CU

The CU style is a double excluder lipped seal for added protection in extremely dirty or wet environments. The two lips open during bearing re-lubrication to allow excess grease to be flushed from the bearing cavity. This seal features an elastomer locator lip that positions the seal onto the bearing cone for easy, accurate assembly. Rubber on the seal I.D. provides a positive seal against the shaft. The heavy-gauge steel case is clamped between the cone back face and the shaft shoulder. The face can be rubber covered unless heavy clamping pressure precludes using rubber on the seal outside face or where space is limited. This seal is generally used in agricultural equipment.

Design

The rubber outside diameter provides optimized sealing ability in the housing, also at considerable surface roughness or in split housings. The beads on the outside diameter provide improved sealing ability and retention in the bore. They also prevent spring-back during installation.

The spring-loaded sealing lip contributes to a quick response in handling dynamic runout and maintaining the sealing performance, even when sealing lip wear is excessive.

Sealing lip and flex section are optimally balanced to withstand both high dynamic runout and shaft-to-bore misalignment. The auxiliary lip on HMSA10 seals is non-contacting, which means that the seals normally can operate at the same speeds as the single-lip HMS5 seals.

Material

The rubber outside diameter provides optimized sealing ability in the housing, also at considerable surface roughness or in split housings. The beads on the outside diameter provide improved sealing ability and retention in the bore. They also prevent spring-back during installation.

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The spring-loaded sealing lip contributes to a quick response in handling dynamic runout and maintaining the sealing performance, even when sealing lip wear is excessive.

Sealing lip and flex section are optimally balanced to withstand both high dynamic runout and shaft-to-bore misalignment. The auxiliary lip on HMSA10 seals is non-contacting, which means that the seals normally can operate at the same speeds as the single-lip HMS5 seals.

Applications and operating conditions

HMS5 and HMSA10 seals are designed for oil or grease lubricated applications with operating temperatures ranging from –40 to +100 °C (–40 to +210 °F), short-term up to 120 °C (250 °F). These seals are also appropriate for sealing lubricants within a wide range of viscosities.