VP Variable Pitch Speed & Feed Chart
Feed Per Tooth By Diameter (Inches) TiALN Coated 1/4” 5/16” 3/8” 7/16” 1/2” 5/8” 3/4” 1” 900-1800 .0020 .0025 .0030 .0035 .0040 .0050 .0060 .0080 525-1275 .0020 .0025 .0025 .0030 .0030 .0035 .0040 .0060
Material Group
Aluminum & Aluminum Alloys
Copper & Copper Alloys
Brass & Bronze
375-600
.0020 .0025 .0025 .0030 .0030 .0035 .0040 .0050
N
Graphite Plastics
500-1200 .0030 .0035 .0025 .0030 .0030 .0040 .0050 .0070 600-1650 .0030 .0035 .0040 .0050 .0060 .0080 .0100 .0150
Soft Cast Iron Hard Cast Iron
375-650 100-375 100-600 225-650 300-600 150-375 130-345 70-160
.0020 .0022 .0025 .0027 .0030 .0045 .0060 .0080 .0008 .0010 .0015 .0017 .0020 .0025 .0030 .0040 .0010 .0012 .0015 .0017 .0020 .0030 .0040 .0060 .0010 .0015 .0020 .0025 .0030 .0040 .0050 .0070 .0010 .0015 .0020 .0025 .0030 .0040 .0050 .0070 .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
K
Ductile Iron
Malleable Iron
Low Carbon Steels Medium Carbon Steels
Carbon Steels Hardened to 35 Rc Carbon Steels Hardened to 50 Rc Carbon Steels Hardened to 60 Rc
P
30-90
Mold Steels Tool Steels
300-525 150-375 300-450 150-300 75-200 125-375 50-175 50-125
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. • The above recommendations are for axial lengths of cut not to exceed 1.25 times the tool diameter for profiling and .75 times the diameter for full slotting. • 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. • For lighter 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. • Climb milling is preferred to Conventional milling. TECHNICAL MACHINING POINTS: VP VIEW OR DOWNLOAD VP SPEED AND FEED CHART
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