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G86 Boring cycle, spindle stop / LAP copy turning rough cycle
Okuma OSP G-code · Mill, Lathe
On mills: Boring cycle, spindle stop
Bores to depth, stops the spindle and rapids out. The tool leaves a line in the bore.
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 Y | Hole position |
Z | Bore depth |
R | R point |
F | Feed rate |
How it works
Modal, fixed cycle group. Cancel with G80.
Example program
N1 G15 H1 (WORK COORDINATE SYSTEM 1)
N2 T8 M06 (ROUGH BORING BAR)
N3 G00 G90 X2. Y1. S800 M03 (BORE CENTER)
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Use G76 when the drag line is not allowed.
On lathes: LAP copy turning rough cycle
Roughs by following the contour shape in offset passes. Good for forgings and castings that already have the rough shape.
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 |
|---|---|
Nname | Sequence name of the first contour block |
D | Depth of cut |
F | Feed rate |
U | Finish stock in X |
W | Finish stock in Z |
How it works
Cycle call. One shot.
Example program
N2 G00 X3.5 Z.2 T010101 (ROUGH TOOL)
N3 G96 S500 M03 (500 SFM)
N4 G86 NAT01 D.15 F.012 U.02 W.005 (COPY ROUGH, ADDRESSES TO VERIFY)
…
The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- On bar stock copy turning wastes air cuts. Use G85.
- Okuma G86 is like Fanuc G73 pattern repeat.
Related codes
G86 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Boring cycle, spindle stop |
| Haas NGC | Boring cycle, spindle stop and rapid out |
| Mitsubishi M70 M80 | Boring cycle, spindle stop out |
| Brother Speedio | Boring cycle spindle stop |
| Fagor 8055 8065 | Boring, rapid withdrawal |
| LinuxCNC Tormach | Boring cycle, spindle stop, rapid out |
| Mach3 Mach4 | Bore, spindle stop, rapid out |
| Hurco WinMax (NC) | Bore rapid out (ISNC) or bore orient (BNC) |
| Fadal | Bore in, spindle off, rapid out |
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