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Illegal dado blades?

Dado blades are illegal to sell, buy or use in some countries e.g. Denmark due to the danger.
What kind of dangers are there when using dado blades?

mikeasaurus1 month ago

The danger is that you've got much more contact with a dado stack, and therefore more points of failure while spinning very fast. Some table saws have a brake which stops the blade from spinning when the saw is turned off, with so much weight in a dado stack the brake has the possibility of loosening the arbor bolt and the dado stack could come off.

I haven't seen a table saw with a brake before, but I haven't seen a table saw in Europe either :)