The random orbital sander: Dust

Sanding dust: unhealthy and annoying at all

Wood dust in the lungs is unhealthy. That is why you should be sure to vacuum the dust. Connection to a vacuum cleaner is better than a simple collection bag. And to ensure that the suction works, please make sure that the machine, sanding disc and paper really have the appropriate holes and fixtures. The suction works better when the holes in the paper and sanding disc are properly aligned. There are also sanding discs with very many holes, which facilitates suction.

If you use abrasive grids, the suction is usually better.

Good suction also slows clogging of the paper/grid.

Many holes suck a lot

Fig: Many holes suck a lot