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G81 Drill Cycle Example (G81ZnFn)
See also G83: Peck Drill Cycle

Zn: Depth of hole to be drilled
Fn: Feed rate, IPR or IPM

G81 is a one shot command.
It is used to feed to a drill to a certain depth, then rapid back to the starting point.
Image of G81 Drill Cycle

To drill a hole .250” deep at a feed of .005” per revolution:
Image of G81 Drill Cycle Program
Back to G-Codes