On Apr 7, 3:16=A0pm, dpb <[email protected]> wrote:
> The Wolf wrote:
> > Replaced the arbor bearings a few weeks ago and now they are making noi=
se
> > again. They can't be worn out already, what else could cause the noise?
>
> Was the noise gone immediately after replacement but now it's back again?
>
> If so, I'd say you either have a severe misalignment, _way_ too much
> belt tension or similar problem causing a premature failure or as Lew
> says, screwed 'em up in the replacement process....or, the bearings
> weren't and aren't the noise in the first place. =A0But, what specificall=
y
> was a noise is pretty much indeterminate from here w/o knowing what it
> sounds like or anything else--perhaps, it's simply normal or the motor or=
...
>
No sarcasm intended here, but can "too much belt tension" ever be a
problem with an Unisaw? The motor's weight hanging from a pin
provides tension across all three belts.
Also to the original poster; I would like to know how old your Uni is
and how much you use it. I am only curious because I wonder when (or
if) I will be noticing any bearing wear in the next few years.
Thanks,
Marc
On Apr 8, 9:45=A0am, Swingman <[email protected]> wrote:
> On 4/8/2010 8:14 AM, Leon wrote:
>
> > Yes but it is not the free hanging weight of the motor that provides th=
e
> > tension. =A0Most cabinet saws belts are tensioned much like those on an
> > automibile, hanging weight of the motor like that on a contractors saw =
is
> > not the norm.
>
> > Now the older Unisaws may be totally different. =A0 =A0;~)
>
> Tensioning the belts on all Unisaurs that I've ever seen is the same,
> and, like you say, pretty much like those on an automobile ... belt
> tension is locked in with a bolt and bracket.
>
> --www.e-woodshop.net
> Last update: 10/22/08
> KarlC@ (the obvious)
Hey Karl and Leon,
Yes, I was not thinking properly. I had disassembled a '63 Uni and my
working Uni has not been touched (if it ain't broke, don't fix it) and
I can not recall all of the steps involved in removing the belts and
motor. I do not recall a locking bolt but I am sure it existed and
just absent from memory. I hope to refresh that memory this
evening.
=20
Marc
On Apr 7, 3:12=A0pm, dpb <[email protected]> wrote:
> GROVER wrote:
> > On Apr 7, 11:31 am, The Wolf <[email protected]> wrote:
> >> Replaced the arbor bearings a few weeks ago and now they are making no=
ise
> >> again. They can't be worn out already, what else could cause the noise=
?
>
> > Its a possibility the replacement bearings might have been defective
> > ( They might have been on the shelf long enough for the lubrication to
> > fail.)
> > Joe G
>
> I _could_ get hit by an asteroid this afternoon, too...
>
> --
You should probably wear a hard hat.
Joe G
"The Wolf" wrote:
> Replaced the arbor bearings a few weeks ago and now they are making
> noise
> again. They can't be worn out already, what else could cause the
> noise?
-----------------------------------------------
If you inadvertently applied a force that was transposed across the
balls of the bearings during installation, you could have very easily
brinnelled the bearings which would cause them to make noise and
require replacement.
Lew
"GROVER" <[email protected]> wrote in message
news:abf616fc-4de1-4c5d-941d-93bd0022e053@g30g2000yqc.googlegroups.com...
On Apr 7, 11:31 am, The Wolf <[email protected]> wrote:
> Replaced the arbor bearings a few weeks ago and now they are making noise
> again. They can't be worn out already, what else could cause the noise?
Its a possibility the replacement bearings might have been defective
( They might have been on the shelf long enough for the lubrication to
fail.)
Joe G
More likely to have installed cheap bearings in the first place or damaged
when inserting them.
On 4/7/10 12:16 PM, in article [email protected],
"dpb" <[email protected]> wrote:
> The Wolf wrote:
>> Replaced the arbor bearings a few weeks ago and now they are making noise
>> again. They can't be worn out already, what else could cause the noise?
>>
>
> Was the noise gone immediately after replacement but now it's back again?
>
> If so, I'd say you either have a severe misalignment, _way_ too much
> belt tension or similar problem causing a premature failure or as Lew
> says, screwed 'em up in the replacement process....or, the bearings
> weren't and aren't the noise in the first place. But, what specifically
> was a noise is pretty much indeterminate from here w/o knowing what it
> sounds like or anything else--perhaps, it's simply normal or the motor or...
>
> --
It was gone immediately after replacement but now is back. It's the arbor,
not the motor.
Am going to pull the top soon and investigate further. There were some
hairline cracks in the bracket on top of the right bearing. Don't know if
this was a factor.
"marc rosen" <[email protected]> wrote in message
news:[email protected]...
>
No sarcasm intended here, but can "too much belt tension" ever be a
problem with an Unisaw?
Probably not as with use the belts will stretch out. Typically you want the
initial belt tension pretty tight.
The motor's weight hanging from a pin
provides tension across all three belts.
Yes but it is not the free hanging weight of the motor that provides the
tension. Most cabinet saws belts are tensioned much like those on an
automibile, hanging weight of the motor like that on a contractors saw is
not the norm.
Now the older Unisaws may be totally different. ;~)
On 4/8/2010 8:14 AM, Leon wrote:
> Yes but it is not the free hanging weight of the motor that provides the
> tension. Most cabinet saws belts are tensioned much like those on an
> automibile, hanging weight of the motor like that on a contractors saw is
> not the norm.
>
>
> Now the older Unisaws may be totally different. ;~)
Tensioning the belts on all Unisaurs that I've ever seen is the same,
and, like you say, pretty much like those on an automobile ... belt
tension is locked in with a bolt and bracket.
--
www.e-woodshop.net
Last update: 10/22/08
KarlC@ (the obvious)
"Lew Hodgett" <[email protected]> wrote in message
news:[email protected]...
>
> "The Wolf" wrote:
>
>> Replaced the arbor bearings a few weeks ago and now they are making noise
>> again. They can't be worn out already, what else could cause the noise?
> -----------------------------------------------
> If you inadvertently applied a force that was transposed across the balls
> of the bearings during installation, you could have very easily brinnelled
> the bearings which would cause them to make noise and require replacement.
>
> Lew
Yeah you only want to apply force to the race that is making contact.
On Apr 7, 11:31=A0am, The Wolf <[email protected]> wrote:
> Replaced the arbor bearings a few weeks ago and now they are making noise
> again. They can't be worn out already, what else could cause the noise?
Its a possibility the replacement bearings might have been defective
( They might have been on the shelf long enough for the lubrication to
fail.)
Joe G
GROVER wrote:
> On Apr 7, 11:31 am, The Wolf <[email protected]> wrote:
>> Replaced the arbor bearings a few weeks ago and now they are making noise
>> again. They can't be worn out already, what else could cause the noise?
>
> Its a possibility the replacement bearings might have been defective
> ( They might have been on the shelf long enough for the lubrication to
> fail.)
> Joe G
I _could_ get hit by an asteroid this afternoon, too...
--
"Lew Hodgett" <[email protected]> wrote in message
news:[email protected]...
>
> "The Wolf" wrote:
>
>> Replaced the arbor bearings a few weeks ago and now they are making noise
>> again. They can't be worn out already, what else could cause the noise?
> -----------------------------------------------
> If you inadvertently applied a force that was transposed across the balls
> of the bearings during installation, you could have very easily brinnelled
> the bearings which would cause them to make noise and require replacement.
>
> Lew
Ah, "brinelled" -- A material surface failure caused by contact stress that
exceeds the material limit.
Learn something new everyday! :)
Bill
The Wolf wrote:
> Replaced the arbor bearings a few weeks ago and now they are making noise
> again. They can't be worn out already, what else could cause the noise?
>
Was the noise gone immediately after replacement but now it's back again?
If so, I'd say you either have a severe misalignment, _way_ too much
belt tension or similar problem causing a premature failure or as Lew
says, screwed 'em up in the replacement process....or, the bearings
weren't and aren't the noise in the first place. But, what specifically
was a noise is pretty much indeterminate from here w/o knowing what it
sounds like or anything else--perhaps, it's simply normal or the motor or...
--