Seals

Industrial seals keep lubricants in and contaminants out at the points where a rotating shaft passes through a housing, protecting bearings, gearboxes, and pumps from the moisture and debris that cause premature wear. An oil seal (also called a lip seal) uses a flexible sealing lip that rides against the rotating shaft, maintaining contact through spring tension while allowing the shaft to turn freely. An O-ring seal, by contrast, is a static or semi-dynamic seal — a simple round cross-section ring compressed between two mating surfaces to block leakage at a joint, flange, or cylinder bore, rather than sealing a continuously rotating shaft. Understanding how O-ring seals work helps explain why proper groove sizing and compression are critical: too little compression allows leakage, while too much accelerates wear and can cause the seal to fail. 3BG Supply Co. stocks oil seals and O-ring seals across a wide range of materials and dimensions, alongside our shaft covers line for guarding the same rotating components these seals protect.

Superior Leak Prevention

Our O-ring face seal fittings and rubber O-ring seals provide exceptional sealing capabilities, preventing fluid or gas leakage in critical systems.

Versatile Applications

From automotive to heavy machinery, industrial oil seals and types of industrial seals cater to a wide range of applications, ensuring optimal performance and durability.

Durable & Reliable Performance

We partner with top industrial seals manufacturers to supply premium-quality seals designed to withstand extreme temperatures, pressure, and chemical exposure.

Find the right Seals for your needs.

  • Brand
  • Category
  • Bore / Inner Diameter Inch
  • Bore / Inner Diameter MM
  • Outside Diameter Inch
  • Outside Diameter MM
  • Shaft Inner Diameter Inch
  • Shaft Inner Diameter MM
  • Bore Outer Diameter Inch
  • Bore Outer Diameter MM
  • Width Inch
  • Width MM
  • Height Inch
  • Height MM
  • Seal Type
  • Material
  • Lip Style
  • Rating
  • Accessory
  • Price

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    Why Choose 3BG Supply for Industrial Seals?

    At 3BG Supply, we provide an extensive selection of industrial seals, including O-ring face seals, oil seals, and custom sealing solutions. Our experts help you find the right types of industrial seals for your specific application, ensuring durability and efficiency.

    FAQs

    What is an oil seal, and how does it work?

    An oil seal (or lip seal) uses a flexible sealing lip, typically backed by a garter spring, that rides against a rotating shaft to keep lubricant inside a housing while blocking contaminants from entering. The spring maintains constant contact pressure against the shaft as it rotates, which is what keeps the seal effective over time.

    What is an O-ring seal used for?

    An O-ring seal is a round cross-section ring, usually made of rubber or an elastomer, compressed between two mating surfaces to block leakage at a static or slow-moving joint, such as a flange, cylinder bore, or fitting. Unlike an oil seal, it's not typically designed for continuously rotating shafts.

    How do O-ring seals work?

    O-ring seals work by being compressed into a groove between two surfaces, deforming slightly to fill any microscopic gaps and block fluid or gas from passing through the joint. Proper groove sizing is essential — the O-ring needs enough compression to seal effectively without being over-compressed, which can cause premature failure.

    How do I seal a leaking O-ring?

    A leaking O-ring typically needs to be replaced rather than repaired, since damage like cracking, flattening, or chemical degradation generally can't be reversed. Before installing the replacement, inspect the groove and mating surfaces for damage or debris that may have caused the original leak.

    What's the difference between an industrial seal and an O-ring seal?

    Industrial seal is a broad term covering oil seals, O-rings, gaskets, and other sealing components used throughout mechanical equipment, while an O-ring seal refers specifically to the round cross-section ring style used at static or semi-dynamic joints. The right type depends on whether you're sealing a rotating shaft or a stationary joint.

    What materials are oil seals and O-ring seals available in?

    Common materials include nitrile (Buna-N) for general-purpose use, Viton for higher heat and chemical resistance, and silicone or EPDM for specific temperature or fluid compatibility needs. Matching the seal material to your application's temperature range and fluid exposure is important for long service life.

    Industrial Seals Manufacturers