Roughing Cut Cobalt High Speed Steel
List 440: Ball End - Multiple Flute - General Purpose - Regular Pitch
Side Milling
Hardness
<145 Brinell
<20 HRC
20-30 HRC
30-40 HRC
–
High Carbon Steel Titanium Alloys Medium Strength Stainless Effects
Heat Resistant High Alloys Austenitic Alloys Tool Steels
Mild Steels Carbon Steels Cast Iron
Medium Carbon Steels Hard Brass and Bronze Cast Iron
Work Material
Aluminum Aluminum Alloys
Cutting Speed
100-130 SFM
60-75 SFM
40-55 SFM
26-40 SFM
190-330 SFM
Dia a r 1/2≤D≤1 1.5D 0.5D 1-1/4≤D≤2 1.0D 0.5D a a
Depth of Cut
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Mill Dia.
1/2 5/8 3/4
875 700 590 500 350 300 250
3.9 4.4 4.1 5.0 5.0 5.0 4.3
500 420 350 250 200 175 130
2.7 3.1 3.1 2.9 3.3 3.3 2.7
365 300 250 180 150 120
1.7 1.9 2.0 1.8 2.3 1.9 1.6
250 200 170 125 100
1.1 1.3 1.2 1.3 1.4 1.3 1.2
2,000 1,600 1,350 1,000
12.6 14.1 13.9 14.2 15.9 14.3 11.7
1
1-1/4 1-1/2
800 650 500
80 65
2
90
Slotting
Hardness
<145 Brinell
<20 HRC
20-30 HRC
30-40 HRC
–
High Carbon Steel Titanium Alloys Medium Strength Stainless Effects
Heat Resistant High Alloys Austenitic Alloys Tool Steels
Mild Steels Carbon Steels Cast Iron
Medium Carbon Steels Hard Brass and Bronze Cast Iron
Work Material
Aluminum Aluminum Alloys
Cutting Speed
80-150 SFM
50-65 SFM
30-50 SFM
16-32 SFM
80-390 SFM
a a
# of Flutes
Depth of Cut
4FL 6FL 8FL
1/4D 1/6D 1/8D
a r = 0.3D
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Mill Dia.
1/2 5/8 3/4
1,000
10.5
450 355 315 224 180 140 112
3.3 3.0 2.8 2.2 1.7 1.1 1.1
315 250 225 160 125 100
2.1 2.0 2.0 1.6 1.1 0.8 0.8
200 160 140 100
1.1 0.9 0.9 0.9 0.7 0.5 0.5
2,500 2,000 1,800 1,250 1,000
21.0 16.7 16.9 14.1 10.5
800 710 500 400 315 250
8.5 8.5 7.0 5.3 4.0 3.9
1
1-1/4 1-1/2
80 63 50
800 630
8.0 7.8
2
80
In case of deeper operation, slow down feed by 20-50%.
osgtool.com
1505
End Mill Technical
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