Dill sizes

Seeed Services Fusion PCB/ PCBA Services
#1

Hy all,

somebody know what is the standard sizes for drills?
The drc check not accept 0.3mm drills, only 0.3048mm it’s OK?
It’s allowed to modify the drill.txt manually?
My eagle generate 16 tools T01-T16 i think it’s too much, 5 it’s have to be enough!
Example:
T06C0.0315
T07C0.0320
T08C0.0354
T09C0.0360
This sizes almost equal so i want to change to be easiest to manufacture!
Or the drill.txt processed,rounded/replaced automatically, so i don’t have to worry about??

Thanks.

#2

I wouldn’t worry about it. Board manufacturers round drills off to the nearest value.

I’d have thought that 0.3 mm would be accepted. The DRC parameter must be wrong.

#3

please don’t worry about it.
PS: the minimum drilling hole must be 0.3mm.