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Q. What are some recommended starting feeds & speeds for your endmills?
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Proper feeds & speeds results in longer tool life because chatter and overheating is eliminated.  Speed ranges vary for each type of material depending on its machinability due to its condition, structure, hardness, etc.  Speeds should be reduced as material becomes more difficult to machine. Reduce feed for smaller diameters.  Light cuts at higher speeds improve work piece finish.
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STARTING SPEEDS & FEEDS FOR CUT-RIGHT TOOLS 
HIGH PERFORMANCE CARBIDE END MILLS (UNCOATED):

MATERIAL SPEED (SFM) 1/8” 1/4” 1/2” 3/4” 1”
ALUMINUM/ALUMINUM ALLOYS

500-2000

.0005

.0020

.0040

.0060

.0070
BRASS & BRONZE

300-550

 .0010 .0020

.0030

.0040 .0050
CAST & MALLEABLE IRON *80-475 .0005 .0015 .0030 .0050

.0070

FIBERGLASS & PLASTICS 350-800 .0015 .0030 .0040 .0060 .0120

NICKLE ALLOYS, INCONEL, MONEL

*45-125 .0004 .0010 .0020 .0030 .0040
STAINLESS STEEL TO 30 Rc 80-350 .0005 .0010 .0020 .0040 .0060
STAINLESS STEEL 30 Rc & UP 90-200 .0002 .0005

.0010

.0030 .0050
STEEL TO 40 Rc LOW CARBON *250-325 .0005 .0010 .0030

.0050

.0070
STEEL MEDIUM CARBON 40-50 Rc 125-300

.0006

.0015 .0020 .0040 .0050
STEEL HARDENED 50 Rc & UP

75-100

.0002 .0005

.0010

.0020 . 0030
TITANIUM ALLOYS *50-250 .0005 .0005 .0010

.0020

.0040
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Q. How are feeds & speeds adjusted for coated tools?  Generally:
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TiAlN Coating:  Speed-increase RPM 50-100% over operating parameters of uncoated tools and TiN coated tooling.  Feed rate remains the same.  Best performance is obtained when maximum heat at the cutting edge oxidizes the aluminum in the coating.

TiCN Coating:  Speed-start at the high-end parameters above.  Feed rate remains the same.

TiN Coating:  Speed-increase 20% over uncoated tooling parameters above.  Feed rate remains the same.

 Notes:

* TiAlN Coating is required for Nickle Based alloys such as inconel.  Add 50-80% to SFM
* On steel w/>45 Rc use coolant for roughing and run finishing dry. TiCN add 40% to SFM and TiAlN add 50-100% to SFM.
* Always use coolant for Ductile Cast Iron.  TiCN add 40% to SFM.  TiAlN add 50-100% to SFM
* Always use coolant for Titanium Alloys.  TiCN add 40% to SFM.  TiAlN add 50-100% to SFM
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