Inch Seals Inch Seals

A grease seal, often called an oil or dirt seal, is a type of seal utilized to retain grease in a case or housing. Grease seals close spaces between stationary and moving components in mechanical equipment, helping prevent lubricant escape. Preventing harmful containments from entering machinery is another critical function of a grease seal. In a typical application, the grease seal is installed adjacent to a bearing, sealing in or sealing out, as necessary, the various liquids, gases or solids encountered by the particular mechanism.

Oil and grease seals are available in numerous lip materials. Popular materials include felt, leather, urethane, nitrile, polyacrylate, ethylene-acrylic or polyacrylic, silicone, fluoro-elastomer, tetrafluoro-ethylene propylene and PTFE. Use of one material over another is application specific, as materials will have different temperature and speed ranges. Grease seals also come in numerous constructions. Of particular note is the number of lips, with single and double lip being the most popular. Many popular styles of grease seals will utilize a spring on the lip to increase sealing capabilities. Some grease seals have a coated metal casing with a “rubber” lip while other seals will be a uniform with the lip material. Available in a wide array of sizes, both inch and metric, most grease seals are interchangeable between manufacturers. Critical dimensions on a grease seal include the inside diameter or bore (the OD of the shaft the seal rides on), the outside diameter (often called the housing bore) and the width. The ID and the OD are the most critical dimensions, as it is the grease seal lip that actually does the sealing. In most applications, a replacement seal that is thinner in width than the original will work, as it will still fit into the grove provided. Depending on this groove dimension, on occasion, a wider replacement seal will also work. Grease seals should not be confused with U Cups or Packings that are designed to handle higher pressure. A standard grease seal is designed to handle 7 or less PSI depending on the manufacturer.

Grease seals are generally the least expensive component in a mechanical system, but they serve to be the most important, as they protect the more expensive components, such as the bearings and gears. The most common failure mode for most bearings is a lack of or improper lubrication. The grease seal keeps the correct amount of lubrication in and the harmful contaminants out. Regularily checking and replacing the grease seal is a part of successful preventive maintenance programs.

A grease seal, often called an oil or dirt seal, is a type of seal utilized to retain grease in a case or housing. Grease seals close spaces between stationary and moving components in mechanical equipment, helping prevent lubricant escape. Preventing harmful containments from entering machinery is another critical function of a grease seal. In a typical application, the grease seal is installed adjacent to a bearing, sealing in or sealing out, as necessary, the various liquids, gases or solids encountered by the particular mechanism.

Oil and grease seals are available in numerous lip materials. Popular materials include felt, leather, urethane, nitrile, polyacrylate, ethylene-acrylic or polyacrylic, silicone, fluoro-elastomer, tetrafluoro-ethylene propylene and PTFE. Use of one material over another is application specific, as materials will have different temperature and speed ranges. Grease seals also come in numerous constructions. Of particular note is the number of lips, with single and double lip being the most popular. Many popular styles of grease seals will utilize a spring on the lip to increase sealing capabilities. Some grease seals have a coated metal casing with a “rubber” lip while other seals will be a uniform with the lip material. Available in a wide array of sizes, both inch and metric, most grease seals are interchangeable between manufacturers. Critical dimensions on a grease seal include the inside diameter or bore (the OD of the shaft the seal rides on), the outside diameter (often called the housing bore) and the width. The ID and the OD are the most critical dimensions, as it is the grease seal lip that actually does the sealing. In most applications, a replacement seal that is thinner in width than the original will work, as it will still fit into the grove provided. Depending on this groove dimension, on occasion, a wider replacement seal will also work. Grease seals should not be confused with U Cups or Packings that are designed to handle higher pressure. A standard grease seal is designed to handle 7 or less PSI depending on the manufacturer.

Grease seals are generally the least expensive component in a mechanical system, but they serve to be the most important, as they protect the more expensive components, such as the bearings and gears. The most common failure mode for most bearings is a lack of or improper lubrication. The grease seal keeps the correct amount of lubrication in and the harmful contaminants out. Regularily checking and replacing the grease seal is a part of successful preventive maintenance programs.

Sort by:
Show:
    • .125 x .313 x .094 AO NBR .125 x .313 x .094 AO NBR

      .125 x .313 x .094 AO NBR Nitrile Material Type AO Single Lip - Rubber Coated - No Spring Pressure Rating: Max 7 psi Mounting: Press-fit Comments: Rubber covered O.D.... .125 x .313 x .094 AO NBR Nitrile Material Type AO Single Lip - Rubber Coated - No Spring Pressure Rating: Max 7 psi Mounting: Press-fit Comments: Rubber covered O.D....
      $3.55
    • .125 x .313 x .125 AO NBR .125 x .313 x .125 AO NBR

      .125 x .313 x .125 AO NBR Nitrile Material Type AO Single Lip - Rubber Coated - No Spring Click For More Information .125 x .313 x .125 AO NBR Nitrile Material Type AO Single Lip - Rubber Coated - No Spring Click For More Information
      $3.55
    • .187 x .631 x .250 A NBR .187 x .631 x .250 A NBR

      .187 x .631 x .250 A NBR Nitrile Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:... .187 x .631 x .250 A NBR Nitrile Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:...
      $3.55
    • .187 x .750 x .250 A NBR .187 x .750 x .250 A NBR

      .187 x .750 x .250 A NBR Nitrile Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:... .187 x .750 x .250 A NBR Nitrile Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:...
      $3.55
    • .250 x .500 x .125 BODL NBR .250 x .500 x .125 BODL NBR

      .250 x .500 x .125 BODL NBR Nitrile Material Type BODL Double Lip - Metal Case - No Spring Click For More Information .250 x .500 x .125 BODL NBR Nitrile Material Type BODL Double Lip - Metal Case - No Spring Click For More Information
      $4.13
    • .250 x .500 x .188 ADL FPM .250 x .500 x .188 ADL FPM

      .250 x .500 x .188  ADL FPM Viton Material Type ADL Double Lip - Rubber Coated with Spring Spring Make: Carbon Steel – Stainless Available Pressure Rating: Max 7psi Mounting: Press-fit... .250 x .500 x .188  ADL FPM Viton Material Type ADL Double Lip - Rubber Coated with Spring Spring Make: Carbon Steel – Stainless Available Pressure Rating: Max 7psi Mounting: Press-fit...
      $27.39
    • .250 x .500 x .188 BO NBR .250 x .500 x .188 BO NBR

      .250 x .500 x .188  BO NBR Nitrile Material Type BO Single Lip - Metal Case - No Spring Pressure Rating: Max 7psi Mounting: Press-fit Comments: Precision ground O.D. with... .250 x .500 x .188  BO NBR Nitrile Material Type BO Single Lip - Metal Case - No Spring Pressure Rating: Max 7psi Mounting: Press-fit Comments: Precision ground O.D. with...
      $4.13
    • .250 x .500 x .188 ADL FPM .250 x .500 x .188 ADL FPM

      .250 x .500 x .188 ADL FPM Viton Material Type ADL Double Lip - Rubber Coated with Spring Spring Make: Carbon Steel – Stainless Available Pressure Rating: Max 7psi Mounting:... .250 x .500 x .188 ADL FPM Viton Material Type ADL Double Lip - Rubber Coated with Spring Spring Make: Carbon Steel – Stainless Available Pressure Rating: Max 7psi Mounting:...
      $27.39
    • .250 x .750 x .250 ADL NBR .250 x .750 x .250 ADL NBR

      .250 x .750 x .250  ADL NBR Nitrile Material Type ADL Double Lip - Rubber Coated with Spring Spring Make: Carbon Steel – Stainless Available Pressure Rating: Max 7psi Mounting:... .250 x .750 x .250  ADL NBR Nitrile Material Type ADL Double Lip - Rubber Coated with Spring Spring Make: Carbon Steel – Stainless Available Pressure Rating: Max 7psi Mounting:...
      $4.13
    • .250 x .750 x .250 A FPM .250 x .750 x .250 A FPM

      .250 x .750 x .250A FPM Viton Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting: Press-fit... .250 x .750 x .250A FPM Viton Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting: Press-fit...
      $23.82
    • .250 x .750 x .250 A NBR .250 x .750 x .250 A NBR

      .250 x .750 x .250 A NBR Nitrile Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:... .250 x .750 x .250 A NBR Nitrile Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:...
      $3.55
    • .312 x .500 x .102 AO NBR .312 x .500 x .102 AO NBR

      .312 x .500 x .102 AO NBR Nitrile Material Type AO Single Lip - Rubber Coated - No Spring Pressure Rating: Max 7 psi Mounting: Press-fit Comments: Rubber covered O.D.... .312 x .500 x .102 AO NBR Nitrile Material Type AO Single Lip - Rubber Coated - No Spring Pressure Rating: Max 7 psi Mounting: Press-fit Comments: Rubber covered O.D....
      $3.55
    • .313 x .625 x .156 B FPM .313 x .625 x .156 B FPM

      .313 x .625 x .156 B FPM  Viton Material  Type B Single Lip - Metal Case with Spring  Spring Make: Carbon Steel - Stainless Available   Pressure Rating: Max 7psi   Mounting:... .313 x .625 x .156 B FPM  Viton Material  Type B Single Lip - Metal Case with Spring  Spring Make: Carbon Steel - Stainless Available   Pressure Rating: Max 7psi   Mounting:...
      $23.82
    • .313 x .688 x .109 AO NBR .313 x .688 x .109 AO NBR

      .313 x .688 x .109 AO NBR Nitrile Material Type AO Single Lip - Rubber Coated - No Spring Pressure Rating: Max 7 psi Mounting: Press-fit Comments: Rubber covered O.D.... .313 x .688 x .109 AO NBR Nitrile Material Type AO Single Lip - Rubber Coated - No Spring Pressure Rating: Max 7 psi Mounting: Press-fit Comments: Rubber covered O.D....
      $3.55
    • .313 x .688 x .313 A NBR .313 x .688 x .313 A NBR

      .313 x .688 x .313 A NBR Nitrile Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:... .313 x .688 x .313 A NBR Nitrile Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:...
      $3.55
    • .313 x .750 x .250 A FPM .313 x .750 x .250 A FPM

      .313 x .750 x .250 A FPM Viton Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:... .313 x .750 x .250 A FPM Viton Material Type A Single Lip - Rubber Coated with Spring Spring Make: Carbon Steel - Stainless Available Pressure Rating: Max 7psi Mounting:...
      $23.82
Show:
Just added to your wishlist:
My Wishlist
You've just added this product to the cart:
Go to cart page