What is a Bearing Isolator?

An Inpro Bearing Isolator is a mechanical device that isolates a bearing from its environment, so that the bearing will be kept properly lubricated and uncontaminated throughout its projected design-life.

What makes it work?

The Inpro/Seal Bearing Isolator is manufactured in two parts: a rotor and a stator. The rotor revolves with the shaft, driven by a tightly fitting drive ring that is fixed to the shaft. It also has a stationary component that is fixed to the bearing housing with a press fit and O-ring gasket.

Why would I use an Inpro/Seal Bearing Isolator?

By maintaining bearings under ideal (laboratory) operating conditions, rotating equipment will last 5 to 10 times longer than without permanent bearing isolation. Pumps, motors, pillow blocks, fans, gears and turbines are dramatically more reliable and productive. Costs of maintenance and operations go down and productivity goes up. Innovative technology is truly a wonderful thing.

How long will an Inpro/Seal last?

Since there is neither mechanical contact nor friction, heat or wear, the Inpro/Seal Bearing Isolator will outlast the bearings and other mechanical components of the rotating equipment it is designed to protect. 7 to 15 years of constant service is not long in the life of an Inpro/Seal Bearing Isolator.

How do I install an Inpro/Seal?

We recommend using a hand arbor press to fit the Inpro/Seal Bearing Isolator stator into the housing cover. It has a .003" (.0762 mm) diametric interference fit. Don't panic if you shear the outside O-ring gasket. It means you have a secure installation. Press it into the beginning of the insertion "ramp". Keep it as straight as possible. It can be tapped into perpendicularity with the shaft prior to start-up.

How do I order an Inpro/Seal "VBX" Bearing Isolator?

Specify the inside, outside and overall length dimensions. Measure the shaft, the housing bore and distance to first outside obstruction. We suggest making the stator O.D. 1" (26 mm) over the shaft O.D. and an overall axial length of .700" (17.78 mm). We will, however, make it to any dimension that is convenient for you.

What if I'm not satisfied with my Inpro/Seal Bearing Isolator?

Inpro has an unconditional performance guarantee. If you are not satisfied that it is working to your satisfaction, Inpro will either modify the Isolator to your satisfaction or refund your purchase price. Your complete satisfaction is important to us.

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