CTP/CTPA-CXchipbreakerFor cut-off operations with max. diameter up to .630"| Swiss CNC lathes

Tightly curls chips to prevent tangling

CX molded chipbreaker curls and controls chips. Prevents damage to machined surface by directing chips away from the part surface

Eliminates cutting edge chipping during cut-off operations.
Ideal for stainless steel materials with high nickel content (304SS, 316SS, and 630SS)

Product video


  • NTK's best selling CTP & CTPA series with full lineup of tooling for difficult to cut stainless steel applications.
  • CX chipbreaker provides outstanding chip control and stable machining.
  • Effective cut-off results on austenitic and precipitation hardened stainless steels.

Tooling application

Swiss CNC lathe cut-off operations

Chip control comparison

Cutting conditions

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Maximum cut-off diamter
Coated grade Material Operation type Cutting speed (SFM) Feed (IPR) CTP type CTPA type
ST4 Stainless Cut off 100 - 230 .0008 - .002 φ.472" φ.630"
DM4 Difficult-to-cut / titanium alloy / hardened material / high temp alloys 100 - 230 .0008 - .0025 
Alloy steel / carbon steel / general purpose  100 - 300   .0016 - .005

Cutting performance

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[ Cutting conditions ]
Material : 304SS  φ.315"  270 SFM  WET
[ Tools used ]
Holder : CTPR12  Insert : DM4CTP15FRN-CX

Case study

Material :
Cutting speed :
270 SFM
Feed :
.002 IPR
Coolant :
CX chipbreaker

5,000pcs / corner

Competitor's wiper insert

2,000pcs / corner

Competitor's insert edge chipped resulting in a rough machined surface.
The CX insert maintained a good cutting edge resulting in stable machining, smooth machined surface, and long tool life.

Material :
Cutting speed :
330 SFM
Feed :
.002 IPR
Coolant :
CX chipbreaker

3,500pcs / corner

Competitor's molded chipbreaker
(PVD coated carbide)

2,000pcs / corner

The CX chipbreaker achieved stable machining and controlled the chip and evacuated it away from the part.
The ST4 grade is best for stainless steel materials which extended tool life by 1.5 times compared to the competitor's insert.

Tool lineup