On 9/22/2020 8:31 PM, dpb wrote:
On 9/22/2020 1:01 PM, Bob La Londe wrote:
On 9/21/2020 10:52 AM, Andrew M wrote:

...long tale of woe snipped for brevity...

More than likely just cleaning the sawdust out of arbor and nut threads
thoroughly and a little lube would have solved the OP's problem...

If the nut won't turn to tighten the blade enough to hold by finger
only, there's a problem there.

--



And most decent table saws allow an arbor wrench to be used along with
the arbor nut wrench. You might look to see if the arbor flange has a
spot to accept a wrench.