[ARC5] Dynamotor Maintenance

[Kenneth G. Gordon]

On 19 Jan 2013 at 20:15, J. Forster wrote:

> I am puzzled by your statement that Graphite is abrasive, especially since
> it is widely used as a dry lubricant.
> 
> Messy, for sure, but abrasive?

I know a geologist, Charles Knowles, here in Moscow who claims that graphite is ONLY an 
abrasive, and is never really a lubricant in the strict sense of that word.

He ran the equipment, xray machines, NMR, etc, with which he determined the consituents 
of various minerals and other materials for researchers. He was very highly regarded for his 
accuracy and was called upon for many criminal investigations, in addition to the work he did 
for researchers.

As far as I know, the only place that graphite is commonly used as a "lubricant" is in locks. In 
that use, it is operated slowly enough and seldom enough so that its abrasive qualities aren't 
immediately obvious.

It makes a darned fine metal polish.

I would certainly never use it in a bearing...

Ken W7EKB