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G72 Compound thread cycle, transverse
Okuma OSP G-code · Lathe
Cuts a face thread in many passes from one block, moving in X. Same idea as G71 turned 90 degrees.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
G72 X Z D H F [B] [U] [K or A] [L] [J] [M] [Q]
Addresses
| Address | What it does |
|---|---|
X | Thread end point in X |
Z | Final Z depth of the thread |
D | First pass depth of cut |
H | Thread height |
F | Thread lead |
B | Infeed angle |
U | Finish allowance |
How it works
Compound fixed cycle. One shot.
Example program
O2000 (OKUMA LATHE SAMPLE)
N1 G50 S3000 (MAX SPINDLE 3000 RPM)
N2 G00 X3.2 Z.2 T070707 (FACE THREAD TOOL)
N3 G97 S300 M03 (300 RPM)
…
N1 G50 S3000 (MAX SPINDLE 3000 RPM)
N2 G00 X3.2 Z.2 T070707 (FACE THREAD TOOL)
N3 G97 S300 M03 (300 RPM)
…
The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Rare on most jobs. Prove it in the graphics.
- Check whether H and D are radius or diameter for the face direction on your control.
Related codes
G72 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Stock removal in facing, rough cycle |
| Haas NGC | Bolt holes along an angle |
| Mazak (EIA) | Facing roughing cycle, X direction |
| 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 |
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