Selection Guide

External grooving

5 Narrow part extension chart 30 4

GNDL

Expanded 3 20

GNDLS GNDM

Expanded

GWC/GWCSGNDMGNDMGNDL
dedanded
ExpanExp
2For small latheFor small latheFor small latheGNDMS

10 GNDS 1 SGE GWC/GWC/

5 GWB

GWCSGWCS

For hardened steel

0 1 2 3 4 5 0 1 2 3 4 5 6 7 8 9 10

width (mm) width (mm)

  • External Grooving Tools

* mark: For groove depth and width combinations, see the chart above or the relevant page.

Structure

Depth*10203040 (mm)
ShapeInsert shape
TypeCharacteristics

( ): Number of corners Width*

2 4 6 8 10(mm)

F GWC High rigidity double clamp

5.0 (Inserts for MINI Tool holders are screwed on.)

  • 3-cornered insert
4.8
F40.33Inserts with breakers stocked

GWCS 5.0 (3) L-styled (horizontal) GWC type holder

  • 4.8
F5(standard, with chipbreaker)0.33
GWB
5.0High rigidity double clamp
Grooving
(1)Suitable for intermittent machining of hardened

Traverse 1.5 6.0 steel with coated SUMIBORON

Cut-OffFor hardened steel→F41
machining possible
ThreadingSGE
8.0Traverse machining (groove widening) is

Traverse (2) possible

machining possible 3.0 6.0

F30 GNDS Suppresses chatter with its high rigidity design. 10.0

  • Short tool overhang enables highly efficient

2.0 6.0 grooving and traverse machining.

F24 GNDM 12.0 Suppresses chatter with its high rigidity design. Small tool

(2) 16mm square shanks are available

1.253.0
ExpandedF22
GNDM(2)18.0
Suppresses chatter with its high rigidity design.
Traverse・ Best suited for traverse machining and copying

anded 1.25 8.0

Exp →F26 machining possible

GNDMS 23.0

  • L-styled (horizontal) GNDM type holder

3.0 6.0

F26 GNDL 16.0 Suppresses chatter with its high rigidity design. Small tool

10, 12, 16mm square shanks are available

1.253.0
andedF22
Exp
GNDL(2)・ Suppresses chatter with its high rigidity design.
25.0
Best suited for grooving, deep grooving and
Expandedcut-off applications

1.25 8.0

F28 (2) GNDLS 25.0

  • L-styled (horizontal) GNDM type holder

2.0 6.0

F28 You can use the SUMIBORON grooving tool BNGG type (→F42) for hardened steel.

  • Necking Tools

Structure Depth* 10 20 30 (mm)

TypeShapeInsert shapeWork dia.
Characteristics
( ): Number of cornersWidth*2468(mm)(mm)
GNDN
4.0From
Undercutting on corners possible
(2)2.06.0ø20

→F31