How this calculation works
Feed per tooth describes programmed table advance for each effective cutting edge. Multiplying it by effective flute count and RPM converts that input into table feed. It is not interchangeable with feed per revolution or a measured maximum chip thickness.
RPM = min(1000vc/(πD), ceiling); table feed = RPM × effective flutes × programmed feed/tooth; removal cm³/min = width × depth × feed/1000A worked example
At the entered 2000 rpm ceiling, four flutes at 0.05 mm/tooth produce 400 mm/min of table feed. The actual surface speed of a 10 mm cutter is about 62.832 m/min. A five-by-two-millimetre cut section then removes four cubic centimetres per minute. A one-metre cutting path takes 2.5 ideal minutes, with no allowance for non-cutting motion.
Good to know
Constant programmed feed and rectangular removal volume only; no chip-thinning, ball-nose diameter inference, cutting-force, power or safe-feed recommendation. Supply cutting data from the relevant manufacturer and validate the actual setup. Machine ratings, tool overhang and workholding cannot be established by this arithmetic conversion.
Reference: Sandvik Coromant — milling formulas and definitions (opens in a new tab) ↗
What this model answers
Feed per tooth describes programmed table advance for each effective cutting edge. Multiplying it by effective flute count and RPM converts that input into table feed. It is not interchangeable with feed per revolution or a measured maximum chip thickness.
The page applies the entered spindle limit first, then derives table feed, removal rate and travel time from the resulting RPM. A cap therefore affects several downstream quantities consistently.
The Turning cutting speed feed and time calculator uses a rotating workpiece with feed per revolution. This milling model uses effective cutter flutes and feed per tooth, so equal numeric feed entries do not imply equal motion.
Measure the right inputs
Use effective cutting diameter and the effective flute count for the intended operation. A ball-nose or unusual engagement can require a diameter different from the tool’s nominal outside size.
Radial width cannot exceed entered effective diameter in this rectangular-cut model. Axial depth, width and path describe a constant cut. The page does not automatically apply radial chip-thinning compensation or infer engagement angles.
Read the result in context
Removal rate is the rectangular cut cross-section times table feed, converted from cubic millimetres to cubic centimetres per minute. It assumes that cross-section is present along the cutting path.
Ideal path time excludes rapid moves, ramps, acceleration and tool changes. A finite result does not certify chatter resistance, workholding, available spindle power or a safe chip load. Those require operation-specific engineering and toolmaker data.
Work through the numbers
At the entered 2000 rpm ceiling, four flutes at 0.05 mm/tooth produce 400 mm/min of table feed. The actual surface speed of a 10 mm cutter is about 62.832 m/min.
A five-by-two-millimetre cut section then removes four cubic centimetres per minute. A one-metre cutting path takes 2.5 ideal minutes, with no allowance for non-cutting motion.
Where the model stops
Constant programmed feed and rectangular removal volume only; no chip-thinning, ball-nose diameter inference, cutting-force, power or safe-feed recommendation.
Supply cutting data from the relevant manufacturer and validate the actual setup. Machine ratings, tool overhang and workholding cannot be established by this arithmetic conversion.
A few questions, answered
Is programmed chip load actual chip thickness?
Not necessarily. Engagement and geometry can change chip thickness; this page does not compensate for those effects.
What happens when the spindle cap binds?
Actual surface speed falls, and table feed and removal rate are recalculated from the capped RPM.