Speeds And Feeds for Carbide End mill Cutting Tools
SPEEDSSolid carbide end mills should be run at higher speeds than high speed steel end mills. Many times, lighter cuts at higher speeds can improve the finish of the work piece. Speeds should be reduced when milling hard or tough materials and when taking heavy cuts. Speeds should be increased when milling softer materials or when taking light cuts.
FEEDS
Generally, the feed per tooth, or chip load, may be maintained by using two, three, or four flute end mills. When peripheral milling, the highest feed rates can be achieved when the width of cut is less than the radius of the end mill. Feed rates can be increased when milling easily machined or abrasive materials. They should also be increased to eliminate chatter. The accompanying table gives recommended starting speeds and feeds of the most commonly used materials.
|
FEED PER TOOTH |
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|
MATERIAL |
SPEED (SFM) |
1/8 DIA. |
1/4 DIA. |
1/2 DIA. |
3/4 DIA. |
1 DIA. |
|
Aluminum/Aluminum Alloys |
850-1300 |
.0010 |
.0020 |
.0040 |
.0060 |
.0080 |
|
Brass / Bronze Soft |
400-700; |
.0010 |
.0020 |
.0030 |
.0040 |
.0080 |
|
Bronze / High Tensile |
250-400 |
.0010 |
.0020 |
.0030 |
.0040 |
.0080 |
|
Copper / Copper Alloys |
450-850 |
.0010 |
.0020 |
.0030 |
.0040 |
.0080 |
|
Iron, Hard Cast |
250-450 |
.0007 |
.0010 |
.0020 |
.0030 |
.0080 |
|
Iron, Soft Cast |
200-300 |
.0010 |
.0020 |
.0030 |
.0050 |
.0080 |
|
Iron, Malleable |
250-400 |
.0010 |
.0020 |
.0030 |
.0050 |
.0080 |
|
Monel / Nickel Base Alloys |
150-250 |
.0005 |
.0010 |
.0020 |
.0030 |
.0080 |
|
Molybdenum |
800-1100 |
.0010 |
.0020 |
.0040 |
.0060 |
.0080 |
|
Plastic and Related Materials |
800-1600 |
.0020 |
.0030 |
.0060 |
.0100 |
.0080 |
|
Steel, Hardened up to Rc 35 |
150-250 |
.0005 |
.0010 |
.0015 |
.0020 |
.0080 |
|
Steel, Hardened up to Rc 50 |
80-150 |
.0003 |
.0007 |
.0010 |
.0020 |
.0080 |
|
Steel, Hardened up to Rc 60 |
35-80 |
.0002 |
.0005 |
.0010 |
.0015 |
.0080 |
|
Steel, Low Carbon |
275-550 |
.0007 |
.0010 |
.0030 |
.0050 |
.0080 |
|
Steel, Tool |
100-235 |
.0005 |
.0010 |
.0020 |
.0030 |
.0080 |
|
Stainless Steel, Free Machining |
250-400 |
.0005 |
.0010 |
.0020 |
.0030 |
.0080 |
|
Stainless Steel, Work Hardening |
100-250 |
.0005 |
.0010 |
.0020 |
.0030 |
.0080 |
|
Titanium Alloys |
80-200 |
.0003 |
.0005 |
.0010 |
.0020 |
.0080 |
TOLERANCES: |
Cutter Diameter; +.0000 / -.0002 Shank Diameter; + .0000 / - .0005 |
