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Features of Solid Oil

Solid Oil is an oil saturated, polymer material that virtually fills all of the free space in the bearing. The polymer material is moulded into the bearing forming very narrow gaps around the rolling elements and raceways, enabling the bearing to rotate freely. The polymer material has a porous structure, with millions of micro-pores, that hold the lubricating oil retained by surface tension. In service, oil is released from the material into the narrow gaps between it and the bearing components, thus providing effective minimum quantity lubrication.

Consistent lubricant supply

Solid Oil enables bearing lubrication with an even and consistent film of oil. An increase in operating temperature pushes oil toward the surface of the polymer material. This “flow” of oil within the polymer material occurs because the oil has a higher coefficient of thermal expansion than the polymer material and because the viscosity of the oil decreases with increasing temperature. During shutdown, any excess oil is reabsorbed back into the polymer material.
Longer lubricant life
A bearing with Solid Oil contains two to four times more oil than bearings lubricated with a conventional grease fill. The high quality synthetic oil resists oxidation and the solid structure of the polymer material means that it cannot be overrolled or churned further extending lubricant life. Bearings with Solid Oil are lubricated for the life of the bearing and cannot be relubricated.
Improves performance in wet environments

Solid Oil is beneficial where a bearing is exposed to wet environments since:


  • It cannot be washed out and virtually fills all free space limiting the amount of wet contamination that can enter the bearing 
  • It helps to maintain good lubrication by retaining the oil, distributing it over the bearing surfaces and resisting emulsification 
  • It physically supports integral seals, reinforcing their effectiveness under washdown conditions
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