G86 Boring cycle spindle stop

Brother Speedio G-code · Mill

Feeds to Z, stops the spindle and rapids out. Leaves a light line in the bore.

Format

G86 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. Cancel with G80.

Example program

G100 T08 G90 G54 G00 X1. Y1. G43 H08 Z1. S1200 M03 (ROUGH BORE)
G98 G86 Z-.75 R.1 F5. (BORE)
G80 G00 Z1. (CANCEL)

Example is in inch. Check offsets and clearances first.

Watch out for

The spindle restarts at the R or initial point. Use G76 for a clean finish.

Related codes

G76 · G85 · 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
Mitsubishi M70 M80	Boring cycle, spindle stop out
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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