[GreenKeys] Lubricating a 15 printer

[Nick England]

A search in the archives on "oil" shows a mere 2512 results found
I think Doug Jones has done pretty good research
http://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/ks7470oil.shtml

Cheers,
Nick

On Tue, Jul 20, 2021 at 5:41 PM Richard Knoppow <1oldlens1 at ix.netcom.com> wrote:
>
>     As a sort of side note, one of my great frustrations is
> getting authentic information on lubricants. People recommend all
> sorts of exotic stuff but there is little reliable information on
> what they really do. A prime example is the lubrication
> instructions for Compur shutters. These were found on many deluxe
> quality cameras. They are not really difficult to work on but the
> factory instructions specify at least four different lubricants,
> all by German trade names of perhaps fifty years ago. And, BTW,
> the last set of instructions reccommened running the shutters dry
> ! have encountered the same problem for many other pieces of
> equipment. Makes you wonder. For instance, will a modern
> synthetic grease, like Mobile One (is this the sticky red stuff
> mentioned?) serve in most applications requiring fairly heavy
> grease? How about "turbine oil" which I understand is just highly
> refined (what does that mean) oil. How about modern synthetic
> watch oil. In the distant past whale oil was used, or porpoise
> jaw oil. There is now silicone oil sold for similar purposes.
> Supposed to not jell or move around. Extremely light oil for use
> on jeweled bearings, etc. Nye used to sell the synthetic stuff.
> Probably not useful on TT machines but would be nice to know.
>     There are now all sorts of synthetic oils  for cars,
> supposedly they do not oxidize or change as much with heat. Along
> the same line oils with detergents, made mostly for cars, are not
> supposed to be good for general lubrication, well I want some
> definite, authentic information. Same with multi-grade oils,
> which have additives to control the viscosity. Supposedly not so
> good for general lubrication, why?  Of course, there is also
> extreme pressure grease and even more pressure resistant grease
> (lost the name for it) for auto differentials, which have
> additives to prevent the grease from being squeezed out of the
> gears. Again, not suitable for general lubrication.
>     I picked all this up from lots of general reading. I have
> seen very technical literature on lubricants but am lost, they
> require too much specialized knowledge. This leaves out vegetable
> oils like castor oil, once (and maybe still) the stand by for
> racing cars. Has this any place against modern synthetics? I have
> no idea where to find out.
>
> On 7/20/2021 2:07 PM, John, W9DDD wrote:
> > Is there a better set of instructions than what I find in
> > bulletin 138B?  The instructions there are rather terse
> > compared to 28 lubrication instructions.
> >
> > And the places that call for oil, grease, oil.  I kind of think
> > that's designed to get a thinner lubricant than just plain
> > grease.  Or is there another explanation.
> >
> > I'm doubtful that doing the O-G-O operation with Red "N "Tacky
> > will get the desired result.
> >
> > Any recommendations?  Is the Army TM for the 15 better for lub
> > instructions?
> >
> >
>
> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
> >>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
> >>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
> >>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
> >>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to navy.radio at gmail.com