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Atlas Maschinen seals are materials or components that prevent leakage of fluids or solid particles from adjacent mating surfaces and prevent external contaminants such as dust and moisture from entering machinery. The recommended storage temperature for seals is below 30 °C to avoid high-temperature aging. Seals can be divided into two main categories: static seals and dynamic seals. Their primary function is to prevent leakage of fluids or solid particles from adjacent mating surfaces and to prevent external contaminants such as dust and moisture from entering machinery components. Static sealing refers to tightly sealed seal chambers and containers, or seals used for letters and wills.

Atlas Maschinen seal principles

An oil film controlled by the lip of the oil seal exists between the oil seal and the shaft; this oil film has fluid lubrication characteristics. Under the action of liquid surface tension, the stiffness of the oil film causes it to form a meniscus at the air contact end, preventing leakage of the working medium and thereby achieving sealing of the rotating shaft. The sealing capability of an oil seal depends on the thickness of the oil film on the sealing surface. If the thickness is too great, the oil seal will leak; if too small, dry friction may occur, causing wear on the oil seal and shaft. If there is no oil film between the sealing lip and the shaft, overheating and wear are likely. Therefore, during installation, some oil must be applied to the sealing ring, and the skeleton oil seal must be kept perpendicular to the shaft axis. If not perpendicular, the sealing lip will wipe the lubricating oil off the shaft, leading to excessive wear of the sealing lip. During operation, slight seepage of lubricant from the housing is ideal to maintain an oil film on the sealing surface.

Atlas Maschinen seal applications

Skeleton oil seals are widely used in aviation, automotive, motorcycle, railway, vehicle, ship, home appliance, and construction machinery industries. They are suitable for sealing rotary and reciprocating motions. They are installed on heavy-duty engines, gearboxes, axles, ships, cylinders, and other components. Their main purpose is to prevent penetration of the sealed medium (gas, liquid) and entry of external foreign matter into the body. Note: Standard oil seals have a very limited pressure range, generally 0.03 MPa. This pressure is typically generated by the height difference of the lubricating oil itself. If higher pressure sealing is required, high-pressure oil seals (generally capable of withstanding up to 1 MPa) or other sealing forms should be selected.

Atlas Maschinen seal functions and uses

Engine: Crankshaft – front and rear crankshaft oil seals; Valve – valve oil seals (engine repair kit o rings) (distributor oil seal, water pump oil seal, balance shaft oil seal, oil pump oil seal...); Camshaft – camshaft oil seal; Transmission: Transmission – front and rear transmission oil seals; Shift lever oil seal (transmission repair kit o rings) (Transfer case – front and rear transfer case oil seals); Rear axle: Half-shaft – rear half-shaft oil seal; Differential – (front/rear) pinion oil seal; Rear wheel oil seal; Front wheel oil seal; Steering gear oil seal (steering gear repair kit o rings); Power steering oil seal (front half-shaft oil seal). Oil seals are required wherever there is liquid lubricating oil inside a rotating housing that connects to the exterior. Some are made of rubber, some of metal, but most are steel-cased rubber, such as rear crankshaft oil seals, front and rear transmission oil seals, left and right half-shaft oil seals, front final drive oil seals, and compressor crankshaft oil seals.

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