What Are the Typical Sizes for Hole Drilling?

When it comes to standard drill specifications for printed circuit boards (PCBs), there is a wide array of choices available. Manufacturers utilize various
options for both hollow and piercing sizes, making it possible to find the most suitable one through
careful research. The following list outlines key considerations that should be factored into the PCB
selection process.

PCB Via Drill Sizes

Because the dimensions used in PCBs can differ among suppliers and manufacturers, there isn’t a
universally accepted standard size for board vias in PCB production. Additionally, many drill sizes are
preferred by PCB manufacturers, which they categorize as standard sizes.

Notably, one of the largest common drill sizes is approximately 0.6 mm. While PCB manufacturers have
their own systems for via sizing during drilling, they often adhere to these standard lengths.

It’s important to understand that vias can be viewed as overlapping drills and layered holes in
practical terms. As a result, manufacturers are capable of producing a comprehensive range of commonly
used drilling dimensions for PCBs. However, if multiple boards feature vias of identical dimensions,
optimizing the drilling process may be advisable.

Why is this significant? Having uniform via sizes can streamline the drilling process and reduce
complexity. You can achieve vias with a minimum diameter of around 0.15 mm and pads measuring 0.3 mm or
more; furthermore, there’s flexibility regarding maximum drill lengths depending on your needs.

With various design options available for boards today, you no longer need to select via types and sizes
without considering their impact on other components within the design and enhancement phases.
Production feasibility should always be prioritized because even the most innovative design cannot
succeed if it cannot be manufactured effectively.