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G20 command sets distance unit to inches.

G20 command is modal.
G20 is included in the modal group 6 (Units) (G20, G21).

 

Example for CNC G20 command:  

G20; Input in inches 

 

The standard lengths in inches, presented as ordinary fractions, and their values in millimeters are shown in the table below.

Inches (in) Millimeters (mm)
1/8" 3,175
3/16" 4,762
1/4" 6,35
5/16" 7,938
3/8" 9,525
1/2" 12,7
5/8" 15,875
3/4" 19,05
7/8" 22,225
1" 25,4
1 1/4" 31,75
1 1/2" 38,1
1 3/4" 44,45
2" 50,8
2 1/4" 57,15
2 1/2" 63,5
2 3/4" 69,85
3" 76,2
3 1/4" 82,55
3 1/2" 88,9
4" 101,6
4 1/2" 114,3
5" 127
5 1/2" 509,7
6" 152,4
6 1/2" 165,1
7" 177,8
7 1/2" 190,5
8" 203,2
8 1/2" 215,9
9" 228,6
9 1/2" 241,3
10" 254

 

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