HSM Guide Speed & Feed Recommendations for 3-D Machining with OSG Ball End Mills
For Extra Long LDR (Beyond 8:1) Speeds
Roughing & Semi-finishing
Finishing
Diameter
RPM
RPM
30 - 40 HRC 19,200 – 30,000 13,200 – 21,000 10,800 – 15,600 9,600 – 14,400 7,500 – 9,888 6,060 – 8,400 5,700 – 7,950 5,280 – 7,260 4,740 – 6,240 4,140 – 5,460
40 - 50 HRC 16,000 – 25,000 11,000 – 17,500 9,000 – 13,000 8,000 – 12,000 6,250 – 8,240 5,050 – 7,000 4,600 – 6,625 4,400 – 6,050 3,950 – 5,200 3,450 – 4,550
50 - 60 HRC 12,300 – 20,000 8,300 – 14,000 6,700 – 10,400 5,900 – 9,600 4,500 – 6,592 3,540 – 5,600 3,180 – 5,300 3,020 – 4,840 2,660 – 4,160 2,260 – 3,640
30 - 40 HRC 10,000 – 25,000 10,000 – 25,000 10,000 – 25,000 10,000 – 25,000 10,000 – 17,000 9,000 – 12,200 7,300 – 9,500 6,000 – 8,100 5,000 – 6,950 4,550 – 6,100
40 - 50 HRC 10,000 – 25,000 10,000 – 25,000 10,000 – 25,000 10,000 – 19,000 10,000 – 13,000 7,500 – 9,000 6,000 – 7,000 5,000 – 6,000 4,350 – 5,200 3,900 – 4,900
50 - 60 HRC 10,000 – 25,000 10,000 – 25,000 10,000 – 25,000 10,000 – 15,250 8,000 – 10,150 6,000 – 7,500 4,850 – 6,000 4,050 – 5,000 3,450 – 4,350 3,050 – 3,800
1/32 1/16 3/32
1/8
3/16
1/4
5/16
3/8
7/16
1/2
Chip Load per Tooth
30 - 40 HRC
40 - 50 HRC
50 - 60 HRC
Diameter
Rough & Semi 0.0003 – 0.0005 0.0006 – 0.0008 0.0010 – 0.0013 0.0013 – 0.0015 0.0018 – 0.0022 0.0025 – 0.0030 0.0032 – 0.0035 0.0035 – 0.0040 0.0040 – 0.0044 0.0044 – 0.0050
Finishing
Rough & Semi 0.0003 – 0.0004 0.0005 – 0.0008 0.0008 – 0.0011 0.0010 – 0.0014 0.0016 – 0.0021 0.0025 – 0.0029 0.0026 – 0.0033 0.0031 – 0.0039 0.0034 – 0.0042 0.0040 – 0.0046
Finishing
Rough & Semi 0.0002 – 0.0004 0.0004 – 0.0006 0.0006 – 0.0010 0.0009 – 0.0011 0.0015 – 0.0020 0.0020 – 0.0025 0.0026 – 0.0031 0.0030 – 0.0036 0.0033 – 0.0040 0.0039 – 0.0045
Finishing
1/32 1/16 3/32
0.0003 – 0.0005 0.0005 – 0.0008 0.0007 – 0.0012 0.0010 – 0.0014 0.0016 – 0.0021 0.0020 – 0.0027 0.0027 – 0.0034 0.0031 – 0.0040 0.0034 – 0.0043 0.0040 – 0.0047
0.0003 – 0.0004 0.0005 – 0.0007 0.0007 – 0.0010 0.0010 – 0.0013 0.0015 – 0.0020 0.0020 – 0.0026 0.0026 – 0.0032 0.0027 – 0.0033 0.0030 – 0.0039 0.0035 – 0.0045
0.0002 – 0.0003 0.0004 – 0.0005 0.0005 – 0.0007 0.0008 – 0.0010 0.0012 – 0.0016 0.0019 – 0.0024 0.0023 – 0.0027 0.0025 – 0.0031 0.0027 – 0.0035 0.0031 – 0.0041
1/8
3/16
1/4
5/16
3/8
7/16
1/2
Axial Depths of Cut ( a a) 30 - 40 HRC 10% of Diameter 40 - 50 HRC 7% of Diameter 50 - 60 HRC 5% of Diameter
Radial Depths of Cut ( a r) Up to 35% of Diameter for roughing and semi-finishing operations. However, radial depths of cut for finishing operations are normally determined by the surface finish requirements specific to each application.
osgtool.com
1517
End Mill Technical
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