Sears table saw help

Michael wrote:
>
> I have a (113.298762) Sears table saw.
>
> I would imagine the design is much the same as any.
>
> My question is....
>
> I'm having constant problems with the alignment on the 2 pulleys for the
> drive belt.
>
> One pulley is on the motor and the other on the saw blade shaft and they
> always move out of place after a while and cause the saw to make alot of
> racket.
>
> When they are in line....the saw is very quiet.
>
> First of all......(don't laugh)......are those keys supposed to be in the
> slots on each shaft?.....because I know that's what ends up moving around,
> the key.
>
> These keys are angled and I don't get the design because they are bound to
> slip no matter how hard I tighten.

Don't understand -- angled where? The keys are square stock.

> Can anyone put me in the right direction with this or have a fix?

Probably the problem is they are cheap cast pulleys that are both not
quite balanced and have bores that are larger than necessary and
probably also not quite round. Consequently, they don't fit well as
they should and vibration gradually loosens them. They then run loose
for a while and that causes more wear which exacerbates the problem and
so it goes...

If they are, in fact, a set of these cast pulleys, finding a replacement
set of machined ones will probably fix the problem permanently.

Greg G. wrote:
> Michael said:
>
>
>>I have a (113.298762) Sears table saw.
>>
>>First of all......(don't laugh)......are those keys supposed to be in the
>>slots on each shaft?.....because I know that's what ends up moving around,
>>the key.
>
>
> This may be a pointless question, but isn't there a grub screw that is
> supposed to hold the pulley in position. Most have one. It's a small
> hex head allen screw. There should be a hole in the side of the
> pulley hub. Tighten it, but don't strip it out.
>
>
>>These keys are angled and I don't get the design because they are bound to
>>slip no matter how hard I tighten.
>
>
> Never seen an angled one - they are usually square stock, and you
> definitely need it. That is what prevents the pulley from spinning on
> the shaft. There are tremendous rotational forces going on there...
> They *might* have used a woodruff key, but I've never seen one on a
> table saw.
>
>
>>Can anyone put me in the right direction with this or have a fix?
>
>
> Hopefully, I just did. :-)
>
>>I bought a couple of 5/8" shaft collars and thought I may be able to do a
>>something with them.
>
>
> I'd try to fix the problem with the original design if possible...
> Then try modification - there may be unseen caveats.
>
>
> Greg G.
Perhaps also a little Loctite to help prevent the screw from loosening

"Duane Bozarth" <[email protected]> wrote in message
news:[email protected]...
> Michael wrote:
>>
>> I have a (113.298762) Sears table saw.
>>
>> I would imagine the design is much the same as any.
>>
>> My question is....
>>
>> I'm having constant problems with the alignment on the 2 pulleys for the
>> drive belt.
>>
>> One pulley is on the motor and the other on the saw blade shaft and they
>> always move out of place after a while and cause the saw to make alot of
>> racket.
>>
>> When they are in line....the saw is very quiet.
>>
>> First of all......(don't laugh)......are those keys supposed to be in the
>> slots on each shaft?.....because I know that's what ends up moving
>> around,
>> the key.
>>
>> These keys are angled and I don't get the design because they are bound
>> to
>> slip no matter how hard I tighten.
>
> Don't understand -- angled where? The keys are square stock.
>
>> Can anyone put me in the right direction with this or have a fix?
>
> Probably the problem is they are cheap cast pulleys that are both not
> quite balanced and have bores that are larger than necessary and
> probably also not quite round. Consequently, they don't fit well as
> they should and vibration gradually loosens them. They then run loose
> for a while and that causes more wear which exacerbates the problem and
> so it goes...
>
> If they are, in fact, a set of these cast pulleys, finding a replacement
> set of machined ones will probably fix the problem permanently.
And, a place that works on electric motors is apt to have just what you
need. All keys I have ever seen are square, and, yes, you definitely need
them.
Jim

Michael said:

>I have a (113.298762) Sears table saw.
>
>First of all......(don't laugh)......are those keys supposed to be in the
>slots on each shaft?.....because I know that's what ends up moving around,
>the key.

This may be a pointless question, but isn't there a grub screw that is
supposed to hold the pulley in position. Most have one. It's a small
hex head allen screw. There should be a hole in the side of the
pulley hub. Tighten it, but don't strip it out.

>These keys are angled and I don't get the design because they are bound to
>slip no matter how hard I tighten.

Never seen an angled one - they are usually square stock, and you
definitely need it. That is what prevents the pulley from spinning on
the shaft. There are tremendous rotational forces going on there...
They *might* have used a woodruff key, but I've never seen one on a
table saw.

>Can anyone put me in the right direction with this or have a fix?

Hopefully, I just did. :-)
>
>I bought a couple of 5/8" shaft collars and thought I may be able to do a
>something with them.

I'd try to fix the problem with the original design if possible...
Then try modification - there may be unseen caveats.


Greg G.