Sumitomo General Catalog 2025-2026

Boring Bars A-MDQN / A-MDUN

Medium Diameter General-purpose Double Clamp

Steel Coolant Hole

95°

12°30' Multi-Purpose Boring A-MDQN

DMIN Min. Bore Dia.

H

17°30'

DCON

E

WF

1/4-18 NPT

LF

55°

17°30'

GAMF

10°

Holder

Parts  Applicable Insert

Dimensions (inch)

C

Shim Screw

Lock Pin

Clamp Screw

Min. Bore Dia.

Stock

Shim

Wrench Wrench Clamp

Rake Angle

Cutting Edge Height

Overall Length

Cutting Edge Distance

Diameter Height

Head

Cat. No.

Fig

Ref. Page

R L

Cat. No.

N m

DMIN DCON H HF LF WF LH GAMF

D

(For Hex Socket) (For Hex Socket)

Inch A24U-MDQN R/L 4 l l 2.250 1.500 1.500

— -10° DN □□ 43 B32 1 IDSN432 — NL46 LH3/32 LH030 CL20 XNS48

— 14.000 1.125

Wrench for shim is sold separately from the main body. Coolant Through

R

Medium Diameter General-purpose Double Clamp

Steel Coolant Hole

S

95°

Boring bar / Proling Fig 1 A-MDUN

Fig 2

T

LH

LH

Figure shows right-hand (R) tool.

-6º

-7º

30º

LF

LF

V

-12º

-10º

Holder

Parts 

Dimensions (inch)

Lock Pin

Clamp Screw

Min. Bore Dia.

Cutting Edge Distance

Cutting Edge Height

Wrench Wrench Clamp

Stock

Applicable Insert

Shim

Overall Length

Rake Angle

Diameter Height

Head

W

Cat. No.

Fig

Ref. Page

R L

Cat. No.

N m

DMIN DCON H HF LF WF LH GAMF

(For Hex Socket) (For Hex Socket)

A16TMDUN R/L 4 l l 1.750 1.000 0.900 0.450 12.00 0.875 2.500 -12° A20UMDUN R/L 4 l l 2.000 1.250 1.180 0.590 14.00 1.000 3.000 -12° A24UMDUN R/L 4 l l 2.250 1.500 1.370 0.685 14.00 1.125 3.000 -12° A32VMDUN R/L 4 l l 3.000 2.000 1.870 0.935 16.00 1.375 4.000 -12°

XNS47

NL44 LH1/8 LH3/32

2 1 1

CL20

LH1/8 LH3/32 LH1/8 LH3/32

DN □□ 43 B32

3.0

IDSN433 NL46

2 IDSN433 NL46 LH1/8 LH3/32 CL20 XNS48

Wrench for shim is sold separately from the main body. Coolant Through

• USA Stocked Item

E15

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