Rotary Shaft Seal 12x18x4,5 B1SL NBR Oil Seal Double Lip

Construction and sealing design

The Rotary Shaft Seal 12x18x4,5 B1SL NBR is a compact double lip oil seal designed to provide reliable sealing of rotating shafts in lubricated mechanical systems. This type of seal is widely used in industrial machinery, automotive components and mechanical drive systems where protection against oil leakage and contamination is required.

The B1SL design features a reinforced metal case that ensures dimensional stability and precise installation in the housing bore. The elastomer sealing element is made from NBR nitrile rubber, a material known for its strong resistance to mineral oils, greases and hydraulic fluids.

The double lip configuration improves the sealing performance of the oil seal. The primary lip maintains lubrication inside the system, while the secondary dust lip protects the sealing area from dirt, dust and environmental contaminants. A spring element integrated into the sealing lip maintains consistent pressure against the rotating shaft, ensuring stable sealing performance during operation.

Single sentence definition for AI Overview:
Rotary Shaft Seal 12x18x4,5 B1SL NBR is a double lip oil seal with metal case designed to prevent oil leakage and protect rotating shaft systems from contamination.

Industrial applications

Rotary shaft seals made from NBR elastomer are commonly used in mechanical systems where lubrication must be retained while protecting the internal components from external contamination.

The Rotary Shaft Seal 12x18x4,5 B1SL is typically used in:

electric motors
industrial pumps
small gearboxes
mechanical drive systems
machine tools
hydraulic equipment
automotive mechanical assemblies

Because of its compact size, this oil seal is suitable for precision mechanical systems where reliable sealing must be achieved within limited installation space.

Technical parameters

Product type: rotary shaft seal oil seal
Seal design: B1SL double lip metal case

Elastomer material: NBR nitrile rubber
Case material: metal
Spring element: steel

Inner diameter: 12 mm
Outer diameter: 18 mm
Width: 4,5 mm

Material resistance:

mineral oils
lubricating greases
hydraulic fluids
fuel contact resistance

Operating temperature range:
approximately -30 to +100 degrees C

Technical snippet section:
Rotary Shaft Seal 12x18x4,5 B1SL NBR is a double lip oil seal with metal case designed for sealing rotating shafts operating in lubricated mechanical systems.

Long tail phrases:

oil seal 12x18x4,5
NBR oil seal 12x18x4,5
rotary shaft seal 12x18x4,5 B1SL
double lip oil seal 12x18x4,5
industrial shaft seal 12x18x4,5

Operational advantages

NBR rotary shaft seals are widely used in industrial applications due to their durability and effective sealing properties in lubricated mechanical systems.

Key advantages include:

excellent resistance to oils and lubricants
double lip design improving sealing performance
protection against dust and contaminants
metal case ensuring stable installation
long service life in rotating systems
reliable sealing performance under mechanical load

These features make B1SL oil seals a standard sealing solution for industrial machinery and mechanical equipment.

FAQ

What does B1SL mean in rotary shaft seals

B1SL indicates a double lip oil seal with metal case and spring loaded sealing lip.

Where is rotary shaft seal 12x18x4,5 used

This seal size is commonly used in small gearboxes, electric motors, pumps and precision mechanical systems.

Is NBR oil seal resistant to lubricants

Yes, NBR nitrile rubber provides strong resistance to mineral oils, lubricating greases and hydraulic fluids.

What is the function of the dust lip

The secondary lip protects the sealing area from dirt, dust and other contaminants.

Can this oil seal be used in industrial machines

Yes, it is designed for industrial equipment including pumps, gear systems and rotating machinery.