In article
,
Stanley Schaefer wrote:

On Mar 5, 11:54*am, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:
Bob Engelhardt fired this volley
:

How do you know that they haven't slipped? G

I know because I routinely change wheels. *I normally keep an 80-grit
alumina wheel on one side, and a knotted brush on the other.

The brush never comes off until it wears out, but sometimes I mount a
greenstone on the wheel side.

LLoyd

That's been my experience as well, swap from a fine alumina wheel to a
carborundum or green wheel and back. There's only been indents in the
cardboards from the pressure of the nut on the washers, no signs of
slippage.

I have no idea why those pins would show signs of shearing, the only
thing I could think of is bubba jamming big chunks of truck body in
there and stalling the wheel(s) out.

Bubba was my first theory. My second was to wonder if it was just 35
years of starts pecking away.


In the process of googling, I came up with this site:
http://vintagemachinery.org/members/detail.aspx?id=296
For the members here that have an interest in vintage tools, this has
a bunch of pdfs, exploded drawings and manuals. Also has a 1978
exploded drawing of the 23-612, Rockwell Int. Some of the other sites
I've found had the same thing under the Delta name. None of them show
pins in the arbors. Not really enough detail in the drawing to see if
there were keyways in the flanges. There are a few spares available,
though. Looks like they decided that pins weren't needed in the later
versions for driving wheels around.

This drawing looks exactly like the unit I have, and there is no part
number for a removable pin. But as you say, one cannot tell from the
drawing.

I like the part about making people replace the whole motor unit if a
bearing goes bad. There is nothing magical inside. I am going to
replace both bearings.

Joe Gwinn