CNC Machinist Calculator UltraG85 Boring cycle, feed out / Face boring cycle
Fanuc G-code · Mill, Lathe
On mills: Boring cycle, feed out
Feeds to Z and feeds back out to the R plane with the spindle running. Used for reaming and boring where a rapid exit could mark the wall.
Format
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R | R plane where feed starts |
F | Feed rate in and out |
K | Number of repeats |
How it works
Modal, group 09. Cancel with G80 or any group 01 code.
Example program
G90 G54 G00 X1. Y1. S600 M03 (FIRST HOLE)
G43 H07 Z1. M08 (CLEARANCE)
G99 G85 Z-.8 R.1 F6. (REAM IN AND OUT)
…
The full 6-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Feeding out doubles the time in the hole. Fine for reamers.
- There is no dwell. Use G89 for a dwell at the bottom.
On lathes: Face boring cycle
Feeds in along Z and feeds back out on the face, like a reaming pass. Used with a live tool for bores and reamed holes.
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 C | Hole position, X as a diameter, C as an angle |
Z | Hole bottom |
R | R point |
P | Dwell at the bottom |
F | Feed |
K | Repeat count |
How it works
Modal, group 10. Cancel with G80.
Example program
G98 (FEED PER MINUTE)
G00 X1.5 C0 Z.2 M08 (FIRST HOLE)
G85 Z-.5 R-.1 F8. (REAM)
…
The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Feeding out gives a good finish for reaming.
- R is often the distance from the start point to the R point, not an absolute Z. Check on your machine.
- Cancel with G80 when done.
Related codes
G85 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| 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 |
| Centroid CNC12 Acorn | Boring cycle, feed out |
| Hurco WinMax (NC) | Boring, feed in and feed out |
| Fadal | Bore in, bore out |
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