HP HEM High Performance Speed & Feed Chart Material Group Feed Per Tooth By Diameter (Inches) ALL4 Coating 1/4” 5/16” 3/8” 7/16” 1/2” 5/8” 3/4” 1” Aluminum & Aluminum Alloys 900-1800 .0020 .0025 .0030 .0035 .0040 .0050 .0060 .0080 Copper & Copper Alloys 525-1275 .0020 .0025 .0025 .0030 .0030 .0035 .0040 .0060 Brass & Bronze N 375-600 .0020 .0025 .0025 .0030 .0030 .0035 .0040 .0050 Graphite 500-1200 .0030 .0035 .0025 .0030 .0030 .0040 .0050 .0070 Plastics 600-1650 .0030 .0035 .0040 .0050 .0060 .0080 .0100 .0150 Soft Cast Iron 375-950 .0020 .0022 .0025 .0027 .0030 .0045 .0060 .0080 Hard Cast Iron K 150-475 .0008 .0010 .0015 .0017 .0020 .0025 .0030 .0040 Ductile Iron 200-900 .0010 .0012 .0015 .0017 .0020 .0030 .0040 .0060 Malleable Iron 275-850 .0010 .0015 .0020 .0025 .0030 .0040 .0050 .0070 Low Carbon Steels 350-900 .0010 .0015 .0020 .0025 .0030 .0040 .0050 .0070
Medium Carbon Steels
200-675 190-545 90-225 30-110 300-725 150-525 300-525 150-475 75-250 125-425 50-195 50-175
.0015 .0016 .0017 .0018 .0020 .0030 .0040 .0050 .0010 .0011 .0012 .0013 .0015 .0017 .0020 .0030 .0007 .0007 .0008 .0009 .0010 .0015 .0020 .0030 .0005 .0006 .0007 .0009 .0010 .0012 .0015 .0020 .0010 .0012 .0015 .0017 .0020 .0025 .0030 .0040 .0010 .0012 .0015 .0017 .0020 .0025 .0030 .0040 .0010 .0012 .0015 .0012 .0020 .0030 .0040 .0060 .0005 .0006 .0007 .0008 .0010 .0020 .0030 .0050 .0010 .0012 .0015 .0017 .0020 .0025 .0030 .0040 .0010 .0012 .0015 .0017 .0020 .0030 .0040 .0060 .0005 .0006 .0007 .0008 .0010 .0015 .0020 .0020 .0008 .0008 .0009 .0009 .0010 .0012 .0015 .0020
Carbon Steels Hardened to 35 Rc Carbon Steels Hardened to 50 Rc Carbon Steels Hardened to 60 Rc
P
Mold Steels Tool Steels
Soft Stainless Steels Hard Stainless Steels
M
Monel & High Nickel Steel
Soft Titanium Hard Titanium
S
Nickel Based High Temp Alloys
• Use the lower end of the speed range for 40 Taper Machines & the higher end of the speed range for 50 Taper Machines. • Higher feed per tooth should be used to start for radial depths of cut less than 25% of the tool diameter. Lower feed per tooth should be used to start for radial depths of cut greater than 25% of the tool diameter. • For HEM applications use the higher end of the SFM range. • For HEM applications which should have small radial depths of cut, make certain to increase the feed rate to compensate for Radial Chip Thinning Factor (RCTF). Consult a formula or app to calculate . • The above parameters are recommended starting points only. If the tool is working well, without vibrations or significant noise, increase SFM and/or Feed Per Tooth in 5-10% increments. • Optimum speeds & feeds will depend upon material, setup, machine conditions & tool deflection. Higher or lower parameters may be required to achieve optimum machining conditions. • Climb milling is preferred to Conventional milling. TECHNICAL MACHINING POINTS:
VIEW OR DOWNLOAD HEM SPEED AND FEED CHART
HP
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