Feed Rate Calculator
Calculate the table feed rate for milling operations from spindle speed, feed per tooth, and number of teeth.
Table Feed Rate (Vf)
400 mm/min
Table Feed Rate (Vf) vs Feed per Tooth (fz)
Formula
## Milling Feed Rate Calculation The table feed rate determines how fast the workpiece moves past the cutter. ### Formula **Vf = fz x z x N** where fz is the feed per tooth (chip load), z is the number of cutting teeth on the milling cutter, and N is the spindle speed in RPM. The result is the linear table feed rate in mm/min.
Exemplo Resolvido
A 4-flute end mill at 1000 RPM with 0.1 mm/tooth feed.
- 01Feed per revolution = 0.1 x 4 = 0.4 mm/rev
- 02Table feed = 0.1 x 4 x 1000 = 400 mm/min
Perguntas Frequentes
What determines the optimal feed per tooth?
Feed per tooth depends on tool material, workpiece material, cutter diameter, and depth of cut. Typical values: aluminium with carbide 0.05-0.20 mm/tooth, steel with carbide 0.05-0.15 mm/tooth, cast iron 0.10-0.25 mm/tooth.
What happens if feed rate is too high?
Excessive feed causes poor surface finish, tool breakage, machine overload, and potentially inaccurate dimensions. Tool chipping is common with excessive chip loads.
What happens if feed rate is too low?
Too-low feed creates rubbing instead of cutting, generating excess heat and causing work hardening of the surface. It also wastes productive time. Each tool-material combination has a minimum practical feed.
Aprender