CORRECTION FACTORS – INDEXABLE MILLS
Correction factors for specific type of cutter and operation C VcO
x.v
Face mills with KAPR 45° – 60° and negative inserts (SHN06C, SHN09C, CHN09, …) Face mills with KAPR 45° and positive inserts (SOE06Z, SOE09Z, SOD05,...) Shoulder mills with KAPR 90° (SAD07D, SAD11E, SAD16E, SLN12, SLN16..) Copy face mills (SRC10 – SRC20, SRD05 – SRD16, …) Copy end mills (K2-PPH, K2-SLC, K2-SRC, K3-CXP…) Disc mills (S90CN(XN), S90SN...)
1.15
1.00
0.85
1.15
1.00
0.85
1.10
1.00
0.90
1.10
1.00
0.90
1.10
1.00
0.90
1.10
1.00
0.90
Shoulder mills with extended flute J(T)-CSD12X, J(T)-SAD11E, J(T)-SAD16E...) Face mills for heavy duty (FSB22X, SPN13..) Shoulder mills for heavy duty (FTB27X..)
1.25
1.00
0.80
1.30
1.00
0.85
1.25
1.00
0.85
Correction factors for required durability C VcT
15
20
30
45
60
90
120
minutes
General machining operations (fine finishing up to roughing) Heavy machining operations (heavy roughing)
1.23
1.13
1.00
0.89
0.81
0.72
–
–
–
1.23
1.13
1.00
0.89
0.81
Additional correction factors C VcA
C VcA 0.70 0.85 1.00 1.20
Machining environment
Condition of the work-material (hard skin due to forging or casting) Unstable machining conditions Common machining conditions Stable machining conditions
Correction factors for cutting speed when face and shoulder milling with < 100 % radial immersion C VcRCT
a e
DC 5 % 10 % 15 % 20 % 25 % 30 % 40 % 50 % 60 % 70 % 75 % 80 % 90 % 100 % x.v 1.48 1.35 1.27 1.22 1.19 1.16 1.11 1.08 1.05 1.03 1.00 1.00 1.00 1.00
Resulting corrected cutting speed vcc
vcc = v c × k vG × C VcO × C VcT × C VcA × Cf zRCT
– starting speed from catalogue page
v c
k vG – coefficient of used material
77
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