Posted By Alan Spiers I believe MMMF dust it classed as nuisance dust,so the odd hole with dust not falling directly into the face would not be regarded as a significant risk. If higher work rate or dust likely to enter breathing zone then as sensible precaution FFP3 mask correctly face fitted. If product is RCF (cat 2 carcinogenic)for obvious reasons be more cautious & the mask for all but the smallest simplest job should be used.

Posted By Chris Packham I have a device I acquired in Germany, in a DIY store, intended to limit the amount of dust created when drilling into plaster, brick, etc. It simply attaches to a vacuum cleaner. The vacuum cleaner is switched on, the device placed on to the surface to be drilled. The drill is then inserted into a hole in the device and any dust is drawn away. It works a treat, but I have never seen anything similar in the U.K. However, it would not be difficult to fabricate something similar and this would be a simple means of controlling dust from drilling. Chris

Posted By Chris Packham I would not suggest a standard vacuum cleaner for an industrial application, but would contact one of the suppliers of LEV systems. Almost certainly one of their smallest units would suffice, probably with a simple filter. As far as disposal is concerned, I am no expert, but I would have thought that as this is an inert material no special arrangements would be needed. However, again I would check this with a specialist in this field. No doubt someone on this forum will be able to comment. Chris