pillow block seal

INPRO/SEAL

Pillow blocks are essential for supporting rotating shafts in industrial and power transmission equipment, yet they often cause unexpected downtime due to bearing failure. This is typically the result of contaminants entering the bearing housing or lubrication escaping over time. Although pillow blocks are built for long-term use, traditional sealing methods like LER or LOR rings rely on tight clearances and simple gap-style designs. These seals are ineffective at keeping out dirt and moisture, and they allow valuable lubrication to leak, leading to premature bearing wear.

In some cases, grease-purging is used to create a barrier, but this method is labour-intensive and unreliable. Without consistent upkeep, grease-purged seals lose their effectiveness quickly and leave equipment vulnerable. A more dependable solution is needed to ensure performance and reduce maintenance demands.

The Inpro/Seal Bearing Isolator addresses this challenge by offering permanent protection against contamination ingress and lubricant loss. Its non-contacting design eliminates the wear common with traditional seals and is built to last the entire life of the equipment. This dramatically increases mean time between repair (MTBR), cuts down on maintenance costs, and helps keep operations running smoothly without frequent interruptions. Designed for easy integration into standard pillow block setups, this upgrade delivers consistent, long-term performance without the need for constant greasing or repairs.

FEATURES AND BENEFITS:

  • Precision-fit stator and rotor connection provides IP66-rated, long-lasting protection from dust, moisture, and debris entering the bearing housing

  • A built-in contamination chamber captures incoming particles and expels them efficiently using centrifugal force and gravity

  • A specialized groove design recovers oil from the shaft and channels it back into the housing to reduce lubricant loss

  • Coalescing rings prevent grease from escaping along the shaft and leaking into the surrounding environment

  • A compact 45-degree chamber holds the sealing ring in place while reducing the overall footprint of the design

  • The integrated VBX ring stops vapour contaminants from forming or entering due to temperature shifts within the bearing enclosure