M-codes used in CNC

M-Codes

List of Miscellaneous codes used in CNC Milling and Turning

M00 - Program stop; 
(Mill and Lathe)

M01 - Optional program stop; 
(Lathe and Mill)

M02 - Program end; 
(Lathe and Mill)

M03 - Spindle on clockwise; 
(Lathe and Mill)

M04 - Spindle on counterclockwise; 
(Lathe and Mill)

M05 - Spindle off; 
(Lathe and Mill)

M06 - Automatic Tool change; 
(Mill)

M08 - Coolant on; 
(Lathe and Mill)

M09 - Coolant off; 
(Lathe and Mill)

M10 - Chuck or rotary table clamp; 
(Lathe and Mill)

M11 - Chuck or rotary table clamp off; 
(Lathe and Mill)

M19 - Orient spindle; 
(Lathe and Mill)

M30 - Program end, return to start; 
(Lathe and Mill)

M97 - Local sub-routine call; 
(Lathe and Mill)

M98 - Sub-program call; 
(Lathe and Mill)

M99 - End of sub program; 
(Lathe and Mill)