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G87 Boring cycle, stop and manual retract
Haas NGC G-code · Mill
Feeds to the bottom, stops the spindle, and waits for the operator to jog the tool out. Listed on older Haas controls.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
G87 X Y Z R F
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R | R plane |
F | Feed rate |
How it works
Modal, canned cycle group 09. Cancel with G80.
Example program
G90 G54 G00 X0. Y0. S900 M03 (BORE CENTER)
G43 H07 Z1. (APPROACH)
G87 G98 Z-1. R.1 F5. (BORE, STOP, WAIT FOR MANUAL RETRACT)
G80 (CANCEL)
G43 H07 Z1. (APPROACH)
G87 G98 Z-1. R.1 F5. (BORE, STOP, WAIT FOR MANUAL RETRACT)
G80 (CANCEL)
Example is in inch. Check offsets and clearances first.
Watch out for
- The operator must retract the tool before restarting. Not listed for current NGC mills, check your manual.
Related codes
G87 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Back boring cycle |
| Mazak (EIA) | Side drilling cycle, live tool |
| Okuma OSP | Back boring cycle |
| Mitsubishi M70 M80 | Back boring cycle |
| Brother Speedio | Back boring cycle |
| Fagor 8055 8065 | Rectangular pocket canned cycle |
| LinuxCNC Tormach | Back boring cycle, not implemented |
| Mach3 Mach4 | Back boring |
| Hurco WinMax (NC) | Back bore (ISNC) or chip breaker (BNC) |
| Fadal | Bore in and out, Fadal G87 |
| Swiss (Citizen Star) | Side drilling cycle |
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