Mill/Drill Spindle Speeds

Spindle Speed = 4 x SFPM / Tool Diameter

Mill Feed Rate

Feed Rate = Chip Load x Teeth x Spindle Speed
Chip Loads: 0.001-0.002"

Lathe Spindle Speeds

Spindle Speed = 4 x SFPM / Part Diameter

Carbide End Mills

  Chip Load per Tooth
MaterialSFM1/8"1/4"1/2"
Plastics600.0010".0030".0060"
Aluminum600.0010".0020".0040"
Brass300.0010".002".003"
Mild Steel200.0010".0020".0030"
Stainless Steel150.0005".0010".0020"


HSS End Mills

  Chip Load per Tooth
MaterialSFM1/8"1/4"1/2"
Plastics400.0010".0015".0020"
Aluminum300.0010".0015".0020"
Brass150.0010".0020".0030"
Mild Steel100.0005".0010".0020"
Stainless Steel80.0005".0010".0020"