Larry Fishel wrote in news:c40f8a2f-1671-4c45-bf47-
:

Worn bearings can cause it to roar,

My 25yo B&D indeed roars. Kerf is a tad wide too :-)

and if it's really bad, I would
probably replace it. But if the blade is spinning at a good speed and
it's not cutting, then either the blade is dull or the wrong kind for
what you're trying to cut.