MAX Maximum Performance End Mills for Hardened Steels
List 9140: MAX-HARD, Regular Length, 6 Flute List 9144: MAX-HARD, Regular Length, 6 Flute, Corner Radius
Side Milling
Hardness
–
<40 HRC
40-45 HRC
45-55 HRC
55-60 HRC
60-65 HRC
65-70 HRC
Hardened Steels Pre-hardened Steels Alloy Steels
Carbon Steels Cast Iron Mild Steels
Work Material Cutting Speed
Tool Steels Hardened Steels
Hardened Steels Alloy Steels
Hardened Steels
460 SFM
460 SFM
410 SFM
330 SFM
250 SFM
230 SFM
165 SFM
a a
a r
Dia D=1 D=2 D>2
a a=1.5D a r=0.05D arMax=1.0mm
a a=1.5D a r=0.03D arMax=0.5mm
a a=1.0D a r=0.02D arMax=0.5mm
1.5D 0.02D 1.5D 0.05D 1.5D 0.10D
Depth of Cut
arMax=1.0mm
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
Speed RPM
Feed in/min
Mill Dia.
1 20,000 31.5 20,000 31.5 20,000 31.5 20,000 31.5 20,000 22.0 20,000 18.9 16,000 13.4 2 20,000 63.0 20,000 63.0 20,000 63.0 16,000 49.2 12,000 26.4 11,000 21.1 7,950 13.4 3 15,000 70.9 15,000 70.9 13,500 63.0 10,500 49.2 7,950 26.4 7,450 21.1 5,300 13.4 4 11,000 70.9 11,000 70.9 9,950 63.0 7,950 49.2 5,950 26.4 5,550 21.1 4,000 13.4 5 8,900 70.9 8,900 70.9 7,950 63.0 6,350 49.2 4,750 26.4 4,450 21.1 3,200 13.4 6 7,450 104.3 7,450 104.3 6,650 94.5 5,300 74.8 4,000 39.4 3,700 31.5 2,650 19.9 8 5,550 104.3 5,550 104.3 4,950 94.5 4,000 74.8 3,000 39.4 2,800 31.5 2,000 19.9 10 4,450 104.3 4,450 104.3 4,000 94.5 3,200 74.8 2,400 39.4 2,250 31.5 1,600 19.9 12 3,700 104.3 3,700 104.3 3,300 94.5 2,650 74.8 2,000 39.4 1,850 31.5 1,350 19.9
1. Use a rigid and precise machine and holder. 2. We suggest using an air blow or MQL (Mist).
3. When using low speed machines, use the maximum speed and adjust feedrate. 4. During heavy load operations such as corner processing, reduce the speed and feed. 5. The run out of the end mill should be within 10 microns (0.0004")
High Speed Light Milling
Hardness
–
<40 HRC
40-45 HRC
45-55 HRC
55-60 HRC
60-65 HRC
65-70 HRC
Hardened Steels Pre-hardened Steels Alloy Steels
Carbon Steels Cast Iron Mild Steels
Work Material Cutting Speed
Tool Steels Hardened Steels
Hardened Steels Alloy Steels
Hardened Steels
1030 SFM
985 SFM
985 SFM
820 SFM
525 SFM
490 SFM
330 SFM
a a=1.0D a r=0.05D arMax=0.8mm
a a=1.0D a r=0.05D arMax=0.5mm
a a=1.0D a r=0.03D arMax=0.5mm
a a=1.0D a r=0.02D arMax=0.2mm
a a=1.0D a r=0.01D arMax=0.2mm
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
Feed in/min
Speed RPM
Feed in/min
Mill Dia.
1 25000 31.5 25000 31.5 25000 39.4 25000 39.4 25000 31.5 25000 28.0 25000 22.0 2 25000 66.9 25000 67.3 25000 78.7 25000 78.7 25000 63.7 24000 53.1 16000 31.5 3 25000 105.7 25000 106.1 25000 116.9 25000 118.9 17000 65.0 16000 53.1 10500 31.5 4 25000 162.1 24000 153.5 24000 149.6 20000 126.0 12500 65.0 12000 53.1 7950 31.5 5 20500 173.2 19000 161.4 19000 149.6 16000 126.0 10000 65.0 9550 53.1 6350 31.5 6 17000 240.2 16000 226.4 16000 226.4 13500 189.0 8500 96.5 7950 78.7 5300 47.2 8 12500 240.2 12000 226.4 12000 226.4 9950 189.0 6350 96.5 5950 78.7 4000 47.2 10 10000 240.2 9550 226.4 9550 226.4 7950 189.0 5100 96.5 4800 78.7 3200 47.2 12 8500 240.2 7950 226.4 7950 226.4 6650 189.0 4250 96.5 4000 78.7 2650 47.2
1. Use a rigid and precise machine and holder. 2. We suggest using an air blow or MQL (Mist).
3. When using low speed machines, use the maximum speed and adjust feedrate. 4. During heavy load operations such as corner processing, reduce the speed and feed. 5. The run out of the end mill should be within 10 microns (0.0004")
osgtool.com
1373
End Mill Technical
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