Oil Seal 40x58x8 NBR TC BASL Rotary Shaft Seal

Construction and design

Oil seal 40x58x8 NBR AO BASL is a rotary shaft seal designed to provide reliable sealing between rotating shafts and stationary housing components in industrial machinery. This product belongs to the category of shaft oil seals NBR oil seals widely used in mechanical equipment, hydraulic systems and power transmission units.

The seal is built with a reinforced metal case that provides structural stability when installed in the housing. The elastomer sealing lip made from NBR nitrile rubber is vulcanized to the metal insert, forming a durable sealing interface that maintains contact with the rotating shaft surface.

The AO BASL design includes a primary sealing lip supported by a garter spring which maintains constant pressure against the shaft. In addition, the oil seal features a secondary dust lip that protects the sealing area from external contamination such as dust, dirt and fine particles. This dual lip configuration increases service life and reliability of the sealing system.

The combination of metal reinforcement, flexible nitrile rubber and a spring loaded sealing lip allows the oil seal to maintain performance both during rotation and when the shaft is stationary.

Industrial applications

Within the category of shaft oil seals NBR oil seals, the 40x58x8 model is widely used in industrial machinery, gearboxes, pumps and mechanical drives. Rotary shaft seals of this type are installed wherever rotating components require protection against oil leakage and external contamination.

Oil seal 40x58x8 NBR AO BASL is commonly used in electric motors, industrial pumps, gear units, agricultural machines and various types of mechanical transmissions. The nitrile rubber material provides good resistance to mineral oils, lubricants and many technical fluids used in industrial systems.

Because of its double lip construction, the seal also performs well in applications where environmental protection is required, helping to prevent dust and particles from entering the sealing zone.

Dimensional compatibility

The designation 40x58x8 represents the inner diameter of 40 mm, outer diameter of 58 mm and the seal width of 8 mm. These dimensions correspond to commonly used rotary shaft seal sizes compliant with ISO 6194 and DIN 3760 standards.

This dimensional configuration allows the oil seal to fit standard housing grooves used in many mechanical assemblies. When installed correctly, the sealing lip maintains controlled contact with the shaft surface, ensuring efficient sealing performance and long operational life.

Search queries related to this size often include oil seal 40x58x8 NBR, rotary shaft seal 40x58x8, NBR oil seal 40x58x8 BASL and shaft seal 40x58x8.

Operational advantages

Oil seals manufactured from NBR nitrile rubber are widely used because of their durability and chemical resistance. The NBR compound provides good resistance to mineral oils, lubricants and many industrial fluids commonly present in gearboxes and hydraulic systems.

The BASL double lip construction offers additional protection against contaminants, improving reliability of the sealing system. The integrated garter spring ensures consistent radial pressure on the shaft surface, which helps maintain sealing performance over long operating periods.

These design features make the oil seal suitable for a wide range of industrial applications where rotating shafts require reliable sealing and protection against leakage.

Technical specification

Type: rotary shaft oil seal
Design: AO BASL double lip with dust lip
Material: NBR nitrile rubber
Inner diameter: 40 mm
Outer diameter: 58 mm
Width: 8 mm
Reinforcement: metal case
Spring: garter spring included
Application: sealing rotating shafts in industrial machinery
Standards: ISO 6194, DIN 3760

FAQ

What is an oil seal 40x58x8 NBR AO BASL used for
It is used to seal rotating shafts in gearboxes, pumps, motors and other industrial machinery.

What does the BASL design mean
BASL indicates a double lip rotary shaft seal with a spring loaded primary lip and an additional dust lip for contamination protection.

Is NBR suitable for oil sealing applications
Yes. NBR nitrile rubber offers good resistance to mineral oils, lubricants and many industrial fluids.

Where are rotary shaft seals typically installed
They are installed in housings where rotating shafts pass through mechanical assemblies such as gearboxes, pumps and motors.

What is the function of the garter spring in the seal
The garter spring maintains constant pressure of the sealing lip against the shaft surface to ensure reliable sealing.