Aircraft Lubricants : Grease Vs Oil
EASA MODULE 7 SUB MODULE 7.3 TOOLS Lubrication Methods: Solid surfaces are never perfectly smooth, as the actual rubbing contact (the friction), between two moving surfaces, is concentrated on a number of high spots on the respective surfaces. Any load between the two surfaces tends to wear away these high spots until the area of contact is large enough to support the load without further deformation. During the wearing action fragments of the surface are broken away and high local temperatures are generated. The effects are potentially dangerous, in that the fragments can cause serious damage to the surfaces while excess heat leads to expansion of the materials. The expansion is likely to cause higher frictional forces, leading to further damage (due to more particles breaking from the surface) and can possibly result in eventual ‘seizure’ and stoppage of movement. Seizure could have disastrous results in any moving mechanism. Lubrication is a process for re...