Solid oil bearings

JOJI Solid Oil bearings are designed for applications with high humidity and occasional contact with water and other contaminants. Bearings using Solid Oil are lubricated for life and cannot be relubricated.

Solid Oil:

A polymer material is molded into the bearing. The polymer absorbs saturated lubricant and forms small gaps around the rolling elements, cage, and raceways, allowing the bearing to rotate freely.
The polymer material in Solid Oil has a porous structure with millions of microscopic pores, which lock the lubricant within the polymer material through surface tension.
This fills nearly all free space within the bearing.
During operation, the lubricant is released into the smallest gaps, providing effective minimal lubrication.

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Bearing Features
Long Service Life

Increased operating temperatures promote lubricant flow to the polymer surface, continuously lubricating the bearing. During downtime, any excess lubricant is reabsorbed into the polymer.

Extended Lubricant Service Life

Solid Oil bearings utilize a significant amount of lubricant during operation (two to four times that of conventional grease).
The polymer structure of Solid Oil eliminates lubricant churning.
Solid Oil is a high-quality synthetic oil with excellent oxidation resistance.

Washout Resistance

Solid Oil resists washing out and fills virtually all free space within the bearing, limiting the amount of moisture and contaminants that can enter the bearing.
Water is incompatible with lubricating oil or solid oil polymers.

Virtualizes lubricant leakage

Solid oil retains the lubricant within the bearing.
Integrated bearing seals further enhance lubricant retention.

Protects against contaminants

Solid oil's close contact with the rollers and raceways significantly reduces contaminant ingress.
The integrated seals in Solid Oil bearings provide additional sealing protection.