By Cutting Conditions Chipbreaker Selection
Roughing
Negative
EHP
EHG
Excellent chip control for heavy cutting PMK N S H ENP
PMK N S H Strongest cutting edge for heavy cutting
PMK N S H Single-sided chipbreaker with low cutting resistance for rough cutting
0.3
22° 0.3 to 0.6
0.4 22°
22°
CNMM54
CNMM54
CNMM54
0°
0°
0°
R
S
C D
R
S
R
S
C D
C D
T
V
W
T
V
W
T
V
W
EHF
EHU
EHW
PMK N S H Heavy cutting chipbreaker with strong cutting edge for excellent chip evacuation in high-feed cutting
PMK N S H Heavy cutting chipbreaker with strong cutting edge for excellent chip control
PMK N S H Two-step breaker with excellent chip evacuation for heavy cutting 0.75 6.3
B
0.2 0.4 4.5
3.2
0.6
0.3
0.25
20°
17°
-15°
-15°
16° -15°
SNMM85
SNMM10
SNMM64
0°
0°
0°
R
S
R
S
C D
C D
R
S
C D
T
V
W
T
V
W
T
V
W
Negative Aluminum Alloy Cutting
(R/L)AX
PMK N S H
Parallel Al chipbreaker with sharp edge
2.5
30°
0°
CNGG43
C
R
S
C D
T
V
W
Negative Hardened Steel Cutting
EGH
Hardened steel breaker reduces cutting resistance and provides good chip evacuation PMK N S H
D
3.5
3°
R
0°
CNGG43
R
S
C D
T
V
W
Chamfering
Negative
S
C
PMK N S H
General-purpose ground breaker
2.15
T
0.15
14°
0°
SNGG43
R
S
C D
T
V
W
V
Bumpy Chipbreaker
Standard Chipbreaker
Handed Chipbreaker
Break Master (CBN/PCD)
For Chamfering
W
Applicable Part Material: P Steel M Stainless Steel K Cast Iron N Non-Ferrous Metal S Exotic Alloy H Hardened Steel
Chipbreaker Application Range
Rough to Heavy Cutting (Inscribed Circle ø1.2205inch)
Rough to Heavy Cutting (Inscribed Circle ø.6250 to .7500inch)
Rough to Heavy Cutting (Inscribed Circle ø1 inch)
Aluminum Alloy
Hardened Steel
N
.60
.60
1.20
.16
.16
EHW
EHF
EHF
EHU EHW EHF
EGH
EHP
.40
.40
.80
H
EHU
(R/L)AX
EHG
EHP
.08
.08
ENP
.20
.20
.40
ENP
No Chipbreaker
Note: The maximum depth of cut of SNGG is 3.5mm
0
0
0
0
0
.016 .032 .047
.016 .032 .047
.024 .047 .070
.002
.004
.004
0.12
.020
Feed Rate f (inch/rev)
Feed Rate f (inch/rev)
Feed Rate f (inch/rev)
Feed Rate f (inch/rev)
Feed Rate f (inch/rev)
Indicated chipbreaker application ranges and shapes are representative values only. Actual values may change according to the actual catalogue number. For details, refer to "Stock Items" in Chapter B.
B12
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