Printed from Kezuriba (kezuriba.net/en/nc/m04/)

M04

Machining center, Lathe

Spindle on, counterclockwise (CCW)

⌨Format and notes

S_ M04

Left-hand (reverse) tapping (G74) cuts in with the spindle in reverse
Most M-codes are assigned by the machine builder (Siemens ISO: M00–M89 are defined by the machine tool builder). Always check the machine's operator's manual

The meaning shown agrees in at least two sources (agreement confirmed). Explanations are written in our own words.

Mitsubishi Electric — The Basics of CNC Machining Programming (for Machining center) e-Learning material (PDF) mitsubishielectric.com
Mitsubishi Electric — The Basics of CNC Machining Programming (for Lathe) e-Learning material (PDF, BNP-C8027-688) mitsubishielectric.com
Haas Automation, Inc. — Mill Operator's Manual – 18 Mill M-Codes (online version) haascnc.com
Haas Automation, Inc. — Lathe Operator's Manual – 17 Lathe M-Codes (online version) haascnc.com
National Institute of Standards and Technology (NIST), USA — The NIST RS274NGC Interpreter – Version 3 (NISTIR 6556, 2000) nvlpubs.nist.gov
Ministry of Health, Labour and Welfare (MHLW), Human Resources Development Bureau, Office of the Councillor for Skills Evaluation — Human resource development manual using the practical exam tasks of the Grade 3 Skilled Worker Test: CNC lathe work (March 2018) waza.mhlw.go.jp