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G88 Bore, manual retract
Mach3 Mach4 G-code · Mill
Feeds to Z, dwells, stops the spindle and pauses. The operator jogs the tool out, then presses Cycle Start.
Format
G88 X Y Z R [P] [L] F
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Bore bottom |
R | Retract plane |
P | Dwell in seconds |
F | Feed rate |
How it works
Modal, canned cycle group. Cancel with G80.
Example program
G0 G20 G90 G54 G17 G40 G49 G80 (SAFE START, INCH)
T4 M6 (BORING BAR)
S1200 M3 (SPINDLE ON)
G0 X1.0 Y-1.0 (HOLE)
…
T4 M6 (BORING BAR)
S1200 M3 (SPINDLE ON)
G0 X1.0 Y-1.0 (HOLE)
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Only jog Z up and do not move XY in the hole.
- Each hole stops for the operator.
Related codes
G88 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Boring cycle, manual retract |
| Haas NGC | Boring cycle, dwell and manual retract |
| Mazak (EIA) | Side tapping cycle, live tool |
| Okuma OSP | LAP continuous thread cutting cycle |
| Mitsubishi M70 M80 | Boring cycle, manual retract |
| Brother Speedio | Boring cycle with manual retract |
| Fagor 8055 8065 | Circular pocket canned cycle |
| LinuxCNC Tormach | Boring cycle, manual out, not implemented |
| Hurco WinMax (NC) | Rigid tap (BNC) or bore manual out (ISNC) |
| Fadal | Bore in, dwell, bore out |
| Swiss (Citizen Star) | Side tapping cycle |
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Open G88 in the app All Mach3 Mach4 G-codes