I have a Powermatic Mod 63 Artisan saw. It makes an incredible noise when
the blade protrudes less than about half an inch above the table. Any
higher and no noise. If I loosen the tension on the depth adjusting wheel
the noise ceases. Does anyone have any ideas about this one. I have tried
pushing everything under the table (trunions, arbor, swing castings etc.)
with the saw running and nothing changes the pitch of the noise. Taking
tension off the belt by lifting the motor a little reduces the noise
somewhat. I am suspicious that the bearings may be bad but cannnot see why
blade exposure would influence the noise. Any thoughts will be appreciated.
Dave

"Dave W" wrote in message
...
I have a Powermatic Mod 63 Artisan saw. It makes an incredible noise when
the blade protrudes less than about half an inch above the table. Any
higher and no noise. If I loosen the tension on the depth adjusting wheel
the noise ceases. Does anyone have any ideas about this one. I have tried
pushing everything under the table (trunions, arbor, swing castings etc.)
with the saw running and nothing changes the pitch of the noise. Taking
tension off the belt by lifting the motor a little reduces the noise
somewhat. I am suspicious that the bearings may be bad but cannnot see why
blade exposure would influence the noise. Any thoughts will be
appreciated.
Dave
What kind of noise???

If you suspect bearings check first that the pulleys are tight. Often they
loosen and the wobble of the pulley will produce a loud fast
clicking/knocking noise. Second try flipping the belt around so that it
spins backwards if it is a normal v-belt. Belts can make a lot of noise
also and reversing the spin will change the noise. If the noise changes, a
new belt may fix the problem.

Leon,
Thanks for replying. After I posted the problem, I bit the bullet and
removed the arbor. One bearing is noticibely noisy when I turn the shaft by
hand. I guess the load on the bearing changed enough as the blade was
raised to make the bearing complain more.
Dave
"Leon" wrote in message
om...

"Dave W" wrote in message
...
I have a Powermatic Mod 63 Artisan saw. It makes an incredible noise when
the blade protrudes less than about half an inch above the table. Any
higher and no noise. If I loosen the tension on the depth adjusting wheel
the noise ceases. Does anyone have any ideas about this one. I have
tried pushing everything under the table (trunions, arbor, swing castings
etc.) with the saw running and nothing changes the pitch of the noise.
Taking tension off the belt by lifting the motor a little reduces the
noise somewhat. I am suspicious that the bearings may be bad but cannnot
see why blade exposure would influence the noise. Any thoughts will be
appreciated.
Dave
What kind of noise???

If you suspect bearings check first that the pulleys are tight. Often
they loosen and the wobble of the pulley will produce a loud fast
clicking/knocking noise. Second try flipping the belt around so that it
spins backwards if it is a normal v-belt. Belts can make a lot of noise
also and reversing the spin will change the noise. If the noise changes,
a new belt may fix the problem.