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Surface Speeds (ft/min) for
H.S.S. Tools
Material |
Cutting Rake |
Surface Speed, H.S.S. |
H.S.S. |
Turn
Bore Part-Off |
Form |
Drill |
Screw
Die Tap |
Screw
Cut Single Point |
Mill |
A |
5° |
100 |
80 |
67 |
18 |
40 |
70-85 |
B |
5° |
130 |
110 |
85 |
25 |
45 |
70-110 |
C |
20°-30° |
550 |
420 |
280 |
55 |
95 |
300-1400 |
D |
15°-25° |
400 |
310 |
250 |
50 |
90 |
300-1400 |
E |
0°-5° |
280 |
220 |
180 |
50 |
90 |
200-300 |
F |
0°-5° |
230 |
180 |
140 |
40 |
75 |
140-200 |
G |
8°-10° |
200 |
160 |
110 |
30 |
50 |
110-140 |
H, K |
5° |
150 |
120 |
90 |
25 |
50 |
80-110 |
L |
5° |
125 |
95 |
75 |
20 |
40 |
55-75 |
M |
5° |
125 |
95 |
75 |
20 |
40 |
55-75 |
N |
5° |
100 |
80 |
65 |
20 |
35 |
45-60 |
P |
5° |
85 |
65 |
60 |
18 |
30 |
22-32 |
Top Surface
Speeds (ft/min) for Carbides, Feed (in./rev.) for Carbides
Tools
Material |
Cutting Rake |
Surface Speed, Carbides |
Feed Carbides |
Carbide |
Turn Face |
Bore Part-Off |
Mill |
Rough Turn |
Finish Turn |
Rough |
Finish |
Rough |
Finish |
A |
3° |
300 |
400 |
200 |
350 |
175-210 |
0.060 |
0.008 |
B |
3° |
250 |
400 |
180 |
250 |
175-260 |
0.060 |
0.010 |
C |
8°-15° |
Unlimited |
0.030 |
0.005 |
D |
8°-15° |
0.030 |
0.005 |
E |
3° |
1000 |
1500 |
300 |
1200 |
480-750 |
0.030 |
0.015 |
F |
0°-3° |
600 |
1000 |
400 |
600 |
350-500 |
0.080 |
0.012 |
G |
8° |
750 |
1000 |
500 |
750 |
260-350 |
0.040 |
0.008 |
H, K |
3° |
700 |
850 |
450 |
600 |
210-260 |
0.060 |
0.010 |
L |
0°-3° |
400 |
550 |
300 |
400 |
150-190 |
0.020 |
0.008 |
M |
-4°-
-2° |
300 |
400 |
200 |
300 |
140-175 |
0.020 |
0.008 |
N |
-2° |
220 |
250 |
150 |
150 |
110-145 |
0.015 |
0.005 |
P |
8° |
Up to 100 |
0.015 |
0.005 |
Some
manufacturers recommend milling at turning speeds. Correct
carbide grade must be used. Material
Code A= Malleable Iron, B= Cast Iron,
C=Magnesium alloys, D= Aluminum light alloys, E= Soft
Brass, F= Hard brass, G= Low Carbon steel (up to 0.3 per
cent C), H= Medium carbon steel (0.3-0.6 percent C), K =
Phosphor bronze, L= 40-60 ton alloy steel, M= High carbon
Steel (above 0.6 per cent C), N= Nickel chrome Steel (100
ton), P= Stainless Steel
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