G74.1 Left hand rigid tap

Fadal G-code · Mill

Rigid taps a left hand thread. Run G74.2 first to set up the spindle for rigid tapping.

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

Format

G74.1 X Y Z R0 F

Addresses

Address	What it does
`Z`	Tap depth
`R0`	R0 plane where feed starts. Must be at or below the start plane
`F`	Feed, lead times RPM

How it works

Modal fixed cycle. Cancel with G80.

Example program

N1 G0 G40 G49 G80 G90 G17 (FORMAT 2 SAFE START)
N2 T6 M6 (.250-20 LH TAP)
N3 G0 G90 G54 X1. Y1. S400 (RPM FOR TAP)
N4 G43 H6 Z1. M8
…

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

Watch out for

Program G74.2 before G74.1.
Feed must equal lead times RPM exactly.

Related codes

G74.2 · G84.1 · G80

Every G-code for Fadal 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 G74.1 in the app All Fadal G-codes

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