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G86 Boring cycle, spindle stop out

Mitsubishi M70 M80 G-code · Mill

Feeds to Z, stops the spindle, and rapids out.

Format

G86 X Y Z R P F

Addresses

Address	What it does
`X Y`	Hole position
`Z`	Hole bottom
`R`	R plane
`P`	Dwell
`F`	Feed rate

How it works

Modal, canned cycle group 09. Cancel with G80.

Example program

G90 G54 G00 X1. Y1. S600 M03 (BORE START)
G43 H10 Z1. (LENGTH COMP)
G98 G86 Z-1. R.1 F4. (ROUGH BORE)
G80 G00 Z1. (CANCEL)

Example is in inch. Check offsets and clearances first.

Watch out for

Leaves a drag line on the bore wall. Use G76 for a clean finish.
The spindle restarts at the next hole.

Related codes

G76 · G80

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
Okuma OSP	Boring cycle, spindle stop
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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