V6
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Recommended Grades and Cutting Speeds Vc [m/min]<br />
Material<br />
Group<br />
P<br />
Steel<br />
M<br />
Stainless<br />
Steel<br />
K<br />
Cast Iron<br />
N(K)<br />
Non-Ferrous<br />
Metals<br />
S(M)<br />
Heat<br />
Resistant<br />
Material<br />
Vardex No.<br />
1<br />
Material<br />
Hardness<br />
Brinell HB<br />
Vc[m/min]<br />
Coated<br />
VKX<br />
Low carbon (C=0.1-0.25%) 125 115-190<br />
2 Unalloyed steel Medium carbon (C=0.25-0.55%) 150 100-175<br />
3 High Carbon (C=0.55-0.85%) 170 90-165<br />
4<br />
Non hardened 180 100-180<br />
5<br />
Low alloy steel<br />
Hardened<br />
(alloying elements≤5%)<br />
275 75-140<br />
6 Hardened 350 70-135<br />
7 High alloy steel Annealed 200 80-120<br />
8 (alloying elements>5%) Hardened 325 50-100<br />
9<br />
Cast steel<br />
Low alloy (alloying elements 5%) 225 60-120<br />
11 Stainless steel Non hardened 200 70-130<br />
12 Feritic<br />
Hardened 330 60-115<br />
13 Stainless steel Austenitic 180 90-140<br />
14 Austenitic<br />
Super Austenitic 200 40-110<br />
15 Stainless steel Non hardened 200 90-120<br />
16 Cast Feritic<br />
Hardened 330 65-110<br />
17 Stainless steel Austenitic 200 85-110<br />
18 Cast austenitic Hardened 330 60-100<br />
28 Malleable<br />
Ferritic (short chips) 130 60-70<br />
29 Cast iron<br />
Pearlitic (long chips) 230 60-145<br />
30<br />
Grey cast iron<br />
Low tensile strength 180 70-130<br />
31 High tensile strength 260 60-115<br />
32<br />
Nodular SG iron<br />
Feritic 160 125-160<br />
33 Pearlitic 260 90-120<br />
34 Aluminium alloys Non aging 60 100-365<br />
35 Wrought<br />
Aged 100 80-220<br />
36<br />
Aluminium alloys<br />
Cast 75 200-400<br />
37 Cast & aged 90 200-280<br />
38 Aluminium alloys Cast Si 13-22% 130 60-180<br />
39 Copper and<br />
Brass 90 80-225<br />
40 Copper alloys Bronze and non leaded copper 100 80-255<br />
19<br />
Annealed (Iron based ) 200 45-60<br />
20 High temperature Aged (Iron based) 280 30-50<br />
21 alloys<br />
Annealed (Nickel or Cobalt based) 250 20-30<br />
22 Aged (Nickel or Cobalt based) 350 15-25<br />
23<br />
Pure 99.5 Ti 400Rm 140-170<br />
Titanium alloys<br />
24 α+β alloys 1050Rm 50-70<br />
Calculation of N [RPM]<br />
N<br />
N = 1000 x V c<br />
π x D<br />
Vc = N x π x D<br />
1000<br />
D<br />
Vc<br />
N - Revolution Per Minute [RPM]<br />
Vc - Cutting Speed [m/min]<br />
D - Workpiece Diameter [mm]<br />
VKX<br />
Excellent grade for general use.<br />
H(K)<br />
Hardened<br />
Material<br />
25<br />
45-50HRc 45-60<br />
Extra hard steel Hardened & tempered<br />
26 51-55HRc 40-50<br />
Number of Passes<br />
Pitch mm 0.50 0.75 1.00 1.25 1.50 1.75 2.00<br />
tpi 48 32 24 20 16 14 12<br />
No. of passes 3-6 3-6 4-8 4-8 5-9 6-11 6-11<br />
11
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