Information about Bearing Isolators

Bearing isolators are dynamic seals designed to protect bearings from outside contaminants. They are comprised of a rotor (rotating) and stator (stationary) member. Some bearing isolators are of labyrinth construction while others use O-rings or other positive seals. The most important specifications to consider when searching for bearing isolators are the dimensions. These include shaft outer diameter or seal inner diameter, housing bore diameter or seal outer diameter, and axial cross section or thickness. The shaft outer diameter or seal inner diameter refers to the size of the seal inside diameter or the shaft or piston outside diameter. The housing bore diameter or seal out diameter refers to the size of the housing bore diameter or the seal outside diameter. The axial cross section or thickness refers to the axial cross section, or thickness, of the seal.

Products & Services Related to Bearing Isolators

Back-up Rings

Back-up rings or anti-extrusion rings are washer-like devices used to prevent seals from extruding through gaps while under pressure. Seals are installed in the downstream side of the gland.

Dynamic Seals

Dynamic seals include oil seals, hydraulic and pneumatic seals, exclusion seals, labyrinth seals, bearing isolators, and piston rings. They create a barrier between moving and stationary surfaces in applications such as rotating shafts and pistons rings. This is a general search form; more detailed search forms are available.

Exclusion Seals

Exclusion seals are comprised of wipers, scrapers and V-ring seals.

Hydraulic Seals and Pneumatic Seals

Hydraulic seals and pneumatic seals include piston seals, rod seals, U-cups, vee, cup, and flange packings.

Oil Seals and Grease Seals

Oil seals and grease seals have a flexible lip that rubs against a shaft or housing to prevent the leakage or ingress of fluids and dirt.