CNC Machinist Calculator UltraM41 Low gear range
Fanuc M-code · Mill and lathe
Selects the low spindle gear range on machines with a gearbox, for more torque at low RPM.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
M41
How it works
Stays until another gear range.
Example program
M05 (SPINDLE STOP)
M41 (LOW GEAR, BUILDER CODE)
G97 S300 M03 (LOW RPM ROUGHING)
M41 (LOW GEAR, BUILDER CODE)
G97 S300 M03 (LOW RPM ROUGHING)
Example is in inch. Check offsets and clearances first.
Watch out for
- Many machines pick the gear from S automatically. Machines without a gearbox ignore it or alarm.
Related codes
M41 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Haas NGC | Spindle low gear override |
| Okuma OSP | Spindle gear range 1 |
| Siemens 840D 828D | Gear stage selection M40 to M45 |
| Fagor 8055 8065 | Spindle gear range 1 |
| Centroid CNC12 Acorn | Select low gear range, macro |
| Hurco WinMax (NC) | Single touch probing |
| Fadal | Low range RPM |
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Open M41 in the app All Fanuc M-codes