Roller Bearings link ? ( was Bad Bearing ( was Re: stuck stepper

I am lucky in that the houseing allows the bearing to move and the
spring washers hole the bearing in place. Very good fit.

Believe it or not, I use an old set of inside dividers. seems that
either I have just been doing it too long or I can just 'feel' the
friction of the surface well enough to get things dead on.

There are some times when I would like a press fit, and the parts is
really hot from a lot of boring that I will take the hot part onto
the shaft/bearing, press it, and let it cool. It's great going on,
but I hate to have to take them apart later.

Dave

--- In CAD_CAM_EDM_DRO@y..., "Erik Reikes" <ereikes@r...> wrote:
> > It seems that the rear bearing may have frozen, then spun in it's
> > housing before the rack gave up. since it appears to have spun
in
> > the housing it needed a little persuation to come out. now it
will
> > slide from the pressure of the spring washers.
> >
> > Dave
>
> When you get the new bearing here's a little trick I use to get a
> press fit in a slightly too large hole. Put the housing in a vise
> and use a center punch to create a series of divots around the
inside
> of the bearing seat. These divots will displace some metal up and
> allow you to press in a new bearing in a slightly too large hole...
>
> The reason I know this is that my bored out bearing pockets end up
> being slightly oversize about half the time. I need to get an ID
> measuring tool because calipers just don't cut it for .0005
tolerance
> bearing pockets.
>
> HTH
>
> -Erik Reikes