HY-PRO ® CARB Performance Sub-Micrograin Carbide End Mills
List HP421BN, HP441BN: (continued)
High Speed Light Milling (Fractional)
Hardness
<20 HRC
20-30 HRC
30-38 HRC
38-45 HRC
45-55 HRC
55-60 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
Hardened Steels
Cutting Speed
985 SFM
855 SFM
740 SFM
590 SFM
590 SFM
400 SFM
Dia a r D≤5/32 0.02D 0.05D 5/32<D 0.13D 0.05D a a
a a=0.02D a r=0.05D
Depth of Cut
Speed RPM 25,000 25,000 25,000 24,100 20,100 15,050 12,050 10,050
Feed in/min
Speed RPM 25,000 25,000 25,000 20,900 17,450 13,100 10,500
Feed in/min
Speed RPM 25,000 25,000 22,650 18,100 15,100 11,300
Feed in/min
Speed RPM 25,000 24,050 18,050 14,450 12,050
Feed in/min
Speed RPM 25,000 24,050 18,050 14,450 12,050
Feed in/min
Speed RPM 24,450 16,300 12,250
Feed in/min
Mill Dia.
1/16 3/32
80.3
77.6
69.9
65.9
63.4 99.4
54.3 58.4 59.7 52.9 49.3 42.0 35.4 28.7 24.0 20.9 17.3 14.6 10.6
125.5 174.8 192.4 198.9 189.5 151.1 125.1 102.8
127.6 181.6 177.8 180.2 164.9 132.4 108.4
115.4 146.5 129.3 121.5 106.1
104.4 110.5 101.7
1/8
106.7
5/32 3/16
96.7 96.3 83.8 67.7 55.1 45.7 40.2 33.9 28.3 21.2
9,800 8,150 6,100 5,000 4,100 3,400 3,000 2,450 2,100 1,530
96.5 83.8 67.7 55.1 45.7 40.2 33.9 28.3 21.2
1/4
9,000 7,250 5,900 4,950 4,300 3,600 3,000 2,250
9,000 7,250 5,900 4,950 4,300 3,600 3,000 2,250
5/16
9,050 7,400 6,200 5,450 4,500 3,750 2,830
83.9 69.3 57.9 50.4 41.7 35.4 26.7
3/8
8,700 7,450 6,550 5,200 4,350 3,270
7/16
8,250 7,250 6,050 5,050 3,765
92.3 81.3 63.8 54.7 41.1
1/2 5/8 3/4
90.2 75.6 62.6 46.8
1
Increase feeds 40% to 50% for Series HP441BN.
High Speed Light Milling (Metric)
Hardness
<20 HRC
20-30 HRC
30-38 HRC
38-45 HRC
45-55 HRC
55-60 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
Hardened Steels
Cutting Speed
985 SFM
855 SFM
740 SFM
590 SFM
590 SFM
400 SFM
Dia a r D≤4 0.02D 0.05D 4<D 0.13D 0.05D a a
a a=0.02D a r=0.05D
Depth of Cut
Speed RPM 25,000 25,000 25,000 23,900 19,150 15,950 12,000
Feed in/min
Speed RPM 25,000 25,000 25,000 20,750 16,600 13,850 10,400
Feed in/min
Speed RPM 25,000 25,000 23,950 17,950 14,350 12,000
Feed in/min
Speed RPM 25,000 25,000 19,100 14,350 11,450
Feed in/min
Speed RPM 25,000 25,000 19,100 14,350 11,450
Feed in/min
Speed RPM 25,000 19,400 12,950
Feed in/min
Mill Dia.
1 2 3 4 5 6 8
55
55
49 99
47 93
47 93
39 60 62 53 49 44 34 28 23 19 17 15 14 12 11
108 170 192 202 201 150 119
109 175 178 181 174 131 103
151 129 119 113
113 102
113 102
9,700 7,750 6,450 4,850 3,900 3,250 2,750 2,450 2,150 1,950 1,750 1,550
96 89 67 54 44 39 34 30 27 24 22
96 89 67 54 44 39 34 30 27 24 22
9,550 7,150 5,750 4,750 4,100 3,600 3,200 2,850 2,600 2,300
9,550 7,150 5,750 4,750 4,100 3,600 3,200 2,850 2,600 2,300
9,000 7,200 6,000 5,150 4,500 4,000 3,600 3,250 2,850
83 67 56 48 42 38 34 31 27
10 12 14 16 18 20 22 25
9,550 7,950 6,850 6,000 5,300 4,800 4,350 3,850
8,300 6,900 5,950 5,200 4,600 4,150 3,750 3,300
99 85 75 65 60 54 48
85 73 64 58 52 47 41
Increase feeds 40% to 50% for Series HP441BN.
osgtool.com
1496
End Mill Technical
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