On While I cannot comment on the Jointer question directly / from
experience, I can offer an accounting of an experience helping an
electrician pal years ago with a restraint exhaust fan problem he was
It seems they called him when the fan stopped working and he came,
found a broken driven pully and replaced it - problem solved, fan
working. He got paid and left.
He wound up calling me to take a look because the fan stopped working
the next day - blowing the breaker (and the breaker he replaced) and
he could not figure out why.
I climbed up on the roof to find that, fortunately, he was a less than
diligent repairman and hadn't cleaned up the work space after leaving
the first day. I found a bit of the original pulley laying about near
the fan motor and asked if it was a piece of the old, broken pulley.
When he confirmed that suspicion, I held it up against the replacement
he'd installed and determined that it was larger (or smaller) by a
half-inch or so than the original.
Off to ACE Hardware and back to install the correct size pulley on the
fan and the problem was finally solved.
For what it is worth, tools are designed by engineers who have done
all the calculations and assembled a device with all the appropriate
parts. Absent some Engineering knowledge and an intent to "tweak" your
tool a bit, safe bet to to replace parts with the exact same thing
they were designed with.