Cost-saving turning of hardened materials

Hard turning Cost-saving turning of hardened materials

12.06.2021Editor: MA Alexander Stark

With its latest HX5 grade incorporated into the NTK Ceramix range, the Japanese cutting tool manufacturer has launched what it claims to be the ultimate ceramic grade for finishing hardened materials.

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The new HX5 grade from the “NTK Ceramix” range is suitable for machining at depths of cut from 0.1 to 0.5 mm.
(Source: NTK Cutting Tools)

NTK has developed its NTK Ceramix ceramic material to replace CBN in hard turning applications. This series has now been extended with the launch of the HX5 grade. The ceramic cutting tool specialist has introduced this grade to not only match the performance of CBN but also yield cost-saving characteristics when undertaking hard turning applications. Introduced for the continuous machining of materials with a hardness of 55 to 65HRc, the new TiAlN coating on the HX5 inserts offers high wear resistance for hard turning.

The new grade is capable of machining at a cutting speed of 100 to 200 m/min and at a feed rate of 0.07 to 0.5 mm/per rev. As a finish turning grade for challenging material types, the new grade is suitable for machining at depths of cut from 0.1 to 0.5 mm.

The new HX5 is available with four different geometry deviations, the CHGA, DNGA, VNGA and the triangular TNGA. All four variants are available with the choice of a 0.4, 0.8 and a 1.2 mm corner radius that prolongs tool life whilst maintaining a robust cutting edge. Each insert geometry is 4.76 mm thick with the CNGA and DNGA inserts incorporating a 2.7 mm IC whereas the TNGA and VNGA designations have an IC of 9.35 mm.

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