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G85 Boring cycle, feed out
Centroid CNC12 Acorn G-code · Mill, Lathe
On mills: Boring cycle, feed out
Feeds to Z and feeds back out to R. Used for reaming and boring, and with reversing tap heads such as Tapmatic NCR.
Format
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R | R plane |
F | Feed rate in and out |
How it works
Modal, canned cycle. Cancel with G80.
Example program
T1 M6 ; LOAD TOOL 1, Z GOES HOME FIRST
G54 G0 X0 Y0 ; WORK OFFSET 1
S500 M3
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- For a reversing tap head, lock overrides with M109 before the cycle and restore with M108 after.
On lathes: Boring cycle, feed out
Feeds to depth and feeds back out at the same feed. Used for reaming on center.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
Addresses
| Address | What it does |
|---|---|
X | X position |
Z | Depth |
R | Return point |
F | Feed in and out |
How it works
Modal, canned cycle. Cancel with G80.
Example program
G97 S400 M3
G0 X0 Z.2 M8
G85 X0 Z-1. R.1 F.006 ; REAM, FEED OUT
…
The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- The lathe manual gives only a short description. Graph it before the first run.
Related codes
G85 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Boring cycle, feed out |
| Haas NGC | Boring cycle, feed in and feed out |
| Mazak (EIA) | Reaming cycle |
| Okuma OSP | Boring cycle, feed out |
| Mitsubishi M70 M80 | Boring cycle, feed out |
| Brother Speedio | Boring cycle feed out |
| Fagor 8055 8065 | Reaming canned cycle |
| LinuxCNC Tormach | Boring cycle, feed out |
| Mach3 Mach4 | Bore, feed out |
| Hurco WinMax (NC) | Boring, feed in and feed out |
| Fadal | Bore in, bore out |
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