Roughing Cut Cobalt High Speed Steel
List 455: Multiple Flute - Fine Pitch - Center Hole
Side Milling
Hardness
<145 Brinell
<20 HRC
20-30 HRC
30-40 HRC
<45 HRC
High Tensile Steels 4140, 4340 304 Stainless Steels TI-Alloy
Cast Iron Mild Steel Forgings Brass
D2 H13 17-4PH
Heat Resistant Alloys Inconel 718 Heat Treated Materials
Work Material
Medium Carbon Steels Mild Steel Forgings
Cutting Speed
150 SFM
120 SFM
90 SFM
65 SFM
50 SFM
Dia a r 1/4≤D≤2 1.5D 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.
1/4
2,300 1,800 1,500 1,150
4.6 5.7 6.6 6.3 7.9 8.7 8.4 8.4 8.3 8.3 7.1 7.2
1,800 1,500 1,200
3.4 4.7 5.4 5.1 5.9 6.6 6.5 5.6 6.0 7.1 5.5 5.6
1,400 1,100
2.6 3.4 4.0 3.6 4.3 5.0 4.9 4.3 4.4 4.6 3.7 4.2
1,000
1.7 2.5 2.8 2.6 3.1 3.9 3.5 3.1 3.2 3.5 2.5 2.6
750 600 500 400 300 250 210 190 160 150 120
1.5 1.6 1.7 1.5 1.7 1.9 1.8 1.7 1.7 1.9 1.5 1.6
5/16
800 650 500 400 350 300 250 220 200 160 125
3/8 1/2 5/8 3/4 7/8
900 700 550 450 400 350 300 250 200 170
950 750 600 525 450 400 375 300 230
900 750 650 575 500 450 375 285
1
1-1/8 1-1/4 1-1/2
2
95
Slotting
Hardness
<145 Brinell
<20 HRC
20-30 HRC
30-40 HRC
<45 HRC
High Tensile Steels 4140, 4340 304 Stainless Steels TI-Alloy
Cast Iron Mild Steel Forgings Brass
D2 H13 17-4PH
Heat Resistant Alloys Inconel 718 Heat Treated Materials
Work Material
Medium Carbon Steels Mild Steel Forgings
Cutting Speed
150 SFM
120 SFM
90 SFM
65 SFM
50 SFM
Dia a a 1/4≤D≤2 0.8D
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.
1/4
2,300 1,800 1,500 1,150
6.1 8.4
1,800 1,500 1,200
4.6 5.9 5.9 5.5 7.5 7.2 6.9 6.6 8.7 7.8 7.0
1,400 1,100
3.3 3.9 4.4 4.1 4.8 4.4 4.7 4.4 4.6 4.2 3.2
1,000
2.4 2.8 3.2 2.9 3.1 3.6 3.5 3.3 3.6 3.1 1.6
750 600 500 400 300 250 210 190 150 120
1.6 1.7 1.8 1.7 2.4 2.7 2.5 2.1 2.4 1.9 1.4
5/16
800 650 500 400 350 300 250 200 160 100
3/8 1/2 5/8 3/4 7/8
10.5
900 700 550 450 400 350 250 225 180
9.6
950 750 600 525 450 375 300 250
900 750 650 575 450 400 300
12.5 13.9 12.8 12.0 12.5 10.7
1
1-1/4 1-1/2
2
8.2
90
osgtool.com
1420
End Mill Technical
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