G88 LAP continuous thread cutting cycle

Okuma OSP G-code · Lathe

Cuts threads along a contour defined with G81, such as two threads in a row, using one call.

Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.

Format

G88 Nname D H [B] [U] [W]

Addresses

Address	What it does
`Nname`	Sequence name of the thread contour
`D`	First pass depth of cut
`H`	Thread height, must be more than U or W
`B`	Tool tip angle
`U W`	Finish stock in X and Z

How it works

Cycle call. One shot.

Example program

N1 G50 S2000 (MAX 2000 RPM)
N2 G00 X1. Z.3 T070707 (THREAD TOOL)
N3 G97 S600 M03 (600 RPM)
N4 G88 NAT04 D.02 H.1227 B60 U.004 (CONTINUOUS THREAD)
…

The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.

Watch out for

M32, M33 and M34 pick straight or zigzag infeed. M32 is the default.
For a single thread G71 is simpler.

Related codes

G71 · G81 · G80

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
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
Mach3 Mach4	Bore, manual retract
Hurco WinMax (NC)	Rigid tap (BNC) or bore manual out (ISNC)
Fadal	Bore in, dwell, bore out
Swiss (Citizen Star)	Side tapping cycle

Every G-code for Okuma OSP in your pocket. The app has the full example programs, search by number or shop word, a line decoder and calculators for tapping, threading and drilling.

Open G88 in the app All Okuma OSP G-codes

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