Gearbox Bearing Protection

Eliminate Constant Oil Leaks and Continuous Maintenance

The Importance of Bearing Protection

Gearboxes are a significant component in the industrial process and can be found within a variety of industries. Unfortunately, they can be unreliable and difficult to maintain due to constant oil leaks from ineffective sealing solutions. Lubrication loss and contamination ingress into the bearing housing are two of the most common reasons for premature bearing failure on gearboxes, leading to unexpected downtime and high maintenance costs.

Gearbox with Inpro/Seal Bearing Isolator
STS Bearing Isolator

A Superior Sealing Solution

Inpro/Seal’s multiple gearbox Bearing Isolator designs are perfect sealing solutions for the variety of gearboxes in your facility. The Inpro/Seal Bearing Isolator is a compound labyrinth seal that keeps contamination out of the bearing housing and lubrication in, significantly increasing gearbox reliability.

For non-flooded bearings, with oil levels below the shaft, the non-contacting VB45-U and Double Runner Bearing Isolator designs permanently protect against contamination ingress and lubrication loss.

For flooded bearings, with oil levels above the shaft, the STS Bearing Isolator combines Bearing Isolator technology with a contact seal to significantly increase sealing capabilities.

Read More

To learn how it works, watch our Bearing Isolator video.

Bearing Isolator Designs for Gearboxes

VB45-S Bearing Isolator cutaway


The IP66 rated VB45-U Bearing Isolator is a robust design for non-flooded gearboxes in severe environments.
Double Runner Bearing Isolator

Double Runner

The Double Runner Bearing Isolator, designed specifically for non-flooded gearboxes, utilizes dual rotors for increased oil retention.
STS Bearing Isolator


The STS Bearing Isolator combines a contact seal with Bearing Isolator technology for flooded gearboxes.

Facts at a Glance

Inpro/Seal Bearing Isolators on gearboxes:

  • Permanently protect against contamination ingress and lubrication loss
  • Extend gearbox life by increasing bearing reliability
  • Can be split for ease of installation and immediate retrofit
  • Do not groove or damage the shaft
  • Are maintenance free
  • Are custom engineered
  • Are backed by our best-in-class performance guarantee
Same day shipment paperwork

Same-Day Shipments

Inpro/Seal is committed to making sure you have the right technology, right when you need it. We know that time is money. That’s why we offer same-day shipments on most Bearing Isolators, even new and custom designs. If you require same-day shipments on an Inpro/Seal Bearing Isolator, contact your local Inpro/Seal Representative.

Increase Reliability. Decrease Costs.

Inpro/Seal increases reliability and enhances performance on rotating equipment across multiple industries with permanent bearing protection and complete shaft seals. Read more about our innovative technologies or the industries we serve.

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Ready to Get Started?

Count on us to improve gearbox reliability through permanent bearing protection. With over 40 years of experience, we are the trusted source of Bearing Isolator technology.

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