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 .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

Cutting conditions

Scroll the table →

Coated grade Material Operation type Cutting speed (SFM) Feed IPR) DOC (inch)
ST4 Stainless OD Turning continuous 150 - 400 .0008 - .004 .020 - .118
QM3 Alloy steel / carbon steel / hardened material 150 - 500
DM4 Difficult-to-cut material / titanium alloy / high temp alloys 75 - 330
TM4 Non-ferrous / aluminum / plastic / general purpose 150 - 600

Cost reductions for Swiss machining

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

Chip formation comparison

[ Cutting conditions ]
Material : 304SS  270 SFM   WET

Case study

Electronic component
Material :
Cutting speed :
530 SFM
Feed :
.006 IPR
.031 inch
Coolant :
ST4+ UL chipbreaker

1000pcs / corner

Competitor's molded chipbreaker
(PVD coated carbide)

200pcs / 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 :
600 SFM
Feed :
.004 IPR
.0120 inch
Coolant :
TM4+ UL chipbreaker

800pcs / corner

Competitor's wiper insert
(PVD coated carbide)

400pcs / 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

Please check product catalog for tooling lineup