Iwaki, Japan – October 2026 – Tungaloy Corporation (President: Satoshi Kinoshita, Head Office: Iwaki City, Fukushima Prefecture) has expanded its NS9530 cermet grade inserts with 20 new -TM chipbreaker options. The new inserts come in five insert shapes (CNMG, DNMG, TNMG, VNMG, and WNMG), each in both standard and cost-effective ISO-EcoTurn versions. The -TM chipbreaker offers an excellent alternative to the -TS chipbreaker— Tungaloy’s first choice for applications ranging from semi-finishing to medium cutting—when greater resistance to chipping and breakage is needed. The -TM is also suitable for light interrupted cuts.
Challenges and Trends
In steel turning, the semi-finishing to medium cutting stages are critical phases that require a balance between quality and productivity. Particularly in turning operations for automotive parts and general machinery components such as shafts and gears, frequent chipping and tool breakage can lead to unstable machining and adversely affect the finished surface of the products. Furthermore, even at low to medium cutting speeds, stable surface finish and long tool life are required, which presents a major challenge for users. To address these requirements, tool designs suited for the types of cut, including the intensity of interruptions, as well as the cutting parameters, are essential, and market demand is growing for tools capable of delivering stable machining performance.
Product Overview
The NS9530 cermet grade combines hardness and toughness through Tungaloy’s latest surface treatment technology, delivering outstanding chipping resistance and wear resistance. By minimizing surface irregularities and significantly reducing built-up edge formation, it contributes to improved surface finish. Suitable for a wide range of applications from continuous to interrupted cuts, NS9530 enables excellent surface quality and stable machining performance.
Benefits and Features
■NS9530
Feature 1: Outstanding chipping resistance and wear resistance through a smooth, tough surface layer
– Optimized composition and grain-size distribution from the insert surface to the substrate provide an excellent balance of hardness and toughness.
– 25% greater fracture toughness on the insert surface compared with conventional grades.
Feature 2: Superior surface finish and stable tool life enabled by proprietary surface technology
– Significantly reduced irregularities on the insert surface minimize built-up edge formation.
– Delivers improved wear resistance and a bright, high-quality surface finish.
Feature 3: Greater stability in tooling costs through the use of cermet
– Less susceptible to fluctuations in tungsten prices than carbide grades.
■TM Chipbreaker
Feature 1: An alternative choice for semi-finishing to medium cutting applications when chipping resistance is a priority
– Ideal for operations where chipping can be an issue with the -TS chipbreaker, and also suitable for light interrupted cuts.
– Reduces edge chipping and fracture, contributing to stable machining performance.
Feature 2: Tough cutting edge and 3D chipbreaker geometry optimized for high-feed machining
– Well suited for high-efficiency machining of forged steel components and similar workpieces.
Feature 3: Available in ISO-EcoTurn version
– Contributes to lower tooling costs and reduced material consumption.
Cutting Performance
■ Comparison of surface quality
| Insert | CNMG120408-TM |
| Workpeice | S45C / C45 |
| Cutting speed | Vc = 150 m/min |
| Feed | f = 0.15 mm/rev |
| Depth of cut | ap = 1 mm |
| Work process | Continuous cutting |
| Coolant | Wet |
NS9530 provides a superior glossy surface finish compared with carbide inserts.
