SUMIBORON Small Hole Boring Bars BNB Type
● High rigidity full cemented carbide boring bar shank ● Minimal deformation produces boring with excellent dimensional tolerance. ● Minimal chatter produces superior surface finish. ● Full-top CBN - SUMIBORON insert enables 3 cutting edges ● Can be used with PCD - SUMIDIA inserts for non-ferrous metal machining ● Now with economical single-corner NF Type PCD - SUMIDIA insert
SUMIBORON Clamp-on
PCD
92˚
L
BNB Internal Turning and Facing
Fig 1
DMIN Min. Bore Dia.
DCON
2°
H
LF
GAMF
Figure shows right-hand (R) tool.
Holder
Parts
Dimensions (inch/ mm )
Clamp Bolt
Nut
Wrench
Overall Length
Rake Angle
Min. Bore Dia.
Diameter
Height
Cat. No.
Fig
DMIN
DCON
H
LF
GAMF
(For Hex Socket)
BNB508R BNB510R BNB512R BNB516R BNB520R
0.394" ( 10.0) 0.472" ( 12.0) 0.551" ( 14.0) 0.708" ( 18.0) 0.866" ( 22.0)
BH0306 BNBW-2
0.315" (8.0) 0.276" ( 7.0) 5.512" (140) 0.394" (10.0) 0.354" ( 9.0) 5.512" (140) 0.472" (12.0) 0.433" ( 11.0) 6.299" (160) 0.630" (16.0) 0.551" ( 14.0) 7.086" (180) 0.787" (20.0) 0.708" ( 18.0) 7.086" (180)
-9° -8° -6° -5° -4°
1 1 1 1 1
FBUP3-A0-9 BNBW-4
TH020
BNBC
BH0310 BNBW-7
Insert (
CBN - SUMIBORON,
PCD - SUMIDIA)
Dimensions ( mm )
CBN - SUMIBORON PCD - SUMIDIA
Nose Radius
Cat. No.
RE
Fig 1
60°
1.59
TBGN060102B TBGN060104B TBGN060108B
0.2 0.4 0.8 0.2 0.4 0.8 0.2
ø3.97
5°
TBGN060102-BSTN * TBGN060104-BSTN * TBGN060108-BSTN * NF-TBGN060102 ** NF-TBGN060104 **
- - -
- - - - - - - - - - - - - - - - - -
5°
- - - - - - - - - - - - - -
0.4 * TBGN ○○○○○○ -BSTN is only available in BNX20 grade and has a smaller negative land angle. (BSTN: -15°, B: -25°. However, the negative land angle is uniquely configured for each grade.) ** NF-TBGN is a single corner insert. (This is not a Full-Top insert)
Performance
30
30
Interrupted (SCM415) Continuous (SKD61)
Stable Cutting Range
Stable Cutting Range
Steel Shank Carbide Shank
●
20 40 60 80 100 120 BNB508R BNB512R BNB516R BNB520R ● ● ● ● ● ●
●
●
20
20
●
BNB525R
●
●
BNB520R
10
10
BNB516R
Region where chatter occurs
Region where chatter occurs
BNB512R
0 20 40 60 80 100 120 140
0
Tool Overhang L (mm)
Tool Overhang L (mm)
DCON
DCON
L
L
Work Material: SCM415 (61HRC) Internal Diameter ø45 ( 6U Groove ) Insert Cat. No.: TBGN060104B Cutting Conditions: v c =100m/min, f =0.1mm/rev, a p =0.2mm
Work Material: SKD61 (60HRC) Insert Cat. No.: TBGN060104B Cutting Conditions: v c =100m/min, f =0.1mm/rev, a p =0.2mm
L118
• USA Stocked Item Worldwide Warehouse Item ▲ USA Limited Availability Item
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