Set Up Drilling
Enter the drill diameter and the recommended cutting speed in SFM.
Drill Speed Calculator
Calculate drill spindle RPM from drill diameter and cutting speed.
Metrik MFG / DrillingREADY
Drill Speed Calculator
INPUTVALUEOUTPUT
Primary input01
Process setting02
Calculated output03
CALCULATION STATUSREADY TO CALCULATEEnter values below to generate results
STANDARD MODE
READY TO CALCULATE
Drill Speed Calculator
Advanced Engineering
PRACTICAL CONTEXT
Using the result in real shop work
This drill-speed calculation converts a target surface speed into a spindle speed based on drill diameter.
Where This Result Helps
Use it as a starting point when programming drilling operations, then verify the final value against the drill maker data and material.
What Can Distort the Result
Using nominal machine speed without checking drill diameter, mixing units, or using a cutting speed that does not match the drill material and workpiece.
ENGINEERING METHOD
How the drilling calculation works.
FORMULARPM = 3.82 × SFM ÷ drill diameter.
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