Commonly Used Charts for CNC Machinists

These helpful charts are so often used by machinists that one of our certified technicians put them together on one page for our customers. SEE BELOW PDF LINK or call us to get a card sent to you.

Surface Feet Per Minute (SFPM)
=RPM x.262 x Tool Diameter

Revolutions per Minute
=SFPM x 3.82 / Tool Diameter

Feed Rate (Inches per minute)
=RPM x Chip Load per Tooth x # of Flutes

Chip Load per tooth
=Inches per Minute / RPM / # of Flutes

cnc machinists charts – CLICK HERE!!!

fractional chart
drill chart
fractional drill chart
drill sizes
drill tap chart/sizes
sfm for turning
surface footage for lathe
sfm calculator/formula
chip load calculator
chip per tooth calculator
how to calculate sfm from spindle speed
sfm for milling
chip load for endmills