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G21 command sets distance unit to millimeters (mm).
G21 command is modal.
G21 is included in the modal group 6 (Units) ( G20, G21).
Example for CNC (G-code) G21 command:
G21; Input in millimeters (mm)
A table for quickly
converting lengths in millimeters to inches (inches are recorded as fractions).
|
Millimeters (mm) |
Inches (in) |
|
3,175 |
1/8" |
|
4,762 |
3/16" |
|
6,35 |
1/4" |
|
7,938 |
5/16" |
|
9,525 |
3/8" |
|
12,7 |
1/2" |
|
15,505 |
5/8" |
|
19,05 |
3/4" |
|
22,225 |
7/8" |
|
25,4 |
1" |
|
31,75 |
1 1/4" |
|
38,1 |
1 1/2" |
|
44,45 |
1 3/4" |
|
50,8 |
2" |
|
57,15 |
2 1/4" |
|
63,5 |
2 1/2" |
|
69,85 |
2 3/4" |
|
76,2 |
3" |
|
82,55 |
3 1/4" |
|
88,9 |
3 1/2" |
|
101,6 |
4" |
|
114,3 |
4 1/2" |
|
127 |
5" |
|
139,7 |
5 1/2" |
|
152,4 |
6" |
|
165,1 |
6 1/2" |
|
177,8 |
7" |
|
190,5 |
7 1/2" |
|
203,2 |
8" |
|
215,9 |
8 1/2" |
|
228,6 |
9" |
|
241,3 |
9 1/2" |
|
254 |
10" |
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CNC G-codes.G21 command - Programming in millimeters (mm)