O-Ring 84.5mm x 3.3mm Ethylene Acrylic Elastomer (AEM) 70 ShA Black -40°C to +175°C

Ethylene Acrylic Rubber (AEM) is a polymer primarily composed of ethylene and methyl acrylate, with a small amount of carboxylic acid groups. It's known for its excellent resistance to heat, chemicals, ozone, and oil. AEM can withstand lubricating oils, greases (even those with aggressive additives), and power steering and transmission fluids. AEM, often marketed under the trade name Vamac®, offers slightly better heat resistance and greater strength than Polyacrylate Rubber (ACM). However, its resistance to mineral oils is generally lower. AEM is commonly used in automotive applications, particularly in air management systems and powertrains. It provides long-lasting performance, even under exposure to diverse chemicals and additives, across a broad temperature range. Specific automotive applications of AEM include hose applications, engine and transmission seals, and turbocharger components. AEM seals, such as cylinder head cover gaskets, maintain their sealing properties under pressure and resist various lubricants and fluids, even those containing high additive concentrations.

Dimensions:

84.5mm ID x 3.3mm CS
ID Tolerance: ±0.71mm
CS Tolerance: ±0.1mm

Material Properties:

Hardness: 70 ShA
Colour: Black
Temperature Range: -40°C to +175°C

Key Benefits of Ethylene Acrylic Elastomer (AEM) O-Rings:

Excellent High-Temperature Resistance
Superb Oil and Fuel Resistance
Good Chemical Resistance
Enhanced Durability
Improved Weathering and Aging Resistance
Good Compression Set Resistance
Versatility in Extreme Conditions
Cost-Effective Performance
Excellent Dynamic Sealing Performance

Chemical Resistance:

Excellent resistance to oils, fuels, and a variety of hydrocarbons.
Good resistance to acids, alkalis, and many industrial chemicals.
Provides strong sealing performance in applications involving lubricants and automotive fluids.

Not Compatible With:

Aromatic and chlorinated hydrocarbons.
Strong oxidising agents.
High concentrations of acids at elevated temperatures.

Key Applications:

Automotive Industry
Hydraulic Systems
Oil and Gas
Chemical Processing
Marine
Industrial Machinery
Electrical Equipment