Enter the spindle RPM, the chip load (per tooth), and the number of teeth into the Feed Rate Calculator. The calculator will evaluate the Feed Rate.
Feed Rate Formula
The following formula is used to calculate the Feed Rate.
FR = RPM * CL * T
- Where FR is the Feed Rate (in/min or mm/min)
- RPM is the spindle speed (rev/min)
- CL is the chip load per tooth (in/tooth or mm/tooth)
- T is the number of teeth (flutes)
To calculate the feed rate, multiply the spindle RPM, chip load (per tooth), and number of teeth together.
How to Calculate Feed Rate?
The following two example problems outline the steps and information needed to calculate the Feed Rate.
Example Problem #1
- First, determine the spindle RPM.
- The spindle RPM is calculated to be: 500 rev/min.
- Next, determine the chip load.
- The chip load is measured to be: 0.003 in/tooth.
- Next, determine the number of teeth.
- The number of teeth is found to be: 4.
- Finally, calculate the Feed Rate using the formula above:
FR = RPM * CL * #T
The values provided above are inserted into the equation below and computed.
FR = 500 * 0.003 * 4 = 6 (in/min)
Example Problem #2
The variables required for this problem are provided below:
spindle RPM = 600 rev/min
chip load = 0.005 in/tooth
number of teeth = 4
Test your knowledge using the equation and check your answer with the calculator.
FR = RPM * CL * #T = 600 * 0.005 * 4 = 12 (in/min)
