Sumitomo General Catalog 2025-2026

Boring Bars A-MTFN / S-DTFN

Steel Coolant Hole

91°

Boring bar / Proling A-MTFN

Fig 1

LH

Figure shows right-hand (R) tool.

-6º

LF

-11º

E

Holder

Parts 

Dimensions (inch)

Clamp Screw

Lock Pin

Min. Bore Dia.

Cutting Edge Height

Cutting Edge Distance

Stock

Applicable Insert

Shim

Wrench Wrench Clamp

Rake Angle

Overall Length

Diameter Height

Head

Cat. No.

Fig

Ref. Page

R L

Cat. No.

N m

C

DMIN DCON H HF LF WF LH GAMF

(For Hex Socket)(For Hex Socket)

A16TMTFN R/L 3   1.280 1.000 0.900 0.450 12.00 0.640 2.500 -11° A20UMTFN R/L 3   1.530 1.250 1.480 0.590 14.00 0.765 3.000 -11° A24UMTFN R/L 4   1.780 1.500 1.370 0.685 14.00 0.890 3.000 -11° A28UMTFN R/L 4   2.030 1.750 1.630 0.815 14.00 1.015 4.000 -11° A32VMTFN R/L 4   2.562 2.00 1.870 0.935 16.00 1.281 4.000 -11°

1

— NL33L LH1/8 LH5/64

XNS47 XNS48

TN □□ 33 □ B52

3.0

CL20

1 ITSN323 NL34L LH1/8 LH5/64

1 1 1

LH1/8

TN □□ 43 □ B56

3.0 ITSN433 NL46

LH030 CL20 XNS48

D

LH1/8

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

R

Medium Diameter General-purpose Double Clamp

S

Steel

91°

S-DTFN Stop Boring

Fig 1

Fig 2

DCON

DMIN Min. Bore Dia.

DCON

DMIN Min. Bore Dia.

91°

91°

T

H

H

LF

LF

-10 °

-10 °

-6°

-6°

V

LHD

Figure shows right-hand (R) tool.

Holder

Parts

Dimensions ( mm )

W

Shim Screw

Applicable Insert

Upper Surface Wrench

Lower Surface Wrench

Cutting Edge Distance

Stock Min. Bore Dia.

Clamp Set

Shim

Overall Length

Diameter Height

Head

Cat. No.

Fig

R L

Cat. No.

N m

DMIN DCON H LF WF LHD

(For Hex Socket) (For Hex Socket)

Steel S32S-DTFN R/L 1604-40   40 32 30 250 22.0 26 S40T-DTFN R/L 1604-50   50 40 37 300 27.0 26 S50U-DTFN R/L 1604-63   63 50 47 350 31.5 —

TNS1603B

1 1 2

TN □□ 33 □ B52

BFTX0307N LH040 LH025

SCP-1 5.0

TNS1604B

Right-handed (R) tool holders are compatible with left-handed (L) or neutral (N) inserts. Left-handed (L) tool holders are compatible with right-handed (R) or neutral (N) inserts.

C3

Clamp Set Parts

 Worldwide Warehouse Item

E23

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