Posts by Technical Editor

Synthetic oils are those that are manufactured by chemical processes. They can be tailor-made to suit a particular application Properties of synthetic oils – High viscosity index. Lubricants having low…

Additives in petrol that increase the octane number of petrol by increasing anti-knocking property of petrol are known as known as dope or doping agents. The main function of doping…

Vegetable and animal oils are glycerides of higher fatty acids. These oils are extracted by hot pressing of oil-bearing seeds and steam distillation of animal fats tissues examples of vegetable…

Thyrotrophic gels are those or fluids that are viscous under normal condition become thin or less viscous over time when agitated (shaken) or otherwise stressed. Similarly, greases on agitation or…

Semi-solid lubricants are a gel-like substance which reduced friction between two moving surfaces. E.g.; greases, Vaseline, waxes semi-solid lubricants (Greases) Preparation Greases are semi-solid lubricants obtained by thickening of lubricating…

Liquid lubricants are liquids that separate and reduce friction between two moving surfaces and decrease wear and tear. The properties of good liquid lubricants are as follows Properties of oiliness.…

Greases are defined as semi-conductor lubricants containing soap or mixture of soaps and fillers dispersed in lubricating oils (petroleum oils) making it suitable for lubrication under high load and slow…

Greases are preferred as lubricants when – Operating pressure is high. Operating temperature is high (800C) The machine operates at high load, slow speed with intermittent jerks where oil film…

Soap It acts as a thickener. Presence of soap allows it to stick to the metal surfaces firmly and provides consistency. The nature of soap decides the temperature to which…