Alumina TiC-based ceramics (Black ceramics)

Alumina TiC-based ceramics are strengthened by adding hard carbide to highly pure alumina. This process results in ceramic materials that shows excellent performance in either wet or dry cutting conditions. As an added benefit, hardness and toughness has been improved which enables the machining of partially interrupted cuts. This ceramic material has both high-hot hardness and low plasticity needed to cut hardened materials.

Gray cast iron, Finishing, WET, Black ceramic

Gray cast iron, Finishing, WET, Black ceramic

Machining of hardened materials

Machining of hardened materials

HC2

The standard grade for machining cast iron and hardened materials

HC2

Mill roll
240 SFMMill roll
.008 IPR
.020" - .120" DOC
DRY
NTK : HC2 20 pcs
Competitor's
black ceramic
10 pcs
Features
  • Well-balanced content of aluminum oxide and titanium carbide (Al2O3 +TiC) sintered under pressure
  • Stable performance under a wide range of machining conditions
  • General purpose ceramic which works well in a wide range of cutting applications
Grade Work material Application Purpose Cutting speed (SFM) Feed
(IPR)
Depth of cut (inch) DRY WET
HC2 Gray cast iron Turning Semi finish-Finish 1200-2100 .004-.016 .020-.060
Mill rolls (Cast iron) Turning Semi finish-Finish 150-500 .003-.008 .020-.140  

HC5

Developed for Mill Rolls

HC5

Mill roll
Chilled cast ironMill roll
230 SFM
.016 IPR
.394" DOC
DRY
NTK : HC5 4 pass
Competitor's
black ceramic
2 pass
Features
  • Developed for use in hard turning applications for mill rolls
  • Excellent toughness combined with wear resistance
Grade Work material Application Purpose Cutting speed (SFM) Feed
(IPR)
Depth of cut (inch) DRY WET
HC5 Mill roll
(Cast iron)
Turning Rough-Finish 450-600 .004-.012 .025-.075  
Mill roll
(Steel)
Turning Rough-Finish 450-600 .004-.012 .025-.075  

HC6

For machining ductile cast iron

HC6

Differential case
Ductile cast ironDifferential case
900 SFM
.008 IPR
.020" DOC
WET
NTK : HC6 60 pcs
Competitor's
coated carbide
30 pcs
Features
  • Designed specifically for finish turning of ductile / nodular cast irons
  • TiC-based ceramic with improved wear resistance at high cutting speed
Grade Work material Application Purpose Cutting speed (SFM) Feed
(IPR)
Depth of cut (inch) DRY WET
HC6 Ductile cast iron Turning Finish 600-1500 .004-.012 -.040

ZC4

For machining hardened materials

ZC4

Side gear
Case carburizing steelSide gear
Hardness : HRC63
400 SFM
.004 IPR
.006" DOC
DRY
NTK : ZC4 60 pcs
Competitor's
black ceramic
30 pcs
Features
  • TiN-coated premium ceramic grade with the finest grain size of all the NTK ceramic grades
  • Best for hard turning applications from (HRC 55 - 70)
  • The gold coating makes edge wear easily detectable
Grade Work material Application Purpose Cutting speed (SFM) Feed
(IPR)
Depth of cut (inch) DRY WET
ZC4 Hardened material
(HRC55-70)
Turning Finish 130-700 .003-.008 .005-.030

ZC7 / HC7

For machining hardened parts with a wide range of hardness

ZC7 / HC7

Gear
Carburized and
hardened steel
Gear
300 SFM
.005 IPR
.006" DOC
WET
NTK : ZC7 80 pcs
Competitor's
CBN
80 pcs
Features
  • Excellent wear resistance in a wide range of applications such as machining carburized or induction hardened steels (HRC 30 - 62)
  • High quality surface finishes with wiper facet inserts
  • TiN coated ZC7 is available in various geometries as standard
Grade Work material Application Purpose Cutting speed (SFM) Feed
(IPR)
Depth of cut (inch) DRY WET
ZC7
HC7
Hardened material
(HRC30-62)
Turning Finish 130-700 .003-.008 .005-.030
Mill roll
(Steel / Cast iron)
Turning Rough - Finish 450-600 .004-.012 .025-.075