ok, so i am starting the process to rebuild several 1960's era craftsman
equipment, starting with the jointer.
i have the motor dissasembled, it wasnt too bad but needed a little
cleaning. bearings roll nicely, and were not too dirty.
my question is how much and what kind of grease should i use? will regular
bearing grease be ok? its made for very high temps ........
do i just need a little coating on the outside edge of the bearings where
they must move agaist the inset of the housing?? there didnt seem to be a
whole lot on them, not sure if thats normal or it has worn away with
time.....
david
no hammer needed anywhere. slight prying to get the end caps off, but thats
just what it takes and there is a little slot there just for that purpose.
otherwise, i did not take the bearings off the shaft, the whole assembly
just slipped right out. i did have to use the plastic handle of a large
screwdriver to tap the pulley as i turned it so i could remove it from the
shaft, then i wire-brushed the shaft and the little slot key thingy and put
it back together.
guess i won't know until i put a load on it, but it will be a while as i
have a lot of restoration to do to the rest of the jointer....
Bearings should NOT turn on the outside surface or the inside
surface. The whole point is to do the turning on the ball
bearings which you can see on some bearings, but I'm sure are
covered by a dust shield on your bearings. They are permanently
lubricated bearings, not serviceable - run till they growl or
click, then replace them. It is failure of the "system" if the
bearing's outer shell slips in its recess - Loktite makes a
product to glue them in location if this happens.
--
______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)
[email protected]
<[email protected]> wrote in message
news:[email protected]...
> ok, so i am starting the process to rebuild several 1960's era
> craftsman
> equipment, starting with the jointer.
>
> i have the motor dissasembled, it wasnt too bad but needed a
> little
> cleaning. bearings roll nicely, and were not too dirty.
>
> my question is how much and what kind of grease should i use?
> will regular
> bearing grease be ok? its made for very high temps ........
>
> do i just need a little coating on the outside edge of the
> bearings where
> they must move agaist the inset of the housing?? there didnt
> seem to be a
> whole lot on them, not sure if thats normal or it has worn away
> with
> time.....
>
>
> david
<[email protected]> wrote:
> ok, so i am starting the process to rebuild several 1960's era
> craftsman
> equipment, starting with the jointer.
>
> i have the motor dissasembled, it wasnt too bad but needed a little
> cleaning. bearings roll nicely, and were not too dirty.
>
> my question is how much and what kind of grease should i use? will
> regular
> bearing grease be ok? its made for very high temps ........
At a minimum, replace the bearings since you probably have already
brinnelled the races getting the motor apart.
Brinelling will often go undetected until the motor is reassembled and
the motor placed under load.
At that point, the motor will start sounding like a threshing machine.
Bearing replacement is standard practice when rebuilding a motor.
These bearings will be 203 size, the lowest cost bearings made.
Lew
On 13-Sep-2009, "Lew Hodgett" <[email protected]> wrote:
> Brinelling
hmmmm...already reassembled......the motor actually came apart quite easily,
and everything has been pretty gentle so i am hoping there is no brinelling
- only takes 1/2 hour or so if i have to replace them so i guess i'll have
to see.
are you saying that anytime you take an electric motor apart you will damage
the bearings???
<[email protected]> wrote:
> are you saying that anytime you take an electric motor apart you
> will damage
> the bearings???
It is almost impossible to take a motor apart without transferring a
static load from inner race across a couple of balls to the outer race
when taking a motor apart.
The result is the balls brinell the races or leave pit marks in the
races.
Standard practice is to replace the bearings and properly use an arbor
press to reassemble the motor avoiding the load transfer across the
bearings during re assembly.
Lew
On Tue, 15 Sep 2009 18:25:20 GMT, "Lew Hodgett"
<[email protected]> wrote:
><[email protected]> wrote:
>
>> are you saying that anytime you take an electric motor apart you
>> will damage
>> the bearings???
>
>It is almost impossible to take a motor apart without transferring a
>static load from inner race across a couple of balls to the outer race
>when taking a motor apart.
>
>The result is the balls brinell the races or leave pit marks in the
>races.
>
>Standard practice is to replace the bearings and properly use an arbor
>press to reassemble the motor avoiding the load transfer across the
>bearings during re assembly.
>
>Lew
>
Depends a lot on the motor though. Some can be taken apart by hand
with virtually no prying or hammering, and assembled just as easily.
In that case bearing damage would be unlikely - but When you have a
motor apart a couple bucks worth of bearings is cheap insurance.
Usually takes more work to get AT the motor than to repair it.
>
<[email protected]> wrote in message
news:[email protected]...
>
> On 13-Sep-2009, "Lew Hodgett" <[email protected]> wrote:
>
>> Brinelling
>
> hmmmm...already reassembled......the motor actually came apart quite
> easily,
> and everything has been pretty gentle so i am hoping there is no
> brinelling
> - only takes 1/2 hour or so if i have to replace them so i guess i'll have
> to see.
>
> are you saying that anytime you take an electric motor apart you will
> damage
> the bearings???
That would appear to be what he is saying but it is not true. You say the
bearings feel fine. Did you use a hammer to take them out? If not, put them
back in and be happy.