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Permanent Bearing Protection

The Original Bearing Isolator

As the inventor of the original Bearing Isolator, Inpro/Seal continues to be a leading provider of permanent bearing protection for a variety of applications. No matter the size or complexity of the application, Inpro/Seal’s technical experts can design a custom solution for your equipment.

Bearing failures lead to expensive downtime and lost production. With Inpro/Seal Bearing Isolators you can reduce maintenance costs and double the lifetime of your rotating equipment.

The Inpro/Seal Bearing Isolator is a two part dynamic seal consisting of a stator and a rotor attached to the shaft. The rotor and stator form a non-contacting compound labyrinth seal with no wearing parts – ensuring permanent protection. Multiple designs and custom engineering capabilities provide customers with the right solution for your application and operating environment.

The VB45-S Bearing Isolator is the new standard in Bearing Isolator Technology. This unique design provides IP66 rated contamination protection in a small 0.625 in. (15.88 mm) overall length. For more robust protection, the new VB45-U Bearing Isolator provides IP66 rated contamination protection and eliminates lubrication loss for both oil or grease lubricated equipment while also accommodating axial movement.

Keep contamination out. Keep lubrication in.

Features & Benefits

Patented bearing isolator design features protect in two ways. Here’s how…

  • Lubricant is captured in the inner portion of the labyrinth and flows back to the bearing housing.
  • Outside contamination attempting to enter the bearing housing is captured in the outer labyrinth paths and expelled through a port in the rotor by centrifugal force and gravity.

Features and Benefits:

  • Non-wearing, non-contacting, permanent bearing protection
  • Custom engineered for your specific application and operating environment
  • Split designs for ease of installation
  • Patented VBX Ring blocks moisture and condensation created by heating/cooling of bearing enclosures
  • Same day shipments available on most products, including new designs
  • Unconditional performance guarantee


The Inpro/Seal Bearing Isolator is a unique barrier for contamination ingress and lubrication retention for bearings installed in pumps, motors, gearboxes, pillow blocks, steam turbines, sleeve-bearing motors, paper machine rolls, and many other types of rotating equipment.

No matter the size or complexity of your application, Inpro/Seal can design an isolator to fit your specifications.

Industries Served: