G81 is the simplest canned drilling cycle: rapid to the hole, feed straight to depth, then rapid retract. It repeats automatically at every X Y position you list until cancelled, which keeps programs short.
Format
G81 X__ Y__ Z__ R__ F__
How it works
- Z is the final hole depth; R is the retract (clearance) plane above the part.
- Each following X Y line drills another hole with the same cycle.
- G80 cancels the cycle.
Example
G81 Z-0.5 R0.1 F5.0
X1.0
X2.0
G80
X1.0
X2.0
G80
Related: G83 peck drilling, G84 tapping, and the Tap Drill Chart.