Keeping the Customer First
Tungaloy Report No. 406-E

Shallow grooving inserts

GTGN type
Newly developed grooving insert with 3 edges

NEWGTGN typeNew inserts offer high performance andeconomical advantages

Features
Suitable for highly precise grooving
Accurate ground inserts with sharp edge and excellent chip control
Highly recommended for accurate grooving such as circlip grooving.
Combining with the SH730 grade, the new range demonstrates high sharpness andstability for long tool life
Groove width W: 1.0 ~ 2.25 mm, tolerance: ±0.03 mm
Groove depth T: 1.25 ~ 1.8 mm

Economical advantages
䊉 Lay-down insert with 3 cutting edges

31䊉 Can be used with a number of toolholders

to reduce inventory

By just changing the shim, toolholders for
TungThread can be used for GTGN inserts.

2G16ER/IL-DT, G16EL/IR-DT
G16ER/IL-S, G16EL/IR-S

Toolholder applicable forboth GTGN and TungThreadby just changing the shim.

Shim for TungThread

Shim for GTGN insert

Note: GTGN insert can’t be used on specific toolholders that don’t need shim.
Shim for GTGN insert can’t be applied to competitors’ toolholders.

Standard cutting conditions
Work materials

GradesSteels
S45C, SCM440 etc. (C45, 42CrMo4 etc.)
Stainless steels
SUS304, SUS316 etc.
(X5CrNi18-9, X5CrNiMo17-12-2 etc.)

Heat-resistant alloys, Titanium alloys etc.
(Ti-6Al-4V etc.)
2SH730Cutting speed
Vc (m/min)Feedf (mm/rev)

50 - 150

0.05 - 0.10

30 - 150

0.05 - 0.10

30 - 100

0.05 - 0.10

Cutting performanceFeedf (mm/rev)
Workmaterials

0.05

0.075

0.1

GTGN demonstrates
remarkable chip control whencutting various types of workmaterial.

S45CC45Insert
Toolhoder
ShimCutting speed
Groove widthCoolant

SCM415
15CrMo4: GTGN-16ER/IL140: CER2525M16DT: G16ER/IL-DT: Vc = 100 m/min: W = 1.4 mm: Wet

SUS304XSCrNi18-9

GradeSH730

PVD coated grade
Delivers a stable performance with thecombination of exclusive (Ti, Al)N coating andextremely tough substrate.

(Ti,Al)N PVD coating

Excellent chipping and welding resistanceThin (Ti, Al)N coated layers are tightly adhered to create asharp cutting edge.

Micro grain carbide
substrate

Improved plastic deformation resistanceand toughness
GradeApplication
Application code

Substrate

Coating layer

Specific Hardness
gravity(HRA)

T.R.S.
(GPa)

Main
Thickness
Composition
(µm)

14.4

3.0

Flash coating(Ti, Al)N base

1

SH730
Steel

91.5

P20 - P35

SH730
Stainless

91.5

3.0

Flash coating(Ti, Al)N base

1

14.4

91.5

3.0

Flash coating(Ti, Al)N base

1

SH730
Superalloys

S20 - S35

For steel and stainless steel(Thin PVD)

14.4

M20 - M35

FeaturesExcels in cutting edge
sharpness and wear
resistance.

3InsertCWTrεød

ER/IL shown

Insertsize

1616Groovewidth
W ± 0.03(mm)Dimensions (mm)GradeCat. No.

Max. groove
depthShim

Center of Dual method clamp
widthtype; Screw-on/C
Clamp-on

1.00

GTGN-16ER/IL100

Coated
SH730
䊉

1.20

GTGN-16ER/IL120

1.40

GTGN-16ER/IL140

1.70

GTGN-16ER/IL170

䊉

1.95

GTGN-16ER/IL195

䊉

1.70

3.75

2.25

GTGN-16ER/IL225

䊉

1.80

3.60

1.00

GTGN-16EL/IR100

䊉

1.25

4.22

1.20

GTGN-16EL/IR120

䊉

1.30

4.12

1.40

GTGN-16EL/IR140

䊉

1.70

GTGN-16EL/IR170

䊉

1.95

GTGN-16EL/IR195

䊉

1.70

3.75

2.25

GTGN-16EL/IR225

䊉

1.80

3.60

ød

Trε

1.25

4.22

䊉

1.30

4.12

䊉

1.50

9.525

9.525

1.70

1.50
1.70

0.1

0.1

4.02
3.87

4.02
3.87

Clamp-on type

G16ER/IL-DT

G16ER/IL-S

G16EL/IR-DT

G16EL/IR-S

Packing quantity = 10 pcs

Note: GTGN insert is applicable for both external and internal grooving, but
the hand of tool is opposite in external and internal machining. Shimfor GTGN is exclusive to each type of toolholders

Shim
Cat. No.

Type

G16ER/IL-DT
G16EL/IR-DT

Screw-onClamp-on

G16ER/IL-S
Clamp-on
G16EL/IR-S

Toolholder
ExternalInternalInsert

CER16DT

TCNL16DT

GTGN-16ER/IL

CEL16DT

TCNR16DT

GTGN-16EL/IR

B-CER16M16
CER3232P16T

CNL16

GTGN-16ER/IL

B-CEL16M16

CNR16

GTGN-16EL/IR

4

External toolholders
CE R/L* When using the GTGN insert, the exclusive shim shownin the table must be used. Exclusive shim should beordered separately.
Dual method clamp type

External grooving
31

MI

32

O

O110°

Right hand (R) shown

Steel shank Screw-on, clamp-on type
Dimensions (mm)Cat. No
CER1212H16DT
CEL1212H16DT
CER1616H16DT
CEL1616H16DT
CER2020K16DT
CEL2020K16DT
CER2525M16DT
CEL2525M16DT

䊉䊉䊉䊉䊉䊉䊉䊉

Shim *hb

L1L2h1f

12121616202025251212161620202525100
100
100
100
125
125150150

242424242424282812121616202025251616202025253232Insert
GTGN-16ER/IL
GTGN-16EL/IRGTGN-16ER/IL
GTGN-16EL/IRGTGN-16ER/IL
GTGN-16EL/IRGTGN-16ER/IL
GTGN-16EL/IR

G16ER/IL-DT
G16EL/IR-DT
G16ER/IL-DT
G16EL/IR-DT
G16ER/IL-DT
G16EL/IR-DT
G16ER/IL-DT
G16EL/IR-DT

Steel shank Clamp-on type
Dimensions (mm)Cat. No
CER3232P16T

B-CE R/L䊉

Shim *hb

L1

L2h1f3232170

323240Insert
GTGN-16ER/IL

G16ER/IL-S

Clamp-on type for gang tooling lathe

External grooving

fb10°

L2

h1

h

L1

Right hand (R) shown

Steel shank Clamp-on type for gang tooling lathe
Dimensions (mm)Cat. No
B-CER16M16
B-CEL16M165䊉䊉

Shim *hb

L1L2h1f

32
32

1616150150

242416162222Insert
GTGN-16ER/IL
GTGN-16EL/IR

G16ER/IL-S
G16EL/IR-S

* When using the GTGN insert, the exclusive shim shownin the table must be used. Exclusive shim should beordered separately.

Internal toolholders
CN R/L

Dual method clamp typeInternal grooving

Carbide reinforcement (for TCNR**)31

θ

ø+sg7O

Mb

ø+mR332

Right hand (R) shown

Tsuppari-Ichiban with carbide reinforcement Screw-on, clamp-on type
Dimensions (mm)
Min.
bore
dia.

Cat. No
TCNR0020R16DT
TCNR0025S16DT

䊉䊉

Shim *L1L2hb

øDm
24 20 14 200
29 25 16.5 250

R330
38

49
64

1823-øDsf

θ

Insert15° GTGN-16EL/IR
15° GTGN-16EL/IR

G16EL/IR-DT
G16EL/IR-DT

Steel shank Clamp-on type
Dimensions (mm)Cat. No
CNR0020P16
CNL0020P16
CNR0025R16
CNL0025R16
CNR0032S16
CNL0032S16

䊉
䊉
䊉
䊉
䊉
䊉

Shim *Min.
boredia.

øDsf

L1

L2R3hb

øDm
2424
29
29
37
37

20
20
25
25
32
32

14
14
16.5
16.5
20.1
20.1

170
170
200
200
250
250

3030
38
38
48
48-1818232330
30

1919242431
31θInsert

15°
15°
15°
15°
15°
15°

GTGN-16EL/IRGTGN-16ER/IL
GTGN-16EL/IRGTGN-16ER/IL
GTGN-16EL/IRGTGN-16ER/IL

G16EL/IR-S
G16ER/IL-S
G16EL/IR-S
G16ER/IL-S
G16EL/IR-S
G16ER/IL-S

Replacement parts
Clamp
set

Shim
screw

Clampingscrew WrenchCat. No

CER/L1212H16DT
CER/L1616H16DT
CER/L2020K16DT
CER/L2525M16DT
CER/L3232P16T
B-CER/L16M16

Clamp
set

Shim
screw

Clampingscrew WrenchCat. No

TCNR/L0020R16DT
DTS5-3.5
CSP16

CSTB-

T-15F

3.5ST

P-3.5-

T-15F

TCNR/L0025S16DT
CNR/L0020P16
CNR/L0025R16-www.tungaloy.co.jp

DTS5-3.5

CSTB3.5ST

T-15F
P-3.5--T-15F

CSP16

CNR/L0032S16

Distributed by:

ISO 9001 certified
ISO 14001 certified
QC00J0056
EC97J1123
Tungaloy Corporation Tungaloy Group
Japan site and Asian
production site
18/10/1996
26/11/1997
Produced from recycled paper

May. 2012 (TJ)