CNC Machinist Calculator UltraG72 Stock removal in facing, rough cycle
Fanuc G-code · Lathe
Roughs the profile between P and Q with passes along X, like G71 but facing. Best for large faces and short parts with big steps.
Format
G72 W R then G72 P Q U W F [S T]
Addresses
| Address | What it does |
|---|---|
W (first block) | Depth of cut per pass in Z |
R (first block) | Retract amount after each pass |
P | First profile block number |
Q | Last profile block number |
U (second block) | X finish stock, diameter value |
W (second block) | Z finish stock |
F | Roughing feed |
How it works
Non-modal.
Example program
T0101 (FACING ROUGH TOOL)
G50 S2000 (MAX RPM)
G96 S450 M03 (CSS)
G00 X3.1 Z.1 M08 (CYCLE START POINT)
…
G50 S2000 (MAX RPM)
G96 S450 M03 (CSS)
G00 X3.1 Z.1 M08 (CYCLE START POINT)
…
The full 10-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- The first profile block may move only Z for type I.
- Write the profile from the large diameter toward center, the direction the tool travels.
- Finish with G70 P Q.
Related codes
G72 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Haas NGC | Bolt holes along an angle |
| Mazak (EIA) | Facing roughing cycle, X direction |
| Okuma OSP | Compound thread cycle, transverse |
| Mitsubishi M70 M80 | Face rough cutting cycle |
| Heidenhain TNC (ISO) | Scaling factor |
| Fagor 8055 8065 | Scaling factor |
| LinuxCNC Tormach | Lathe roughing cycle, facing along X |
| Centroid CNC12 Acorn | Rough facing cycle |
| Swiss (Citizen Star) | Rough facing cycle |
Every G-code for Fanuc in your pocket. The app has the full example programs, search by number or shop word, a line decoder and calculators for tapping, threading and drilling.
Open G72 in the app All Fanuc G-codes