SPGT 120404 NS9530 Wendeplatten - Tungaloy

Take advantage of the combination of precision finishing, low cutting forces and ISO compatibility for reliable turning results; order the insert via Metav Werkzeuge or consult our specialists for application advice.

SPGT 120404 NS9530 turning insert — Tungaloy, uncoated cermet for finishing

The SPGT120404L-W20 NS9530 insert is an ISO-format, square turning insert designed for fine finishing of steel components, optimised for continuous cuts and small depths of cut.

• Square ISO insert, 12 mm size
• Uncoated cermet grade NS9530
• Sharp edge for fine surface finish
• 11° relief angle and 0.4 mm corner radius

High-precision finishing with low cutting effort

The SPGT120404L-W20 NS9530 insert is specified as a finishing grade for steel and delivers a high surface finish thanks to its sharp cutting edge and uncoated cermet composition. The combination of low cutting forces and a stable cutting edge reduces deflection in slender parts, which means surface integrity is preserved and subsequent machining or polishing steps can often be minimised. For continuous cuts and small depths of cut this geometry is particularly effective, producing repeatable part quality in serial production.

ISO compatibility and secure clamping for predictable results

This insert is part of an ISO turning insert series, so compatibility with a holder is determined by the insert’s shape, relief angle, tolerance class, clamping type, size and thickness. The 11° relief angle and standard mounting with a cylindrical hole and single-sided countersink ensure reliable seating and torque transmission when combined with a matching external holder or boring bar. Using the correct holder and clamping set reduces vibration and secures repeatable positioning, enabling predictable process behaviour on automated lathes.

Geometry that balances edge strength and surface quality

A 0.4 mm corner radius provides a balanced compromise between edge robustness and an ability to achieve fine finishes on external and internal profiles. The square 12 mm plate form and 4.76 mm thickness offer a solid support area that aids heat dissipation and edge stability during finishing operations. The integrated W20 chipbreaker is tuned for the intended regime, controlling chip flow on small depths of cut and helping to avoid built-up edge on steels when feeds and speeds are set for finishing performance.

System approach and application guidance for turning

The recommended system consists of the ISO insert, a suitable external holder or boring bar, plus an underlay/clamping set and replacement screws. Selection of chipbreaker and grade should be matched to the workpiece material and the process stability: the NS9530 grade is best used for steel finishing where continuous cut conditions prevail. Typical applications include external and internal turning where surface quality and minimal cutting forces are priorities; care should be taken to match feed and speed to the cermet finishing regime to prevent thermal overload.

For focused finishing of steel components, specify the Tungaloy NS9530 SPGT ISO insert and contact Metav Werkzeuge for availability, cutting-parameter recommendations and application support at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 6997941-Tungaloy
• Manufacturer SKU: TUN6997941
• Manufacturer article number: 6997941
• Brand: Tungaloy

Core dimensions

• ISO designation: SPGT120404L-W20
• Insert size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.4 mm
• Relief angle: 11°
• Insert shape: square (90°)
• Hole: with hole — cylindrical hole + single-sided countersink (40°–60°)

Features & compatibility

• Material: carbide
• Grade/coating: uncoated cermet NS9530
• Chipbreaker: W20
• Typical application: turning (external and internal)
• System composition: ISO insert, holder or boring bar, underlay/clamping set, replacement screws

FAQ

Which materials is this insert suited for?
The SPGT120404L-W20 NS9530 insert is specified as a finishing grade for steel and is optimised to produce excellent surface quality under continuous cutting conditions.

What chipbreaker should be used for finishing steel?
The insert is supplied with a W20 chipbreaker, which is designed for small depths of cut and continuous finishing operations on steels with the NS9530 cermet grade.

How is the insert secured in the holder?
The SPGT120404L-W20 features a cylindrical hole with a single-sided countersink (40°–60°); matching the insert to a compatible holder and clamping set ensures correct seating and repeatable positioning.

What geometric data matter when selecting a holder?
Key dimensions are the 12 mm size, 4.76 mm thickness, 0.4 mm corner radius and 11° relief angle; these determine clearance, support and the appropriate clamp and seat in the holder.

Is this insert suitable for internal and external turning?
Yes — the ISO-format insert is intended for both external and internal turning; toolpath planning should match the finishing regime for optimal surface results.

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.