Single End Cobalt High Speed Steel
List 591: 1˚ Taper on Side - 3 Flute
Side Milling
Hardness
<145 Brinell
<20 HRC
20-30 HRC
30-40 HRC
40-50 HRC
–
Mild Steels Brass Bronze Cast Iron
Med. Carbon Steels Hard Brass and Bronze Mild Steel Forgings
Heat Resistant High Alloys Austenitic Alloys Nickel Base Alloys
High Carbon Steel Unalloyed Titanium Ferritic Low Alloys
High Carbon Steel Unalloyed Titanium Ferritic Low Alloys
Work Material
Aluminum Aluminum Alloys
Cutting Speed
80-120 SFM
60-80 SFM
45-60 SFM
25-45 SFM
16-32 SFM
150-400 SFM
a a=1.5D a r= 0.1D
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
Speed RPM 13,445 11,200
Feed in/min
Mill Dia.
5/64 3/32
4,890 4,075 3,055 2,040 1,530 1,020
6.9 5.7 7.2 6.7 5.5 9.6 8.2 7.3
3,425 2,850 2,140 1,425 1,070
4.8 4.0 5.1 4.7 3.8 6.4 5.9 5.1
2,570 2,140 1,600 1,070
3.6 3.0 3.8 3.4 2.7 4.9 4.3 3.9
1,710 1,425 1,070
2.4 1.9 2.6 2.3 2.0 3.4 3.0 2.6
1,175
1.6 1.2 1.6 1.5 1.2 2.2 1.9 1.6
19.0 15.8 19.9 18.5 14.9 26.4 23.6 20.8
980 735 490 365 245 185 145
1/8
8,400 5,600 4,200 2,800 2,100 1,680
3/16
715 535 355 270 215
1/4 3/8 1/2 5/8
800 535 400 320
715 535 430
765 610
Slotting
Hardness
<145 Brinell
<20 HRC
20-30 HRC
30-40 HRC
40-50 HRC
–
Mild Steels Brass Bronze Cast Iron
Med. Carbon Steels Hard Brass and Bronze Mild Steel Forgings
Heat Resistant High Alloys Austenitic Alloys Nickel Base Alloys
High Carbon Steel Unalloyed Titanium Ferritic Low Alloys
High Carbon Steel Unalloyed Titanium Ferritic Low Alloys
Work Material
Aluminum Aluminum Alloys
Cutting Speed
80-120 SFM
60-80 SFM
45-60 SFM
10 - 20 SFM
8-15 SFM
150-350 SFM
Depth of Cut
a a=1/3D
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
Speed RPM 12,225 10,185
Feed in/min
Mill Dia.
5/64 3/32
4,890 4,075 3,055 2,040 1,530 1,020
3.5 3.6 3.8 3.4 3.5 4.8 4.3 3.7
3,420 2,850 2,140 1,425 1,070
2.2 2.5 2.6 2.4 2.5 3.2 3.0 2.6
2,570 2,140 1,600 1,070
1.4 1.5 1.8 1.6 1.8 2.2 2.2 1.9
776 640 480 320 240 160 120
0.5 0.4 0.6 0.5 0.4 0.7 0.6 0.6
504 416 312 208 156 104
0.3 0.2 0.3 0.3 0.2 0.4 0.4 0.3
6.9 5.7 7.2 6.7 7.5 9.6 8.6 7.6
1/8
7,640 5,095 3,820 2,545 1,910 1,530
3/16
1/4 3/8 1/2 5/8
800 535 400 320
715 535 430
765 610
78 62
96
osgtool.com
1511
End Mill Technical
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