This work is written from the standpoint of the oil trade, but its perusal will be found very useful by users of machinery and all who have to do with lubricants in any way.
The best lubricantsto be used range all the way from sewing-machine oil to beeswax.
There are many lubricants to be recommended; in general, however, the particular kind to be chosen depends upon the parts to be lubricated.
The lubricants mostly used for such purposes are obtained from porpoise or dolphin jaw oils, bean oil, hazel nut oil, neatsfoot oil, sperm oil or olive oil.
Liquid lubricants are used for all high speed bearings.
When the speed of rubbing is considerable and the contamination film is liable to be destroyed, resort is had to lubricants which possess the power of keeping the surfaces apart, and thereby reducing the friction.
These lubricants are generally forced into the bearings by a form of syringe fitted with a spring piston, or are squeezed between the faces by means of a screw-plug.
The solid and semi-solid lubricants seem to act as rollers between the surfaces, or form a film between them which itself suffers abrasion or friction.
Large quantities of these greases are used with very good results for the lubrication of railway waggon axles, and some of them are excellent lubricants for the bearings of slow moving machinery.
True lubricants differ from ordinary liquids of equal viscosity inasmuch as they possess the property of "oiliness.
Generally speaking, the greater the viscosity of the lubricant the greater the load the bearing will carry, but with thick lubricants the frictional coefficient is correspondingly high.
Friction should be reduced as much as possible, and careful provision should be made to economize lubricants as well as fuel.
In the field it may not be possible to supply a complete assortment of lubricants called for by the Lubrication Guide to meet the recommendations.
An experiment was made to test the point using fresh oil and grease drawn from drums in stock, specimens of the same lubricants to which traces of a copper salt were added, and samples of lubricants taken from the bearings of several machines.
Removal of radioactivity absorbed into metals or mixed in lubricants and fuels is beyond the capabilities of unit personnel.
Radiation will penetrate the metal structures of vehicles and other equipment; radioactive material will be absorbed into the lubricants and fuels.
Sperm Oil~ is the best known of all the lubricants and is, for general purposes, one of the most excellent.
The Special Advantages of Mineral Oils~ as lubricantsin horology are: 1.
The lubricants just mentioned (59) serve admirably for this purpose.
The valuable qualities of lubricants are determined by their power of reducing friction, and by their endurance as well as that of the surfaces on which they are used.
Past experience has shown that many lubricantsremained for years unused for special purposes to which, when tried, they were found specially adapted.
Lubricants can be obtained from animal and vegetable fats, but mostly are inferior in quality, and there seems no hope of obtaining them in quantity.
Many lubricants which are cheaper than oil are extensively used on "automatics" for general machining operations.
In the specification of engine lubricants the feature of load carried by the engine should be carefully considered.
Lubricants should be free from acid, or alkalies, which tend to produce a chemical action with metals and result in corrosion of the parts to which they are applied.
Lubricants may exist as fluids, semifluids, or solids.
It is sometimes used where it would not be possible to use other lubricants because of extremes of temperature.
Lubricants derived from the crude petroleum are called "Oleonaphthas" and they are a product of the process of refining petroleum through which gasoline and kerosene are obtained.
The maximum of pressure that solid lubricants will bear without destruction is unknown.
There are some oils which are excellent lubricants for the first few hours of use, but which have a low capacity for resisting the influence of the oxygen of the atmosphere upon them.
The chief lubricants used are oil and tallow, which have a less coefficient of friction than the parts in contact.
In using this machine I found that, although it was supposed to test lubricants in the way in which they are used in manufactories, a slight difference existed, which prevented accurate results.
Lubricants in the market vary much in cost as well as in quality, and very often it is found that the varying prices bear little or no relation to the value of the article purchased.
Good lubricants should have the following qualities: (1) Sufficient body to keep the surfaces free from contact under maximum pressure.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "lubricants" in a variety of sentences. We hope that you will now be able to make sentences using this word.
