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G81 Drill or spot drill cycle
Hurco WinMax (NC) G-code · Mill
Feeds to Z bottom and rapids out. Basic drilling and spot drilling cycle.
Format
G81 X Y Z R F [K or L]
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R | R plane |
F | Feed rate |
K or L | Repeats, 1 to 6 |
How it works
Modal, group 09. Cancel with G80.
Example program
T2 M06 (.201 DRILL)
G90 G54 G00 X1. Y1. S2500 M03 (FIRST HOLE)
G43 H02 Z1. M08 (LENGTH OFFSET)
G99 G81 Z-.6 R.1 F10. (DRILL)
…
G90 G54 G00 X1. Y1. S2500 M03 (FIRST HOLE)
G43 H02 Z1. M08 (LENGTH OFFSET)
G99 G81 Z-.6 R.1 F10. (DRILL)
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- ISNC: Z is absolute in G90 and R must be given. Basic NC: Z is a positive incremental depth.
- Canned cycles do not start the spindle. Give M03 first.
Related codes
G81 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Drilling cycle |
| Haas NGC | Drill canned cycle |
| Mazak (EIA) | Drilling cycle, spot drill |
| Okuma OSP | Drill or spot cycle |
| Mitsubishi M70 M80 | Drilling cycle |
| Brother Speedio | Drilling cycle |
| Fagor 8055 8065 | Drilling canned cycle |
| LinuxCNC Tormach | Drill cycle |
| Mach3 Mach4 | Drill cycle |
| Centroid CNC12 Acorn | Drilling cycle |
| Fadal | Drill, spot drill |
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Open G81 in the app All Hurco WinMax G-codes