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The function of the skeleton oil seal is generally to isolate the parts that need to be lubricated from the output parts in the transmission parts, so as not to let the lubricating oil leak. It is usually used for the rotating shaft and is a kind of rotating shaft lip seal. skeleton is like concrete inside the component rebar , Play a strengthening role, and make the oil seal maintain its shape and tension. According to the skeleton type, it can be divided into inner skeleton oil seal, outer skeleton oil seal, and inner and outer skeleton oil seal. Skeleton oil seal is made of high quality Nitrile rubber Made of steel plate, the quality is stable and the service life is long. Widely used in automobiles, motorcycle crankshafts, camshaft , Differential , shock absorbers, engine, Axle , front and rear wheels and other parts. 1. Prevent sediment, dust, water vapor, etc. from intruding into the bearing from the outside; 2. Limit the leakage of lubricating oil in the bearing. The requirement for the oil seal is the size ( the inside diameter of , outer diameter and thickness) should comply with the regulations; it is required to have appropriate elasticity, which can properly clamp the shaft and play a sealing role; it must be heat-resistant, wear-resistant, good in strength, resistant to media (oil or water, etc.), and has a long service life. long. Reasonable use of oil seal, should pay attention to the following points: (1) Shaft speed Due to design and structural reasons, high-speed shafts should use high-speed oil seals, and low-speed shafts should use low-speed oil seals. Low-speed oil seals cannot be used on high-speed shafts, and vice versa. (2) When the ambient temperature is high, polypropylene or silicon, fluorine, or silicon fluororubber should be selected. And try to reduce the oil temperature in the tank. When the operating temperature is too low, cold-resistant rubber should be selected. (3) Oil seals with average pressure have poor pressure bearing capacity, and the oil seal will be deformed when the pressure is too high. Under the condition of excessive pressure, a pressure-resistant support ring or a reinforced pressure-resistant oil seal should be used. (4) The degree of eccentricity on the installation When the eccentricity of the oil seal and the shaft is too large, the sealing performance will be deteriorated, especially when the shaft speed is high. If the eccentricity is too large, an oil seal with a "W" section can be used. (5) The surface finish of the shaft directly affects the service life of the oil seal, that is, the higher the finish of the shaft, the longer the service life of the oil seal. (6) Note that there should be a certain amount of lubricating oil on the lip of the oil seal. (7) Special attention should be paid to prevent dust from entering the oil seal. 

ABOUT OUR COMPANY

Taizhou Jiasheng Rubber & Plastic Co., Ltd.

Famous Rubber Oil Seal Manufacturers and Skeleton Oil Seal Suppliers in China, Company was established in 2000, we have specialized in the production of skeleton oil seals, O-rings, dust jackets, sheaths, rubber gaskets, protective coils and other seal products. It has a history of more than 20 years.
  • Strong R&D capabilities and a comprehensive rubber seal product line.

  • 3 rubber extrusion lines and 40 flat vulcanizing machines.

  • In addition to customized products, we also produce standard parts such as O-rings and oil seals..

  • Passed the tests of ROSH, FDA, PAHS and REACH.

  • Rubber Type: Natural rubber (NR). Nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR). Fluorine Rubber (FPM), Ethylene Propylene Rubber (EPDM), Silicone Rubber (SI), Neoprene Rubber (CR), Styrene Butadiene Rubber (SBR), Butyl Rubber (IIR), Butadiene Rubber (BR), Acrylate Rubber (ACM) ). We OEM/ODM Oil Seal.

Why choose us

Jiasheng Rubber & Plastic focuses on product research and development. We solve problems for customers from the source of design, strive for excellence in equipment, technology, quality control, etc., and continuously improve standards.

  • professional and dedicated

    We, Jiasheng, have been focusing on rubber products for 22 years. Production process design and program control make each batch of products more stable and traceable, and obtain high-efficiency production control.

  • innovating

    We have a strong R&D team to develop and design practical, durable, and rubber products, and we can also develop and produce products according to the drawings or samples provided by customers.

  • high quality

    We have our own laboratory and advanced testing equipment in the industry, constantly verify, pursue details, and create products that satisfy customers.

  • custom made

    It is our goal to fully communicate with customers, choose a better solution, and maximize the long-term interests of customers.

  • Brand Internationalization

    Layout overseas markets, provide diversified choices, and make the world fall in love with Chinese manufacturing.

  • After-sales service

    Continue to pay attention to the follow-up usage, and continuously improve the design, production, quality control and other links according to the feedback. Your satisfaction is the source of motivation for us to continue to do a good job.

Factory Show

Jiasheng has a strong technical force, has introduced internationally advanced production technology and imported rubber formula from Taiwan, and has a well-equipped rubber laboratory.

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Industry Knowledge Extension

How does a skeleton oil seal work?

A skeleton oil seal is a type of mechanical seal that is used to prevent the escape of lubricants, oils, and other fluids from a machine or mechanical component.

The frame of a skeleton oil seal is shaped like a thin, circular ring and is designed to fit snugly into a housing or bore in a mechanical component such as an engine, gearbox, or pump. The frame is covered with a flexible, elastomeric material that serves as the actual sealing element. The elastomeric material used in skeleton oil seals is typically made of rubber or silicone. The material is designed to be flexible and able to conform to the shape of the component it is sealing against.

When a skeleton oil seal is installed, it is positioned in the housing or bore so that the sealing element is in contact with the rotating shaft or another component that is rotating inside the housing. As the component rotates, a thin layer of oil or lubricant is created between the shaft and the sealing element. The sealing element then compresses against the rotating component, creating a barrier that prevents oil or other fluids from escaping.

The design of the skeleton oil seal allows for a certain amount of leakage to occur between the sealing element and the rotating component. This is necessary to provide lubrication to the component and prevent excessive wear and tear. However, the amount of leakage must be carefully controlled to prevent too much fluid from escaping and causing damage to the surrounding machinery.

To achieve this, the elastomeric material used in skeleton oil seals is designed to have a certain degree of stiffness or hardness. This allows the sealing element to compress against the rotating component with just the right amount of force, creating a seal that is tight enough to prevent fluid from escaping, but not so tight that it causes excessive wear or generates excessive heat.

Classification of skeleton oil seal

The type of skeleton used in the oil seal can affect its performance and suitability for specific applications. There are three main types of skeleton structures for oil seals: inner skeleton oil seals, outer skeleton oil seals, and inner and outer skeleton oil seals.

(1)Inner skeleton oil seals are designed to fit onto a shaft and are typically used to seal rotating components, such as gears or bearings. They consist of a metal frame that is covered with a rubber or elastomeric material, which forms the sealing surface. The metal frame is typically made from steel or stainless steel, and it provides the necessary rigidity and support to the seal.

The inner skeleton oil seal is installed on the shaft by pressing it into the housing bore, which allows the seal to make contact with the rotating component. The metal frame provides the necessary rigidity to the seal, while the rubber or elastomeric material provides the sealing function. Inner skeleton oil seals are commonly used in high-speed applications and can withstand high temperatures and pressures.

(2)Outer skeleton oil seals are designed to fit into a housing bore and are typically used to seal stationary components, such as pumps or motors. They consist of a metal frame that is covered with a rubber or elastomeric material, which forms the sealing surface. The metal frame is typically made from steel or stainless steel and provides the necessary rigidity and support to the seal.

The outer skeleton oil seal is installed in the housing bore and makes contact with the rotating component, creating a tight seal. The metal frame provides the necessary support to the seal, while the rubber or elastomeric material provides the sealing function. Outer skeleton oil seals are commonly used in low-speed applications and can withstand moderate temperatures and pressures.

(3)Inner and outer skeleton oil seals combine the features of both inner and outer skeleton seals, providing a dual sealing function. They are typically used in applications where the shaft and housing require sealing, such as in gearboxes or transmissions. They consist of a metal frame that is covered with a rubber or elastomeric material on both sides, which forms the sealing surfaces.

The inner and outer skeleton oil seal is installed by pressing it onto the shaft and into the housing bore, creating a tight seal between the two components. The metal frame provides the necessary support to the seal, while the rubber or elastomeric material provides the sealing function. Inner and outer skeleton oil seals are commonly used in high-speed applications and can withstand high temperatures and pressures.