Products

Bearings - SKF SolidOil NSF H1

SKF bearings with Solid Oil are designed for use in applications where high levels of moisture and incidental contact with water and other contaminants are real issues. Bearings with Solid Oil are lubricated for the life of the bearing and cannot be relubricated.

Solid Oil

  • is an oil saturated, polymer material
    • moulded into the bearing, forming very narrow gaps between the rolling elements, raceways and cage(s), enabling the bearing to rotate freely
    • having a porous structure, with millions of micro-pores that retain the lubricating oil by surface tension
  • virtually fills all of the free space in the bearing
  • releases oil into the narrow gaps, during operation, providing effective minimum quantity lubrication

Bearing features

  • Long service life
    • An increase in operating temperature pushes the oil toward the surface of the polymer material, supporting consistent lubricant supply. During shutdown, any excess oil is reabsorbed back into the polymer material. 
  • Extended lubricant life
    • With Solid Oil bearings, a large amount of oil is available (two to four times more compared to conventional grease fill).
    • The Solid Oil polymer structure eliminates lubricant churning.
    • Solid Oil is a high-quality synthetic oil that resists oxidation.
  • Resists washout
    • Solid Oil cannot be washed out and virtually fills all free space, limiting the amount of wet contamination that can enter the bearing.
    • Water cannot mix with the oil or Solid Oil polymer.
  • Virtually eliminates lubricant leakage
    • Solid Oil retains oil in the bearing.
    • Integral bearing seals further increase the oil retention.
  • Protects against the ingress of contaminants
    • Close osculation between Solid Oil and the rolling elements and raceways significantly reduces the ingress of contaminants.
    • Solid Oil provides additional support for integral bearing seals.
The SKF standard assortment of bearings and bearing units with Solid Oil includes:
  • Deep groove ball bearings
  • Spherical roller bearings
  • Insert bearings and ball bearing units
  • Tapered roller bearings
  • Cylindrical roller bearings
  • Self-aligning ball bearings

On request, SKF can supply other bearing types with Solid Oil to meet the needs of a particular application, except for CARB toroidal roller bearings which are unsuitable for use with Solid Oil. Bearings fitted with a large-volume cage are not suitable for Solid Oil because there is too little free space inside the bearing.

Solid Oil variants

  • Standard variant (designation suffix W64)
    • contains a high-quality synthetic oil
    • meets the needs of most applications
  • Food-grade variant (designation suffix W64F)
    • contains an oil registered by NSF as a category H1
    • meets the needs of food applications

Sealed bearings

  • with integral contact seals are strongly recommended in wet environments 
  • with Solid Oil increase the sealing effectiveness, as the Solid Oil supports the seals axially, preventing them from deflecting and opening under pressure

Where carbon steel bearings are exposed to wet environments, additional external seals are recommended to protect the bearing’s external surfaces from corrosion.

Dimension standards, tolerances, internal clearance
Refer to Bearing (unit) data in the relevant product section of the standard bearing (unit).

Load carrying capacity
The basic dynamic and static load ratings for bearings with Solid Oil are the same as for corresponding SKF standard bearings.

Temperature limit max. 85 °C
The permissible operating temperature for bearings with Solid Oil can be limited by:
  • the dimensional stability of the bearing rings and rolling elements
  • the cage(s)
  • the seals
  • the Solid Oil

Further downloads, documentation available on request
Source: SKF
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