How to unstick center disk of round slide rule?

powder

cleaned with

It's terrible here again! 56ºF and rain squalls, and wind gusts sufficient to tear pieces from traffic light backing plates, even those with "wind slots".

Going to be nasty when it gets to the East. ...Jim Thompson

The center wheel that goes into the aluminum area is 2-3/8" in diameter, the whole thing is 3-1/4".

Got that, a HP11C. However, when calculating part value ratios a slide rule is more practical because you typically only have 6 or 12 values per decade if you must use catalog inductors. Which I nearly always have to. Sometimes even down to 3-4 values because of notorious no-stock situations. So you de-focus your eyes a bit, squint, and then scoot the slide rule until a combination of values gets close enough. With a calculator you'd be typing on blisters pretty soon.

I wonder whether you might be able to polish the worst of those abrasions out of the aluminum recess? Perhaps a piece of something like crocus cloth, wrapped around your fingertip, rubbed in a circular direction?

Possible but some are rather deep and the outer dial would inevitable suffer. Maybe I can get a thin layer of PTFE somewhere.

A good thought - it would be easier to insert (and keep flat) than Teflon tape would be.

You might check with Professional Plastics. They seem to stock various varieties of PFTE sheet.

I understand that their stores tend to have a "cutoffs and scrap" bin, just as TAP Plastics does. You might be able to cadge a sufficiently large piece of thin PFTE sheet for scrap money, rather than having to buy a full-sized sheet.

A piece of grocery bag or two. Maybe half a mil each layer.

Poly bags? We use those for when our Rottweiler let's one go during our walks :-)

But I'll try.

I'll go through the garage bins on the weekend. Maybe I have some leftovers from winding HV transformer prototypes.

Not the "glassine bag" type, but the type that resists tearing.

Well - if you're twirling your slide rule that fast no wonder it's worn out !!

I do a lot of design work but blistered calculator fingers hasn't been a big delay factor so far - I do my best designs on long car journeys on my own so all sums done in my head !

Michael Kellett

All the ones around here tear. They are also extremely thin and may soon be taxed out of many CA stores.

Gunk Silicone Spray Lubricant

Spray onto a paper towel, then apply to where you need it... VERY slippery... MIST falling onto a tile floor may be hazardous to your health ;-) ...Jim Thompson

I am a little more patient with slide rules than with calculators and computers. But just a little more. So far I've only worn out one, a linear slide rule. It got to the point where the slider fell out when you held it upside down.

I do that in the evenings sometimes. Occasionally my wife then scolds me "See, you didn't listen again!" :-)

Hey, you don't want to move to Florida to a client of mine, do you? You'd get out of the dreaded wet UK winters, usually they do not have winters there. Ok, except for this year.

... or as you mentioned in another post ... slip ... *SPLAT* :-)

I thought that *SPLAT* noise was reserved for heavy duty diarrhea?

:-)

Ok ... phssswit ... *THUD*

Sounds 100% akin to the retarded mindset that brought us RoHS. Pretty much an absolutely stupid move. It is like your government saying "We are going to f*ck around with the economy of the stores you shop in so that your goods' prices will go up. You can thank us again, at tax time.

It looks like all the governments in the world have all gotten f*ck the public happy. All in the name of making things better for some goddamned generation in the future.

I want MY standard of living met NOW, and if my government hacks away at it much more, they will be the only ones eating steak.

Sorry, world, but that dumb s*it just isn't going to cut it.

still

nice

marks

turn

Try finding a BN lubricant, it is, fortunately, white and otherwise acts=20 a lot like graphite. May be a bit spendy though. Or maybe powdered = soapstone.