How do you drill holes? Or: Which drills you use?

ℹ️Help Zone Beautiful Boards
1

Hi Aisler Team,

I would like to standardize my footprint library and have seen that I have many holes for pads in the sizes 0.7mm to 0.9mm.

After the last order I went to my stock with an empty PCB and realized that for me a hole for a pad should ideally have a diameter of 0.85mm.

In order not to complicate production unnecessarily, I wanted to know in advance whether you mill holes with, for example, a 0.2mm milling cutter or whether you use drills in 0.05mm steps.

If you mill every hole anyway, 0.85mm would be fine. However, if you only use drills in 0.1mm increments, the 0.85mm dimension would probably be rounded up. If you have both options (milling holes or using ready-made drill bits), it would be helpful for me to know which drill bit sizes are available.

Thanks,
Robert

2

Hi Robert :wave:

We provided a documentation article regarding this topic. Plated and Non-Plated Holes

For holes below 2mm diameter, we have tools in steps of 0.05mm, the diameter in your design files will be interpreted as the final hole diameter, to compensate for the copper thickness we will drill with a 0.1mm larger drill for ENIG boards and 0.15mm for HASL boards.

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3

As usual I saw the Article, but stopped reading after the table :upside_down_face:

Thanks for quick reply,
Robert

€dit: And the 0.05mm steps are very nice! That fits to my PCBs very good!

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