[ARC5] Power supply suggestions

[Paul H. Anderson]

Todd - as you guessed, that thread was on this list.  I think I started it
when I asked about running dynos for the first time in awhile.

Since then, I've learned more.  I haven't broken or destroyed anything
yet, so that's a good sign.

Two things to ponder - the goo that remains dried out in bearings -
sometimes I think it may just be better to flush it entirely.  You can add
new solvents, but it just delays the problem, I think (note I haven't
tried Mike's suggestion of Mobil-1 in a bearing yet).  The reason I say
this is that if the unit is used and the grease is that dry, that by that
time, who knows what other crap got into it.

I'm trying to track down bearings for my R-391 autotune motor, which at
28V has at least that in common with the dynos.  Stupid autotune motor has
two different non-standard bearing sizes.

The local hardware store has cheapass Chinese bearings for a $10 or more
each.  Suppliers I've seen list cheap bearings (IBEC-1?) in this size
range for $3-$5 or so.  One point may be that a bulk purchase of bearings
known to be good for DM-32A dynos might be a good idea (likewise for R-391
autotune, but that is another issue).  The brushes are another matter -
those suckers are wierd looking.

The reason new bearings is appealing is that if the bearing is pre-lubed
double shielded, getting the shields off is a PITA, and I personally think
relubing is only going to postpone the inevitable.

One question I have is - are the DM-32A bearings double shielded, or
single?

I'd be willing to help contribute to a FAQ for ball bearings and brushes -
there must be others that know a lot more about it than I do, though.

Paul

On Wed, 16 Jan 2002, Todd Bigelow - PS wrote:

> You must have read my mind, Mike -
> 
> I was planning to post about this point, too. The day is approaching when I'll
> have more of the items necessary to fire up at least one receiver and get a
> feel for what's involved. I have a ton of questions related to this and all
> that is involved, but my primary concern was/is the dynamotor bearings and the
> proper care thereof. IIRC, in the last year or two there was a very good
> thread on the proper care, use, cleaning and repacking of bearings for
> dynamotors. Can't recall which list or who started it, but it was very
> informative about the need to disassemble the dynamotor somewhat to clean and
> relube the bearings. Types of lubrication were discussed as well as places to
> get exact replacement bearings, the proper process involved with doing it
> right, i.e. steps involved.
> 
> I'm thinking this might be an informative topic to revisit, since so many of
> us are either using or talking about using their dynamotors. Maybe we could
> come up with a FAQ for the use, maintainence, and overall care of this type of
> gear? Or does something already exist and I just need to get up to speed?
> 
> 73, Todd/'Boomer'  KA1KAQ
> 
> Michael Hanz wrote:
> 
> > Just a reminder, not directly associated with Paul's story below...it is
> > quite easy to ruin an NOS set of bearings on a dynamotor.  The only