HY-PRO ® CARB Performance Sub-Micrograin Carbide End Mills
List HP421, HP441 (Continued)
High Speed Light Milling (Fractional)
Hardness
<20 HRC
20-30 HRC
30-38 HRC
38-45 HRC
45-55 HRC
Hardened Steels Pre-hardened Steels Stainless Steels Inconel Ni Based Alloys
Hardened Steels Pre-hardened Steels Ti Alloys (Solution Treated and Aged)
Alloy Steels Tool Steels Ti Alloys (Annealed)
Work Material
Mild Steels Carbon Steels
Hardened Steels
Cutting Speed
1,310 SFM
1,150 SFM
820 SFM
490 SFM
260 SFM
Dia a r D<5/16 1.5D 0.01D 5/16≤D<5/8 1.5D 0.02D 5/8≤D 1.5D 0.05D a a
Dia a r D≤5/16 1D 0.01D 5/16<D 1D 0.02D a a
Depth of Cut
Speed RPM 25,000 25,000 25,000 25,000 25,000 20,000 15,650 13,200 11,350
Feed in/min
Speed RPM 25,000 25,000 25,000 25,000 23,550 17,600 13,650 11,550 10,000
Feed in/min
Speed RPM 25,000 25,000 25,000 20,100 16,850 12,450
Feed in/min
Speed RPM 25,000 20,800 15,200 12,000 10,100
Feed in/min
Speed RPM 15,900 11,050
Feed in/min
Mill Dia.
1/16 3/32
14.7 27.1 49.3 64.7
18.8 31.2 49.6 64.4 81.1 84.3 82.7 82.7 82.7 81.1 76.8 73.6 58.3
18.4 32.6
16.6 24.4
11.9 14.2 14.6 16.1 17.3 16.5 16.5 16.5 16.1 15.7 14.6 14.2 10.6
1/8
49
26
8,050 6,400 5,350 4,000 3,150 2,650 2,250 1,950 1,550 1,300
5/32 3/16
52.8 54.3 58.7 57.1 57.1 57.1 55.5 53.1 51.2 40.6
26.8 28.7 31.1 31.1 31.1 31.1 30.3
104.5
1/4
96.5 96.5 97.6 97.2 94.9 88.6 85.4 65.7
7,600 6,000 5,000 4,300 3,750 2,950 2,450 1,850
5/16
9,950 8,400 7,150 6,250 4,950 4,150 3,100
3/8
7/16
1/2 5/8 3/4
9,950 8,000 6,650 4,950
8,750 7,000 5,800 4,400
28
26.8 21.7
1
950
Reduce feeds 50% for Series HP421 High Speed Light Milling.
osgtool.com
1396
End Mill Technical
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