ULchipbreakerFor front turning operations | Swiss CNC Lathes

Negative insert developed for Swiss lathes

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.

Product video


  • Depth of cut ranges from 0.5 to 2.5 mm
  • 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

Cutting conditions

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Coated grade Material Operation type Cutting speed (m/min) Feed (mm/rev) DOC (mm)
ST4 Stainless OD Turning continuous 50 - 120 0.03 - 0.15 0.3 - 2.5
QM3 Alloy steel / carbon steel / hardened material
DM4 Difficult-to-cut material / titanium alloy 30 - 100
TM4 Non-ferrous / aluminum / plastic / general purpose 50 - 180

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   WET

Case study

Electronic component
Material :
Cutting speed :
160 m/min
Feed :
0.15 mm/rev
0.8 mm
Coolant :
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 :
Cutting speed :
180 m/min
Feed :
0.1 mm/rev
0.5 mm
Coolant :
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

Tool lineup

View Catalog Information

Please check product catalog for tooling lineup