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

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 .275 DOC 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 .039 DOC Non-step grooving WET

[ Tools used ]
Insert : DM4 GWPG500N04F-GW
Holder : GTWPR2525M-5F10

Tool rigidity comparison

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

Lineup (Insert)

GWPG(M)-GW Best for side turning

GWPG-GV Less tool pressure design

Lineup (Toolholder)

GTWP type toolholder

GTWP-K(M) type toolholder / for Grooving

GKWP for horizontal gang style tool post

NQ23-GTWPR

Cutting conditions

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Work material	Grade	v_c (m/min) (SFM)	Groove width (mm) (inch)	Grooving feed rate (mm/rev) (IPR)	Side turning feed (mm/rev) (IPR) ※GW chipbreaker only
Carbon steel Alloy steel Grooving	DM4	30 – 180 100 – 600	3.0 – 4.0 .120 – .160	0.05 – 0.12 .002 – .005	0.03 – 0.10 .001 – .004
			4.0 – 5.0 .160 – .200	0.08 – 0.15 .003 – .006	0.03 – 0.13 .001 – .005
			5.0 – 6.0 .200 – .240	0.12 – 0.16 .005 – .006	0.03 – 0.13 .001 – .005
Difficult-to-cut material Grooving	DM4	30 – 180 100 – 600	3.0 – 4.0 .120 – .160	0.05 – 0.12 .002 – .005	0.03 – 0.10 .001 – .004
			4.0 – 5.0 .160 – .200	0.08 – 0.15 .003 – .006	0.03 – 0.13 .001 – .005
			5.0 – 6.0 .200 – .240	0.12 – 0.16 .005 – .006	0.03 – 0.13 .001 – .005
Titanium alloy High temp alloys Grooving	DM4	30 – 180 100 – 600	3.0 – 4.0 .120 – .160	0.05 – 0.12 .002 – .005	0.03 – 0.10 .001 – .004
			4.0 – 5.0 .160 – .200	0.08 – 0.15 .003 – .006	0.03 – 0.13 .001 – .005
			5.0 – 6.0 .200 – .240	0.12 – 0.16 .005 – .006	0.03 – 0.13 .001 – .005
Hardened material Grooving	DM4	30 – 180 100 – 600	3.0 – 4.0 .120 – .160	0.05 – 0.12 .002 – .005	0.03 – 0.10 .001 – .004
			4.0 – 5.0 .160 – .200	0.08 – 0.15 .003 – .006	0.03 – 0.13 .001 – .005
			5.0 – 6.0 .200 – .240	0.12 – 0.16 .005 – .006	0.03 – 0.13 .001 – .005
General purpose Grooving	DM4	30 – 180 100 – 600	3.0 – 4.0 .120 – .160	0.05 – 0.12 .002 – .005	0.03 – 0.10 .001 – .004
			4.0 – 5.0 .160 – .200	0.08 – 0.15 .003 – .006	0.03 – 0.13 .001 – .005
			5.0 – 6.0 .200 – .240	0.12 – 0.16 .005 – .006	0.03 – 0.13 .001 – .005