dpb wrote:

larry moe 'n curly wrote:
...
But a lot of double-insulated tools have a large exposed metal area
that the user will likely hold during operation. An example is the
metal gear case of a corded electric drill. Doesn't that defeat the
double insulation? ...

Depends on how it is connected to the rest of the saw. If it is
isolated, it still won't/can't complete a circuit.

The motor's non-isolated metal shaft is in contact with a metal
bearing, either directly or through a metal gear, that's in contact
with the exposed metal. IOW if a motor winding shorts to the
armature, electricity can flow through the metal part of the case.