Ball End Cobalt High Speed Steel
List 521: Single End, Regular Length, 2 Flute List 523: Double End, Regular Length, 2 Flute List 526: Single End, Regular Length, 2 Flute, Extension Type List 544: Single End, Regular Length, 4 Flute List 621: Ball End, Regular Length, 2 Flute List 644: Ball End, Regular Length, Multiple Flute Profiling
Hardness
<145 Brinell
<20 HRC
20-30 HRC
30-40 HRC
40-50 HRC
–
Medium Carbon Steels Medium Strength Titanium Alloys Medium Strength Stainless Steels
Heat Resistant High Alloys High Strength Stainless Steels Titanium Alloys
Mild Steels Hard Brass Bronze Cast Iron
High Carbon Steel Titanium Alloys High Strength Stainless Steels
Heat Resistant High Alloys Austenitic Alloys Nickel Base Alloys
Work Material
Aluminum Aluminum Alloys
Cutting Speed
80-150 SFM
80-110 SFM
50-65 SFM
30-50 SFM
16-32 SFM
80-390 SFM
a a 2FL = 1/2D 4FL = 1/4D
Depth of Cut
a r= 0.1D
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
Feed in/min
Mill Dia.
1/8
3,515 2,340 1,760 1,400 1,170 1,000
4.0 5.2 5.6 6.2 6.2 6.7 6.6 6.3 6.0 5.6 5.3 4.9 4.3 4.2 3.7
2,900 1,935 1,450 1,160
2.9 3.9 4.2 4.7 4.6 5.0 4.6 4.6 4.4 3.9 3.3 2.9 2.5 2.3 2.0
1,800 1,120
1.5 1.8 2.0 2.3 2.4 2.5 2.4 2.4 2.4 2.3 2.0 1.8 1.6 1.5 1.1
1,250
0.9 1.1 1.3 1.4 1.5 1.5 1.5 1.6 1.6 1.6 1.5 1.3 1.1 1.0 0.8
800 500 400 315 280 224 200 180 160 140 110 100
0.4 0.5 0.6 0.6 0.6 0.6 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.6 0.5
7,180 4,790 3,590 2,875 2,390 2,050 1,795 1,595 1,435 1,195 1,025
7.2 9.1 9.6
3/16
800 630 500 450 355 315 280 250 225 180 160 140 125 100
1/4
900 710 630 500 450 400 355 315 250 224 200 180 140
5/16
11.0 10.1 10.9 10.8 10.0
3/8
970 830 725 645 580 485 415 360 320 290 240
7/16
1/2
880 780 700 585 500 440 390 350 295
9/16
5/8 3/4 7/8
9.6 9.0 8.7 8.1 7.6 6.8 6.0
1
900 800 720 600
1-1/8 1-1/4 1-1/2
90 80 63
Reduce Speeds and Feeds by 10% for List 526 In case of deeper operation, slow down feed by 20-50%
osgtool.com
1504
End Mill Technical
Powered by FlippingBook