Taylor Tool Life Calculator
Tool Life 1:
Speed 1 = 300
Tool Life @ Speed 1 = 10
Tool Life 2:
Speed 2 = 200
Tool Life @ Speed 2 = 50
Calculate 'n' and 'C'
C [sfpm@1min. tool life] =
If speed changes to:
Speed 3 =
New Tool Life =
Req'd Speed for Desired Tool Life:
Desired Tool Life =
New Speed =
A milling or lathe (turning) machine tool will last for a certain amount of time under specific conditions. The largest factor affecting the life of a tool is the speed at which the cutter is being driven through the material.
The speed is measured in units if surface feet per minute. On a lathe, the rpm of the work piece (material being cut) is adjusted based on its diameter. For a mill, the rpm of the tool is adjusted based on the diameter of the cutting tool to reach the correct surface speed. A smaller tool must spin faster than a larger tool for a given surface speed.
The Taylor's Equation for Tool Life Expectancy provides a good approximation for how long a milling or turning tool will last.
A general form of the equation is
V=cutting speed (sfpm)
T=tool life (min.)
C=cutting speed for 1 minute tool life
n and C are constants found by experimentation or published data; they are properties of tool material, workpiece and feed rate.
To find n and C for a given machining and material condition, measure tool life at one speed, and then measure tool life for a second speed. Enter the values into this calculator.
Make sure you push all the equal signs to update the calculation each time you make a change.
Contributed by jeffsowden
Say, at a speed of 300 sfpm, tool life is 10 minutes and at the speed of 200 sfpm, tool life is now 50 minutes.
Enter these values to see what the n and C values are. Enter a new speed for speed 3 to see what the new tool life is.
Or enter a new time for Desired Tool Life and see what the required speed is for that tool life.
Tool Life @ Speed 1
Tool Life @ Speed 2
C [sfpm@1min. tool life]
New Tool Life
Desired Tool Life