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First Choice — Alloyed Steel


Negative Inserts – Alloyed Steel Metric


Introduction
ap (mm)
1,2 - 5,5
ap (mm)
0,75 - 3,0
ap (mm)
0,5 - 2,0
fn (mm/rev)
0,25 - 0,5
D.O.C. ap (mm)


fn (mm/rev)
0,15 - 0,45
fn (mm/rev)
0,1 - 0,3
NL920 NL400
Vc (m/min) Vc (m/min)
20 - 55 4T 30 - 130
NL920 NL300
Vc (m/min)
20 - 55 2N Vc35(m/min)
-140
NL300
Vc (m/min)
NL250 NL250 60 - 230
Vc (m/min) Vc (m/min) NL250
25 - 95 1B 35 - 145 Vc (m/min)
60 - 240
SP0819
Vc (m/min)
80 - 270
* ROUGHING
MEDIUM
FINISHING
0,0
Feed fn (mm/rev)
*Note: For Heavy Roughing applications see 5R geometry, page C17.


Positive Inserts – Alloyed Steel Metric

ap (mm)
0,4 - 5,0

ap (mm)
0,25 - 3,0
fn (mm/rev)
0,07 - 0,5
D.O.C. ap (mm)


fn (mm/rev)
0,025 - 0,25

NL920 NL300
Vc (m/min)
20 - 55 73 Vc35(m/min)
- 140
SP4019 SP4019 SP4019
Vc (m/min) Vc (m/min) Vc (m/min)
80 - 265
30 - 110 62 50 - 160
SP4019
Vc (m/min)
80 - 265
MEDIUM-
ROUGHING
FINISHING
0,0
Feed fn (mm/rev)
Please note the above recommended cutting speeds, geometries and grades are for guidance only.
For more detailed information, see pages C12 - C23 (geometry technical information & grade technical information).

Interrupted Varying depth Good
Key cut of cut condition


www.kennametal.com C5