LUBRICATING OIL

Rotorua Morning Post, Volume 1, Issue 34, 2 October 1931, Page 5

LUBRICATING OIL

ADVANTAGES OF PARAFFIN BASE. Lubricating oil is an engineering agent of maintenance. More important than material like paint which protects equipment; more important than an engineering service like fire insurance which also protects against loss of equipment — more important, because lubricating oil protects machinery against rapid depreciation and therefore loss . Lubricating oils are of various grades; they are distinguished one from the other hy tests — tests, if you please, of strength. Just as steel has strength to resist forces of tension, so your oil offers resistance to the separation of its particles in the action of a bearing; just as cast iron has strength to resist forces which would crush it (compressive strength) so oil has strength to oppose the too ready expulsion from a bearing. You may call this strength by. another name, viscosity, perhaps, but strength it is just the same.

Also your oil has other kinds of strength, in greater or lesser degree. Strength to resist high temperatures; stength to resist oxidation, to resist the emulsifying action of hot water, steam acids and alkalis. There may he other distinguishing qualities as resistance to change with lowering temperatures, the colour, the property to flow through small orifices continuously and -uniformly, and so on. But we are interested in the present discussion primarily in the most important strength of lubricating oil, that which opposes shear, which on the one hand is a measure of the power consuming quality and on the other determines its protective power ; which in turn depends on its success in opposing* those forces which tend J to expel it constantly from its proper place. Exhaustive, exacting tests eonducted by engineers and lubrication chemists have proved that lubricating oils having a paraffin base, such as Atlantic Motor Oil, which isc100 per cent. pure paraffin base, are infinitely superior in all the attribntes which give to an oil those essential allround lubricating qualities.