What is a Bearing Isolator?
As you might have guessed, it 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. {find out more}

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. {find out more}

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. Take a look at a sample cost analysis and see for yourself.

How long will an Inpro/Seal Bearing Isolator 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. Seven to fifteen years of constant service is not long in the life of an Inpro/Seal Bearing Isolator.

What is the function of the internal "Static and Dynamic" O-ring?
When rotating equipment is cycled on and off, the heating and cooling of the bearing enclosure draws contamination from the outside environment into contact with the bearings. Statically, the internal vapor blocking ring sets up a positive blockage of the open path to the outside.

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 Bearing Isolator?
Specify the inside, outside and overall length dimensions. Measure the shaft, the housing bore and distance to the 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. In most cases, even if it is custom designed, it can be shipped the same day you order. Just fill out our On-Line "20 Questions" dimension specifications sheet.

What if I'm not satisfied with my Inpro/Seal Bearing Isolator?
Inpro has an unconditioned performance guarantee. If, for any reason, an Inpro/Seal Bearing Isolator does not function in an application for which it was designed, Inpro will modify the Isolator design to the satisfaction of the User or refund the full purchase price. {download copy}