0.005 length/tooth is the example result. Read it using the units and relationship stated below.
CNC Chip Load per Tooth uses feed rate, spindle speed (rpm), flutes.
Keeping feed calculations attached to the cutting conditions
For cnc chip load per tooth, the relationship is Result = (([Feed rate]) ÷ ([Spindle speed (RPM)] × [Flutes])). The amount depends on the supplied feed rate, spindle speed (rpm), rather than a live market price or a value imported from another record. A machining relationship connects diameter, speed, feed and engagement. It does not choose a safe starting point without the cutter, material and setup. Manufacturer cutting data should provide the process assumptions used in the form.
What the model includes
Result = (([Feed rate]) ÷ ([Spindle speed (RPM)] × [Flutes])) Keep millimetres and metres distinct, and record whether feed is per tooth, per revolution or per minute. A correct conversion can still be unsuitable when tool reach, workholding, machine limits or chip evacuation changes. Use the result as a conversion or comparison, then validate the process against the tool guidance and machine capability. This page does not replace a tested setup sheet or account for every cutting condition.
Example with the supplied inputs
Feed rate: 80; Spindle speed (RPM): 8000; Flutes: 2. Result: 0.005 length/tooth. The values are illustrative.
Compare one changed input
Feed rate changes from 80 to 88. The result becomes 0.0055 length/tooth. All other inputs remain fixed.
Calculation rule
Result = (([Feed rate]) ÷ ([Spindle speed (RPM)] × [Flutes]))
Inputs and output
| Input | Example value | Entry convention |
|---|---|---|
| Feed rate | 80 | Use the source quantity represented by feed rate. Keep the counted population fixed and avoid mixing a unit value with a period total. |
| Spindle speed (RPM) | 8000 | Measure spindle speed (rpm) in the displayed unit. Convert the source measurement before entry if it uses another system; a changed label does not perform a unit conversion. |
| Flutes | 2 | Use the source quantity represented by flutes. Keep the counted population fixed and avoid mixing a unit value with a period total. |
Output: 0.005 length/tooth is the example result. Read it using the units and relationship stated below. Unit: length/tooth.
How to use the page
Collect the inputs
Gather Feed rate, Spindle speed (RPM), Flutes. Use one period and the units shown in the form.
Run the calculation
Enter the values and select the action. The calculation rule above explains how the inputs produce the result.
Compare a scenario
Change Feed rate on its own, keeping the other inputs fixed. Read both results before changing another assumption.
Worked example
With the example inputs listed above, the result is 0.005 length/tooth.
Change Feed rate from 80 to 88 while keeping every other value fixed. The result becomes 0.0055 length/tooth. This comparison isolates that input; it does not forecast how other variables will respond.
Check the stated formula, units and limits before using the result in a decision.
Keep the displayed formula, input units and model scope with the result. Corrections or questions can be sent through the request section on this page.
Content updated: October 11, 2026