Sumitomo General Catalog 2025-2026

Grooving Tools GNDM

External Multi-Purpose GND (Grooving, Turning, Profiling)

* For traverse cutting (groove expansion), use a multifunctional insert for profiling.

External

External Grooving GNDM

Fig 1

CDX

LF

LH

*

F

Figure shows right hand (R) tool.

Holder

Parts Dimensions (inch / mm )

Cutting Edge Distance

Cutting Edge Height

Max. Groove Depth Applicable Insert

Stock Height Width Overall Length

Cap Screw Wrench

Head

Seat Size

BX0520

Cat. No.

Fig

R L

N m

H BLFWF HFLH

CDX

BX0620

GNDM R/L 122K-050 GNDM R/L 123K-050 GNDM R/L 124K-070 GNDM R/L 125K-070 GNDM R/L 126K-070 GNDM R/L 162M-050 GNDM R/L 163M-050 GNDM R/L 164M-070 GNDM R/L 165M-070 GNDM R/L 166M-070 GNDM R/L 168M-070 GNDM R/L 203P-050 GNDM R/L 204P-070 GNDM R/L 205P-070 GNDM R/L 206P-070 GNDM R/L 207P-070 GNDM R/L 208P-070

.500 GC □□ 20 ○○ - □□ 1 .500 GC □□ 3 ○○○ - □□ 1 .700 GC □□ 40 ○○ - □□ 1 .700 GC □ N5 ○○○ - □□ 1 .700 GC □ N6 ○○○ - □□ 1 .500 GC □□ 20 ○○ - □□ 1 .500 GC □□ 3 ○○○ - □□ 1 .700 GC □□ 40 ○○ - □□ 1 .700 GC □ N5 ○○○ - □□ 1 .700 GC □ N6 ○○○ - □□ 1 .700 GCMN80 ○○ - □□ 1 .500 GC □□ 3 ○○○ - □□ 1 .700 GC □□ 40 ○○ - □□ 1 .700 GC □ N5 ○○○ - □□ 1 .700 GC □ N6 ○○○ - □□ 1 .700 GCMN70 ○○ - □□ 1 .700 GCMN80 ○○ - □□ 1 10 GCMN125005-GF 1 10 GCMN150005-GF 1 10 GC □□ 20 ○○ - □□ 1 12 GC □□ 3 ○○○ - □□ 1 18 GC □□ 40 ○○ - □□ 1 18 GC □ N5 ○○○ - □□ 1 18 GC □ N6 ○○○ - □□ 1 10 GCMN125005-GF 1 10 GCMN150005-GF 1 10 GC □□ 20 ○○ - □□ 1 12 GC □□ 3 ○○○ - □□ 1 18 GC □□ 40 ○○ - □□ 1 18 GC □ N5 ○○○ - □□ 1 18 GC □ N6 ○○○ - □□ 1 12 GC □□ 3 ○○○ - □□ 1 18 GC □□ 40 ○○ - □□ 1 18 GC □ N5 ○○○ - □□ 1 18 GC □ N6 ○○○ - □□ 1 18 GCMN70 ○○ - □□ 1 18 GCMN80 ○○ - □□ 1 12 GC □□ 3 ○○○ - □□ 1 18 GC □□ 40 ○○ - □□ 1 18 GC □ N5 ○○○ - □□ 1 18 GC □ N6 ○○○ - □□ 1 18 GCMN70 ○○ - □□ 1 18 GCMN80 ○○ - □□ 1

● ● .750 .750 5.000 .750 .750 1.441 2 ● ● .750 .750 5.000 .750 .750 1.441 3 ● ● .750 .750 5.000 .750 .750 1.772 4 ● ● .750 .750 5.000 .750 .750 1.772 5 ● ● .750 .750 5.000 .750 .750 1.772 6 ● ● 1.000 1.000 6.000 1.000 1.000 1.441 2 ● ● 1.000 1.000 6.000 1.000 1.000 1.441 3 ● ● 1.000 1.000 6.000 1.000 1.000 1.772 4 ● ● 1.000 1.000 6.000 1.000 1.000 1.772 5 ● ● 1.000 1.000 6.000 1.000 1.000 1.772 6 ● ● 1.000 1.000 6.000 1.000 1.000 1.772 8 ● ● 1.250 1.250 7.000 1.250 1.250 1.441 3 ● ● 1.250 1.250 7.000 1.250 1.250 1.772 4 ● ● 1.250 1.250 7.000 1.250 1.250 1.772 5 ● ● 1.250 1.250 7.000 1.250 1.250 1.772 6 ● ● 1.250 1.250 7.000 1.250 1.250 2.000 7 ● ● 1.250 1.250 7.000 1.250 1.250 2.000 8

BX0520 5.0 LH040

BX0520 5.0 LH040

BX0620 6.0 LH050

GNDM R/L 2020K-1.2510  GNDM R/L 2020K-1.510  GNDM R/L 2020K-210  GNDM R/L 2020K-312  GNDM R/L 2020K-418  GNDM R/L 2020K-518  GNDM R/L 2020K-618  GNDM R/L 2525M-1.2510  GNDM R/L 2525M-1.510  GNDM R/L 2525M-210  GNDM R/L 2525M-312  GNDM R/L 2525M-418  GNDM R/L 2525M-518  GNDM R/L 2525M-618 

20 34.0 1.25 20 34.0 1.5

20 20 125 20 20 20 125 20 20 20 125 20 20 20 125 20 20 20 125 20 20 20 125 20 20 20 125 20 25 25 150 25 25 25 150 25 25 25 150 25 25 25 150 25 25 25 150 25 25 25 150 25 25 25 150 25 32 25 170 25 32 25 170 25 32 25 170 25 32 25 170 25 32 25 170 25 32 25 170 25 32 32 170 32 32 32 170 32 32 32 170 32 32 32 170 32 32 32 170 32 32 32 170 32

2 3 4 5 6

20 33.6 20 36.6 20 45.0 20 45.0 20 45.0

BX0520 5.0 LH040

25 36.0 1.25 25 36.0 1.5

2 3 4 5 6 3 4 5 6 7 8 3 4 5 6 7 8

25 33.6 25 36.6 25 45.0 25 45.0 25 45.0 32 36.6 32 45.0 32 45.0 32 45.0 32 50.0 32 50.0 32 36.6 32 45.0 32 45.0 32 45.0 32 50.0 32 50.0

BX0520 5.0 LH040

GNDM R/L 3225P-312 GNDM R/L 3225P-418 GNDM R/L 3225P-518 GNDM R/L 3225P-618 GNDM R/L 3225P-718 GNDM R/L 3225P-818

BX0520 5.0 LH040

BX0620 6.0 LH050

GNDM R/L 3232P-312  GNDM R/L 3232P-418  GNDM R/L 3232P-518  GNDM R/L 3232P-618  GNDM R/L 3232P-718  GNDM R/L 3232P-818 

BX0620 6.0 LH050

Combine the insert with a holder such that the Seat Size matches. Refer to page F21 & F22 for applicable inserts See GNDM-JX (holders for small lathes) on page F23)

 : Worldwide Warehouse Item ●: USA Stocked Item

N m Recommended Tightening Torque (N·m)

F14 & F15

Recommended Cutting Conditions

F25

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