NTK Cutting Tools

UL Chipbreaker

For front turning operations | Swiss CNC Lathes

Negative insert developed for Swiss lathes
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Designed with the sharpness and low tool pressure of a positive insert while reducing insert costs

Outstanding performance even machining small diameter parts while increasing corners per insert.
Features
  • Depth of cut ranges from 0.5 to 2.5 mm .020 to .118 inches
  • Equivalent sharpness of a positive insert in a negative geometry
  • 6-corner insert delivers significant cost reductions
Tooling application

Swiss CNC Lathe front turning operations

UL chip control range
Cost reductions for Swiss machining​

Achieves performance comparable to a positive insert with the benefit of additional corners

Chip formation comparison​
[ Cutting conditions ] Material : SUS304  vc=80m/min 304SS  270 SFM   WET
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Coated grade Material Operation type Cutting speed (m/min) Cutting speed (SFM) Feed (mm/rev) Feed (IPR) DOC (mm) DOC (inch)
ST4 Stainless OD Turning continuous 50 – 120 150 – 400 0.03 – 0.15 .0008 – .004 0.3 – 2.5 .020 – .118
QM3 Alloy steel / carbon steel / hardened material
DM4 Difficult-to-cut material / titanium alloy / high temp alloys 30 – 100 75 – 330
TM4 Non-ferrous / aluminum / plastic / general purpose 50 – 180 150 – 600
Electronic component
Material :
SUS304 304SS
Cutting speed :
160 m/min 530 SFM
Feed :
0.15 mm/rev .006 IPR
DOC :
0.8 mm .031 inch
Coolant :
WET
ST4+ UL chipbreaker
1000 pcs / corner
Competitor’s molded chipbreaker (PVD coated carbide)
200 pcs / corner

UL insert obtained good machined surface with its sharp cutting edge.
UL combined with the ST4 grade, for stainless steel machining, achieved 4 x longer tool life compared to the competition.

Auto parts
Material :
SS400
Cutting speed :
180 m/min 600 SFM
Feed :
0.1 mm/rev .004 IPR
DOC :
0.5 mm .0120 inch
Coolant :
WET
TM4+ UL chipbreaker
800 pcs / corner
Competitor’s wiper insert (PVD coated carbide)
400 pcs / corner

UL sharpness provided stable dimensional results and reduced tool pressure
When cutting speed increased, BUE was eliminated further increasing tool life from 600 to 800 pieces /corner

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