TB55x75x8 Shaft Oil Seal Double Lip

Shaft oil seal

In machinery, a device that prevents the passage of fluids along a rotating shaft. Seals are necessary when a shaft extends from a housing (enclosure) containing oil, such as a pump or a gear box.

A common type of shaft seal consists of an elastomer (elastic rubberlike) ring bonded to a metallic ring that is a press (tight) fit in the hole in the housing through which the shaft extends. The sealing is done by a lip on the elastomer ring that is pressed snugly around the shaft by a helically wound garter spring. When properly designed and installed, the lip rides on a film of lubricant about 0.0001 inch (0.0025 millimetre) thick. If the film gets too thick, fluid  leaks; if it is too thin, the lip gets hot, and the seal may fail. Leather, synthetic rubber, and silicones are among the materials used for the sealing ring.

Gearbox oil seal

A gearbox oil seal is a component of a transmission system that helps to keep the transmission fluid inside the gearbox. It is a rubber seal that fits around the outside edge of the gearbox, preventing the fluid from leaking out and contaminating the surrounding area.

Auto oil seal structure 
The oil seal is generally composed of three basic components: sealing element, metal shell and clamping
spring.Types of oil seals include single and double lips, rubber or polymer, metal housing, spring loaded, and internal, externaland axial guides. 

Rational use of oil seal
1, the air filter must maintain a good technical state, otherwise the dust in the air into the cylinder, on the one hand, accelerate the wear of the cylinder and piston ring, on the other hand, with the lubricating oil along the cylinder wall into the oil pan pollution oil, causing the wear of the oil seal, resulting in oil leakage.
2. Clean and qualified lubricating oil should be used. If there are impurities in the oil, its entry into the lip will not only accelerate the wear of the lip and the journal, but also destroy the surface tension of the oil film, resulting in oil seal oil leakage. Some machines add a regenerative oil or mixed oil to the diesel engine, where the use of this oil diesel engine, crankshaft oil seal oil leakage is particularly serious. Because the viscosity of this oil is too low, it cannot form a sealing oil film.
3, the diesel engine is not allowed to overspeed or speed changes. All kinds of seals have a specified linear speed, such as the crankshaft shaft seal of the SI95 diesel engine, the linear speed of the journal should be less than 15 meters/second, more than this speed will make the temperature of the oil seal lip, accelerate the aging of rubber, accelerate the lip wear. The frequent change of speed will destroy the lubricating oil film at the lip border, make the lip directly contact with the journal, and accelerate the wear of the lip.

Oil seal seal is not tight and oil leakage countermeasures

1, master and identify the basic knowledge of shoddy products, choose high quality, standard oil seal.

2, installation, if the outer surface roughness of the shaft diameter is low or there are rust, rust, burr and other defects, to use fine abrasive cloth or oil stone polishing smooth; Apply cleaning oil or lubricating grease to the lip of the oil seal or the corresponding position of the shaft diameter. The outer ring of the oil seal is coated with sealant, and the key slot on the shaft is wrapped with stiff paper to avoid scratching the lip of the oil seal. The oil seal is rotated inward and pressed into it with special tools. Do not smash hard and punch hard to prevent the oil seal from deforming or breaking the spring and failing; If there is lip flanging, spring off and oil seal skew, it must be removed and reloaded. It should be noted that: when the shaft diameter is not worn and the oil seal spring is sufficiently elastic, do not tighten the inner spring without authorization

3, applied to the mechanical oil seal general working conditions are harsh, the environmental temperature difference is large, dust, vibration frequently so that the mechanical parts of the stress situation is constantly changing, to check, maintenance and maintenance.

4, such as axle diameter and bearing wear serious; Oil seal rubber aging or spring failure, etc., should be repaired and replaced in time.

5, abnormal heating parts or assemblies should be timely troubleshooting; Avoid mechanical overspeed and overload operation to prevent oil seal lip temperature rise, rubber aging, early lip wear and so on.

6, to often check the oil level, if the oil impurities are too much, there are alloy powder, metal iron filings to completely replace the new oil. The brand and quality of the oil change should meet the requirements of the season. It is recommended to add Metre Super sealer & Lubricant to the oil, it is an excellent gearbox additive, can form an inert material film on the components, it can slow the leakage of the oil seal, extend the service life of the oil seal gear, but also reduce the noise of the gearbox, the use of this Metre super seal lubricant will not cause pollution or deterioration of the oil.

our advantages
1.  We cooperate with first-class raw material suppliers in China and abroad, using the best raw materials. High quality NBR, silicon and FKM materials are imported from Japan,USA, Germany and Southeast Asia.

2. Top quality custom rubber products that can completely meet your needs.

3. Fast production & in-time delivery that never delay your project and usage.

4. One-stop custom service and value-added service to save your time and cost.

5. OEM/ODM Services are available. We can design and produce various Non-standard
    Rubber Parts according to your PDF,3D or STEP drawing files.

6. All of rubber finished products are 100% inspected before shipment.