CBN Inserts CBN Insert Edge Specification
■ Edge Treatment Performance
Machining of Hardened Steel
Powdered Metal Machining
LE Type R Honing
LF Type
Powdered Metal
Emphasis on Dimensional Tolerance and Surface Roughness
Burr Control Emphasised
No R Honing
LT Type No R
LE Type R Honing
Suppressed Breakage at High Speeds/High Feeds
Honing LS
LS Type R Honing
Type
R Honing
L
ES Type R Honing
Emphasis on Dimensional Tolerance and Burr Control
Standard No R Honing
Surface Roughness Emphasised
Standard R Honing
Burr Control for Interrupted Cutting
HT Type HS Type R Honing No R Honing
HS Type
Suppressed Breakage with Interrupted Cutting
Breakage Control Emphasised
R Honing
Heavy
Frequency of Interruption
Heavy
Frequency of Interruption
Comparison of Cutting Force with Coated CBN (v c = 330 SFM)
Cutting Force Comparison (Feed Rate: f = .0019 IPR)
Part Material: Alloy
Part Material: Alloy Structural Steel Tool Cat. No. CNGA432 Cutting Conditions: v c = 660 SFM
Structural Steel
60
100 110
BN7000
BN7500
BNC2020
Tool Cat. No. DNGA432 Cutting Conditions:
50
20 10 40 30 60 50 80 70 90
BNC2020 BNC2020
v c = 330 SFM f = .0039 IPR a p = .0039" Dry
40
f =.0019 IPR a p = .0079" Dry
30
BNC2010 BNC2020 BNC300
20
10
Feed Force
Feed Force
0
LE Type LT Type LS Type ES Type Standard HS Type 0
LF Type
LE Type
LS Type Standard HS Type HS Type (S00715) (T01215) (S00525) (S01225)
(
) Sharp Edge Without Honing (
)
Hone Only
(
) Hone Only
Back Force
Back Force
(T00515) (S00515) (S00535) (S01225) (S02735)
Principal Force
Principal Force
Relationship between Cutting Edge Treatment and Machining Quality
Comparison of Cutting Force with Coated CBN (v c = 660 SFM)
Part Material:
Part Material: Powder Metal 90HRB Tool Cat. No.: 3NU-TNGA332 (BN7500)
Low Alloy Steel
100 110
Tool Cat. No.:
BNC2020
Edge Speci cation: LF Type, Standard, HS Type Cutting Conditions: v c = 330, 660, 1,000 SFM f = .0039 IPR a p = .0079” Wet
DNGA432 Cutting Conditions:
20 0 10 40 30 60 50 80 70 90
BNC2020 BNC2020
v c = 660 SFM f = .0039 IPR a p = .0039" Dry
BNC2010
BNC2020 BNC300
Surface Roughness
Good
Feed Force
Small
Burr
LE Type LT Type LS Type ES Type Standard HS Type (T00515) (S00515) (S00535) (S01225) (S02735) ( ) Hone Only
Back Force
Principal Force
LF
Comparison of Cutting Force for Uncoated CBN
Part Material:
Bearing Steel
100 120 140 160 180 200
BN2000
Tool Cat. No.:
CNGA432 Cutting Conditions:
Standard
v c = 660 SFM f = .0039 IPR a p = .0079" Dry
20 40 60 80
HS
Feed Force
0
LT Type
HS Type
Standard
v c = 330 SFM
v c = 660 SFM
v c = 1,000 SFM
Back Force
(T01215)
(S01225)
(S01235)
L29
Principal Force
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