Standard Bearing Isolator Installation Video

Standard Bearing Isolator Installation

This video is intended for standard Inpro/Seal Bearing Isolator installations, such as on ANSI pumps and NEMA motors. For installation instructions on other equipment or more complex designs, please follow the installation instructions in the box or contact your local Inpro/Seal Representative. As always, make sure you are wearing proper PPE for this installation.

When unboxing your new Inpro/Seal Bearing Isolator, verify the following components are present:

  • Bearing Isolator
  • Lubrication Packet
  • Installation Instructions

Do not try to separate the Bearing Isolator parts as it is a one-piece assembly.

Remove the equipment cover, making sure to note the 6 o'clock or downward position of the housing face. Then, verify the correct bore size to ensure a 0.002 interference fit. In some cases, the cover will need to be modified. The standard minimum cross section is ½ inch overall, but can differ based on design.

Lubricate the gasket o-ring on the OD of the Bearing Isolator.

Using a hand arbor press, install the Bearing Isolator assembly. Check for proper orientation by verifying the expulsion port is at the 6 o'clock, or down, position. A puck or square blank should be used to press the Bearing Isolator evenly into the cover. Do not hammer the Bearing Isolator directly into the cover. Upon pressing the Bearing Isolator into the cover, visually ensure it is fully and squarely seated, assuring a secure interference fit. Do not press in the Bearing Isolator past the shoulder, if present.

Lightly lubricate the shaft with the supplied lubricant.

Slide the cover with the installed Bearing Isolator over the shaft and into position by pushing on the outboard face of the Bearing Isolator, not the cover. This prevents rotor/stator separation and ensures the Bearing Isolator remains properly seated into the cover.

Once the equipment is assembled, verify the shaft turns freely and the Bearing Isolator rotor turns true with the stator.

Inpro/Seal Bearing Isolators can be installed on pumps, motors, pillow blocks, gearboxes and a variety of other rotating equipment. For installation instructions on other equipment or more complex designs, visit or contact your local Inpro/Seal Representative.

Facts at a Glance

Inpro/Seal Bearing Isolators:

  • Permanently protect against contamination ingress
  • Permanently seal against lubrication loss
  • Increase bearing life and reliability
  • Can be split for ease of installation
  • Are custom engineered to fit your equipment
  • Are backed by our best-in-class performance guarantee

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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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