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NTK Cutting Tools

SCRUM DUO

For grooving｜ Swiss CNC lathes / Conventional CNC lathes

Highly rigid holder design
Home / Grooving & Parting / SCRUM DUO

Stable grooving with unique holder design

Insert securely held to achieve excellent machined surfaces
Features
  • Insert widths range from 3.0mm – 6.0mm .118 – .236 of an inch
  • Two 3D chipbreaker styles to choose from
    GW: Sharpness, excellent chip control, best for side turning
    GV: Superior sharpness for less tool pressure to prevent chattering and results in good surface finish
Tooling application

Swiss CNC lathes
Grooving and Side turning

Tool rigidity comparison
Grooving
[ Cutting conditions ] Material : SCM415  Groove width 5.0mm  vc=150m/min  f=0.1mm/rev  ap=7.0mm .0197 inch  500 SFM  .004 IPR  .275DOC   Non-step grooving  WET
[ Tools used ] Insert : DM4 GWPG500N04F-GW  Holder : GTWPR2525M-5F10
Milling Inconel
[ Cutting conditions ] Material : SCM415  Groove width 5.0mm  vc=150m/min  f=0.1mm/rev  ap=1.0mm .0197 inch 500 SFM .004 IPR .039DOC   Non-step grooving WET
[ Tools used ] Insert : DM4 GWPG500N04F-GW  Holder : GTWPR2525M-5F10
Two chipbreaker styles combined with our tough DM4 carbide grade for long tool life and quality surface finishes

GW chipbreaker
A versatile design with edge sharpness and chip control features.
Multi-functional for grooving and side turning

GV chipbreaker
Features superior sharpness with high rake face Ideal for applications requiring low tool pressure

Chip comparison (grooving)

[ Cutting conditions ]
Vc=80m/min  f=0.08mm/rev  Groove width : 5mm 270 SFM f=.003 IPR Groove width : .197 inch   WET

Tool pressure comparison (grooving)

[ Cutting conditions ]
Vc=80m/min  f=0.08mm/rev  Groove width : 5mm 270 SFM f=.003 IPR Groove width : .197 inch   WET
- - - Scroll the table - - -
Coated grade Material Operation type Cutting speed (m/min) Cutting speed (SFM) Groove width (mm) Groove width (inch) Grooving feed rate(mm/rev) Grooving feed rate(IPR) Side turning feed(mm/rev) Side turning feed(IPR) ※ GW chipbreaker only
DM4 Difficult-to-cut material / titanium alloy / Alloy steel / carbon steel / hardened material / general purpose / high temp alloys Grooving 30 – 180 75 – 600 3.0 – 4.0 .118 – .157 0.05 – 0.12 .002 – .006 0.03 – 0.10 .001 – .004
4.0 – 5.0 .157 – .197 0.08 – 0.15 .004 – .008 0.03 – 0.13 .006 – .012
5.0 – 6.0 .197 – .236 0.12 – 0.16 .006 – .012 0.03 – 0.13 …
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For more information about this product, visit our online e-catalog, or download the catalog/product report

eCatalog (mm)
eCatalog (in)
For grooving
For face grooving
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