NTK Technical Newsletter

 
 

Machining Hardened Materials

with Ceramic and CeramiX

 

Cost reductions and increased part production with faster cutting speeds 

Success with our Grades

  • Use the strongest possible insert shape to maximize insert strength.
  • Ceramic is a hard material therefore, the insert needs some edge preparation in order to withstand cutting forces and optimize performance. 
  1.  Light edge preps T styles ( T-land:  T0425  & T0525)
  2.  Heavy edge preps:  Z and S style ( T-land and honed edge: Z0820, Z0825, S0820, S0825) or  J, P, and Q style (Double Chamfered and Honed edge: P4815,  P8015, Q8015)
  • Utilize positive geometries for close tolerances or thin-walled parts.
  • As material hardness goes up the SFM goes down.
  • If multiple passes are required with one edge, vary the DOC to move the wear on the insert edge and improve tool life.
  • If you encounter chatter, increase your feed rate. Heavy chatter is often a sign of the tooling being above centerline or too much toolholder overhang. The machine, part and tooling set-up must be rigid.
Hardness vs. SFM Diagram | DOC & Feed Chart
 
 

NEW HX5 CeramiX

  • Matches performance characteristics of CBN
  • New TiAlN coating offers excellent wear resistance for hard turning
  • Continuous machining of materials with hardness of 55 to 65 Rc
  • Geometries: CNGA, DNGA, TNGA, VNGA
 
HX5 Details
 

Alumina TiC based Ceramic + TiN Coat

ZC4

  • Best for finishing hardened materials from 62 - 70 HRC
  • Insert Wiper feature "WL"  with T0525 edge prep to improve surface finish

ZC7

  • Finishing carburized or induction hardened steels 30 - 62 Rc.
  • Semi-finishing and finishing cast iron & chilled iron
  • Insert Wiper feature "WL" with T0425 edge prep to improve surface finish
  • AG  chip breaker with Z0430 edge prep -  improve machining efficiency
ZC4 / ZC7
 

Alumina TiC based Ceramics (Al2O3+TiC)

HC2 

  • Semi-finishing to finishing of cast iron mill rolls
  • Machining steels hardened from 50-62 Rc
 

HC5

  • Developed for hard turning mill roll applications 
  • Machines through scale and interruptions
  • Roughing to finishing of cast iron and steels 35 - 62 Rc
  • Success on CPM rolls (also known as Hitachi rolls)

HC7

  • Turning carburized or induction hardened steels 35 - 62 Rc.
  • Semi-finishing and finishing cast iron & chilled iron
  • Machines through interruptions
  • Milling hard materials with our RPG and RNG inserts in our AHM series cutters 
 
 

Whisker Ceramic

WA1

  • Roughing to semi-finishing of carbide mill rolls
  • Semi-finish to finish cast iron roll
  • Milling hardened steels with RPG and RNG inserts in our AHM series cutters
Milling
 

SiAlON Ceramic

SX9​

  • A go to grade for many High Temp Alloy machining applications is finding success in hard material applications
  • Blend of strength from silicon nitride with heat and wear resistance of alumina oxide to machine even the most demanding applicaitons
  • Effectively turning cast iron rolls
  • Milling hardened steel and stainless steel parts (35 - 46 RC)
Video LNM6688 SX9
Contact NTK
 

 Literature

Product  and  technical  information 

 
Download PDF
 

TIP of the MONTH

Tool Path Programming

Ceramic inserts do not like to make drastic changes direction and like to stay on the part.

Consider your entry path onto the part

  • Straight facing will produce initial contact notching in cutting area and reduce tool life.
  • Instead try ramp approach: initial contact notching will occur outside of cutting area on insert.
 
 

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Noteworthy

COMING SOON: Watch for an upcoming Cut-off Tooling Promotion which will include our CX and TH inserts.

More Amazing New Products to be released in the coming  months that deliver true results for productivity and cost reductions.  So be sure to keep an eye out for Product Details.

New BIDEMICS - JP0

New Material grade - HX5

Interested in a Product Webinar between our engineering group and your team?  Complete the form and submit - We will make it happen. ​

Technical Session Request
 

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