CBN
S INTERED A LLOY
Balance of Cutting Edge Sharpness and Fracture Resistance, Ideal for Finishing of Sintered Alloy
Application Range
D High-density/Sintered Alloy (30 to 65HRC/300 to 800HV)
D Sintered Alloy (50 to 95HRB/90 to 200HV)
Finishing region
Roughing region
Finishing region
Roughing region
,
1,000
1,000
n
660
660
BN7115
BN7000
BN7115 BN7500
BN7500
BN7000
330
330
,
n
n
0
.004 .008 .012 .016 .020 .0118 .008 .006 .010 .004 .002
0
Depth of Cut a p (inch) Feed Rate f (IPR)
Depth of Cut a p (inch) Feed Rate f (IPR)
.004 .008 .012 .016 .020 .012 .008 .006 .010 .004 .002
Cutting Performance
D Continuous Cutting (Surface Roughness)
D Continuous Cutting (Wear Resistance)
Sintered Alloy
Sintered Alloy
Insert : 3NUTNGA331HS-BN7115 Cutting Conditions: v c = 600 SFM f = .004 IPR a p = .008” Wet Conventional CBN .008
Insert : 3NUTN Cutting Cond Wet
Conventional CBN
1.0
0.8
BN7115
.006
50μm
D
BN7115
0.6
D
Conventional CBN
Insert : 3NUTNGA331HS-BN7115 Cutting Conditions: v c = 600 SFM f = .004 IPR a p = .008” Wet .004 D D
Insert : 3NUTNGA331US Cutting Conditions: v c Wet
D
0.4
D
D
Wear Resistance 1.5 x
Surface Roughness Tool Life 1.4 x
,
D
.002
0.2
n
n
0 D
50μm
0
3,280
6,560
9,840
13,125
16,400
3,280
6,560
9,840
13,125
16,400
BN7115 Sharp Cutting Edge
Cutting Distance (Feet) Part Material: Sintered Ferrous Alloy F-08C2 equivalent (150HV) Insert: 2NU-CNGA432 Cutting Conditions: v c = 660 SFM, f = .004 IPR, a p = .008” Wet
, Cutting Distance (Feet) Part Material: Sintered Ferrous Alloy F-08C2 equivalent (150HV) Insert: 2NU-CNGA432 Cutting Conditions: v c = 660 SFM, f = .004 IPR, a p = .008” Wet n
n
Sumitomo’ s proprietary sintering process and special binder increase binding strength between CBN particles and improves CBN particle/binder boundary strength. These improvements help maintain edge sharpness which in turn reduces burrs and tearing.
D Interrupted Cutting (Fracture Resistance)
Sintered Alloy
No Chipping
BN7115
Conventional Tool
BN7115
BN7115 Able to Continue
Recommended Cutting Conditions Recommended Cutting Conditions Insert : 2NUCNGA431US-BN7115 Cutting Conditions: v c = 560 SFM f = .003 IPR a p = .004” Wet Insert : 2NUCNGA431US-BN7115 Cutting Conditions: v c = 560 SFM f = .003 IPR a p = .004” Wet Cutting Edge Dulled D Sintered Alloy High Edge Sharpness
Insert : 2NUCNGA432LF Cutting Conditions: v c = Wet Insert : 2NUCN Cutting Cond Wet
Conventional CBN
Chipping
Chipping
Cu BN711
Conventional CBN Chipping
Comparison of CBN Particles' Binding Strength (binder removed for comparison)
Cutting E BN7115
Part Material: Sintered Ferrous Alloy FLA-07C2M equivalent (500HV) Insert: 2NU-CNGA432 Cutting Conditions: v c = 575 SFM, f = .0035 IPR, a p = .006” Dry No. of Workpieces (Times) 0 20 40 60 80 100
D Sintered Alloy
Recommended Cutting Conditions Cutting Speed v c (SFM) Feed Rate f (IPR)
Burr C LF Ty No R Honing
Min. - Optimum - Max.
Work Material Work Material General Sintered Alloy High-density Sintered Alloy General Sint red Alloy High-density Sintered Alloy
Grade
Recommended Cutting Conditions Cutting Speed v c (SFM) Feed Rate f (IPR)
LF Depth of Cut a p (Inch)
Min. - Optimum - Max.
Type
Grade
Depth of Cut a p (Inch)
No R Honing LE
- - - - .0059 .0118 .0047 .0118 .0031 . 9 - - - - .0024 .0059
BN7115 BN7000 BN7115 BN7000
- - - - 500 50 330 330
.005 .010 .004 .010
500 500 330 330 - - - -
- - - -
.010 .020 .008 .020 - - - -
- - - -
.002 .002 .002 .002 - - - -
30 30 30 30
.0004 .0004 .0004 .0004 1,000 1, 00 660 660
- - - - .002 .002 .002 .002
.010 .020 .008 .020
Type
- - - - .0004 .0004 .0004 .0004 .0031 .0059 .0024 .0059
- - - - .0059 .0118 .0047 .0118
R Honing
BN7115 BN7000 BN7115 BN7000
.005 .010 .004 .010
- - - -
LS Typ R Honing
30 30 30 30
1,000 1,000
S
660 660
Good Rou
2
Good Surface Roughness
Break Em
Breakage Control Emphasised
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