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" <[email protected]> wrote in message
news:[email protected]...
>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" <[email protected]> wrote in message
news:[email protected]...
>
> "Dave W" <[email protected]> wrote in message
> news:[email protected]...
>>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.
>