FPM 40x62x8 TC Double Lip Oil Seal FKM Viton

What Is the FPM 40x62x8 AO Double Lip Oil Seal?

The FPM 40x62x8 AO Double Lip Oil Seal is a radial shaft seal manufactured from FPM (FKM, Viton®) fluoroelastomer. The dimensions 40x62x8 mm represent a 40 mm shaft diameter, 62 mm outside diameter, and 8 mm width. The AO (TC) design incorporates two sealing lips: a primary spring-loaded sealing lip that retains lubricants and a secondary dust lip that protects the sealing area against dirt, dust and moisture.

Applications

The FPM 40x62x8 AO Oil Seal is commonly used in:

• Internal combustion engines
• Gearboxes
• Hydraulic pumps
• Industrial pumps
• Compressors
• Hydraulic systems
• Industrial machinery
• Agricultural equipment
• Construction machinery
• Automotive applications
• OEM equipment
• High-temperature industrial systems

Technical Specification

Product Type: Radial Shaft Oil Seal

Design: AO (TC) Double Lip

Material: FPM / FKM (Viton®)

Shaft Diameter: 40 mm

Outside Diameter: 62 mm

Width: 8 mm

Primary Sealing Lip: Spring-loaded

Secondary Dust Lip: Yes

Colour: Brown

Operating Temperature: Approximately -20°C to +200°C

Chemical Resistance

The FPM (FKM) sealing material provides excellent resistance to:

• Mineral oils
• Synthetic oils
• Lubricating greases
• Gasoline
• Diesel fuel
• Hydraulic fluids
• Gear oils
• Ozone
• UV radiation
• Many aggressive industrial chemicals

Why Choose FPM FKM Viton®?

FPM (FKM) is designed for demanding sealing applications where conventional NBR materials cannot provide sufficient thermal or chemical resistance.

Key advantages include:

• Excellent high-temperature resistance
• Outstanding resistance to oils and fuels
• Superior chemical resistance
• Excellent ageing resistance
• UV and ozone resistance
• Low compression set
• Long service life
• Excellent dimensional stability

Hydraulic and Industrial Applications

The 40x62x8 AO FPM Oil Seal is widely used where both reliable lubricant retention and protection against external contamination are required. The additional dust lip helps prevent dirt and moisture from entering the sealing area, improving equipment reliability and extending component life.

Installation Recommendations

Before installation, verify:

• Shaft surface condition
• Housing dimensions
• Shaft alignment
• Material compatibility with the operating fluid
• Operating temperature
• Proper lubrication of the sealing lip during assembly

Correct installation significantly increases seal life and minimizes the risk of leakage.

Frequently Asked Questions (FAQ)

What does AO mean?

AO (TC) identifies a double lip radial shaft seal featuring a spring-loaded primary sealing lip and an additional dust lip.

Are FPM and FKM the same material?

Yes. FKM is the international ASTM material designation, while FPM is the equivalent ISO/DIN designation. Viton® is a registered trademark for a family of FKM fluoroelastomers.

Is this oil seal suitable for gasoline and diesel fuel?

Yes. FPM provides excellent resistance to gasoline, diesel fuel, oils and many industrial chemicals.

Can it be used at high temperatures?

Yes. The standard operating temperature range is approximately -20°C to +200°C, depending on the application.

Where is the AO oil seal commonly used?

It is widely used in engines, gearboxes, pumps, hydraulic systems, compressors and industrial machinery operating in demanding environments.