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What does the term Solid oil mean?

Solid oil is a polymeric matrix saturated with oil, forming a seamless fill within the bearing’s available space, enveloping both the rolling components and the cage. The polymer material features a porous framework, replete with millions of micro-pores designed to retain the lubricating oil.

Ball and roller bearings have conventionally relied on the application of grease and oils for lubrication. However, these lubricants frequently result in leakage and contamination of the nearby environment, necessitating regular maintenance involving manual or automated re-lubrication. Volution’s solid polymer lubricant, known as VPL, effectively mitigates or even eradicates the issues commonly linked with traditional lubrication methods.

VPL solid polymer lubricants offer several advantages, including:

  • Maintenance-Free Operation: VPL lubricants eliminate the need for regular re-lubrication, ensuring continuous performance.
  • Precise Lubrication: They consistently provide the optimal amount of lubrication required for efficient operation.
  • Contamination Resistance: VPL lubricants are highly resistant to contamination, maintaining bearing integrity even in challenging environments and during washdowns without the need for extra seals.
  • Durability in Harsh Conditions: These lubricants can withstand demanding applications, making them suitable for rugged environments and substancial G-forces.
  • Low temperature environments: Solid oil bearings can operate at a significant lower temperature than normal greased bearings.
  • Enhanced Cleanliness: VPL lubricants significantly improve cleanliness by preventing contaminants from infiltrating and affecting bearing performance.
  • Extended Bearing Life: By blocking out contaminants and resisting chemicals that could lead to premature bearing failure, VPL lubricants deliver a higher volume of oil to the bearings and can significantly prolong bearing life.

You can obtain solid oil in the following bearings:

  • Single row deep grove ball bearings
  • Insert Bearings (for mounted ball bearings)
  • Double row deep groove and angular contact ball bearings
  • Cylindrical roller and self aligning ball bearings
  • Spherical roller bearings
  • Tapered roller bearings

Normally we provide solid oil bearings without seals, as the solid oil has sufficient sealing properties. For harsh environments, we can also offer selected bearing types with seals.

On our website, we use different synonyms for “Solid Oil” to make it easier for our visitors to find the products and information they are looking for.

Here are the synonyms we use when referring to “Solid Oil”:





Advantages of Solid Oil

Solid oil, designed for use in situations where conventional relubrication techniques prove impractical, offers a range of benefits, such as:

BenefitVPLManual greasingAuto greaseAuto oil
High cleanlinessYesNoNoNo
Protection from contaminatesYesNoNoNo
Low preventive maintenanceYesNo*high cost*high cost
Chemical resistantYesNoNoNo
Lubricates as neededYesNoYesYes
No need to re-lubricateYesNoNoNo
Low operating costYesNoNoNo

*Automated lubrication systems have high initial cost, require ongoing maintenance, and continue to use grease or oil.

VPL40FB datasheet

Physical Property: Oil filled micro-porous polymer
Lubrication: Synthetic PAO and additives, NSF H1 (food safe)
Operating Temp: -50°C to 100°C
@ 40°C   SUS 762   cST146
@ 100°C   SUS 97   cST 19
Index: 141
Oil Specific Gravity: 0.86
Cu Corrosion: 1a
Additives: anti-corrosion, oxidation resistance, anti-wear
Color: blue

Solid oil limitations

Utilizing solid polymer lubricants imposes speed constraints on all bearings. Furthermore, solid polymer lubrication formulations come with specified upper limits for recommended operating temperatures.
These can be found in the chart below. To calculate speed limitation, use the following formula:

Maximum rpm = Ndm value / ((Outer diameter + Bore) * 0,5)

Bearing TypeNdm value
Single row deep grove ball bearings with steel cage, including ceramic hybrid300,000
Ball and Y-bearings with plastic cage40,000
Double row deep groove and angular contact ball bearings150,000
Cylindrical roller and self aligning ball bearings150,000
Spherical roller bearings84,000
Tapered roller bearings44,000