeuge can supply measured guidance and pairing suggestions to ensure optimal integration into existing tool systems.

For tailored advice on integrating Tungaloy SPMT120408 inserts into production and for immediate availability, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 6742152
• SKU: 6742152-Tungaloy
• Manufacturer SKU: TUN6742152
• Model series: ISO turning indexable inserts
• Material: carbide
• Grade/coating: T515 (CVD-coated)

Facts

• Designation: SPMT120408
• Plate size: 12 mm
• Plate thickness: 4.76 mm
• Corner radius: 0.8 mm
• Clearance angle: 11°
• Geometry angle: 90°

Special features

• Square insert form
• Cylindrical hole with one-sided countersink (40°–60°)
• Single-sided chipbreaker
• Intended for turning of cast iron
• ISO-standardised for holder compatibility
• System components: insert, external holder or boring bar, shim/clamping set and replacement screw

FAQ

What machining operations are suitable for this insert?
The SPMT120408 T515 indexable insert is intended for external and internal turning, with the T515 grade optimised for economical machining of cast iron.

How does the CVD coating affect performance?
A CVD-coated carbide insert like this offers improved wear resistance and thermal stability, which extends tool life and stabilises cutting when machining abrasive cast iron grades.

Which features improve clamping reliability?
The square form, standard hole and one-sided countersink ensure secure seating in ISO-compatible holders, while the 4.76 mm thickness contributes to reduced deflection under load.

Is this insert suitable for interrupted cuts?
Yes; the 0.8 mm corner radius and robust substrate make the insert more tolerant of moderate interruptions, but selection should consider workpiece rigidity and holder stability.

How to match the insert to a toolholder?
Compatibility is determined by form, clearance angle, tolerance class, fastening method, size and thickness; ensure the holder corresponds to the SPMT120408 designation and the 11° clearance for correct seating and rake relationship.

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.