Oil points on lathe

[F Murtz]

oil on to threads, gears, sliding metal surfaces ,some sleeve bearings etc

[Tim Lamb]

In message , F Murtz writes

Harry goes his own way:-)

They might work with oil as well of course. Not tried.

[harry]

I think you need to get read up on grease/lubricants.

[F Murtz]

Why? I would have thought the machinery makers That have been making their machines without wikipedia for centuries would have an idea where to use grease and where to use oil and this discussion is about oiling points not grease because although I have been using these oil points for over 60 years, I did not know their name or where to get them as I have never had a damaged one before.

[The Natural Philosopher]

Grease is just thick oil. Bunker oil at room temperature has the consistency of treacle, apparently.

the nipples will accept either in principle. You just need pressure.

[F Murtz]

Except that these things are designed so that the oil drips a distance from the oil points on to moving parts some distance away grease would just hang there. the parts that are lubricated are generally not high wear parts Have a look at your ordinary sewing machine oil holes and see what the oil drips on. on a small lathe they lubricate such things as the rails that things slide on, various threaded screws that operate slides, long threaded feed screws, feed screw gears etc

[harry]

So it does but it's not the sort of stuff you would want to put in any bearing.

[polygonum]

You might want to put it into the bearing of a naval artillery control.

(Actually, I have heard that bunker fuel is a particularly poor place for a shell to explode - but it is pretty close to the rest of the ship.)

[The Natural Philosopher]

No indeed. My point was solely to make the point that 'oil' and 'grease' are very broad terms.

I wouldn't want to lubricate my kingpins with goose grease or butter, either.

[Tim Lamb]

In message , The Natural Philosopher writes

I vaguely thought grease was an emulsion of soap and oil?

[The Natural Philosopher]

I hope not!

you can heat e.g. goose grease and when it stops spitting its got no water left.

Likewise clarified butter or margarine is pure carbohydrate - no water at all!

[S Viemeister]

Are you quite sure of that?

[The Natural Philosopher]

fairly. no water as an emulsion, anyway.

obviously carbohydrates are not always lacking every oxygen molecule.

[Andy Champ]

B**** all carbohydrate too. It's fat or oil. And yes, I do know that fats and (food) oils are made of C H and O, but they are not normally classed as carbohydrate.

Andy

[The Natural Philosopher]

sorry late night last night, HYdrocarbon.

carbohydrate implies oxygen IIRC.

[polygonum]

However, it is conventional in matters dietary to consider fat as being distinct from carbohydrate though on a strictly chemist's view, most fat is entirely carbon, oxygen and hydrogen.

[harry]

It used to be. Soluble oil still is.