Machining Speeds
Figuring your SFM (Surface Feet/Minute, which will determine your RPM)
SFM with HSS endmills
Stainless Steel 40
Mild Steel 100
Brass 300
Aluminum 400
With carbide endmills, multiply those settings by 3 as a starting point, so:
SFM with Carbide Endmills
Stainless Steel 120
Mild Steel 300
Brass 900
Aluminum 1200
SFM with HSS endmills
Stainless Steel 40
Mild Steel 100
Brass 300
Aluminum 400
With carbide endmills, multiply those settings by 3 as a starting point, so:
SFM with Carbide Endmills
Stainless Steel 120
Mild Steel 300
Brass 900
Aluminum 1200
RPM = 4 x SFM/Diameter
RPM is spindle speed on mill and material speed on the lathe.
RPM is spindle speed on mill and material speed on the lathe.