175x200x15 B2 NBR Rotary Shaft Oil Seal Single Lip

What Is the 175x200x15 B2 NBR Oil Seal?

The 175x200x15 B2 NBR Rotary Shaft Oil Seal is a heavy-duty radial shaft seal engineered to retain lubricants while protecting rotating equipment from dust, dirt and moisture. Manufactured from NBR (Nitrile Butadiene Rubber) and reinforced with a B2 metal outer case, it provides exceptional dimensional stability, secure housing retention and dependable sealing performance in demanding industrial environments.

With dimensions of 175 mm inner diameter, 200 mm outer diameter and 15 mm width, this oil seal is designed for large rotating shafts used in industrial gearboxes, pumps, speed reducers, processing equipment, mining machinery, agricultural machines and heavy-duty OEM applications. Its single spring-loaded sealing lip maintains continuous contact with the shaft, delivering reliable lubricant retention and long operational life.

Design and Construction

The B2 design combines a rigid metal outer shell with a precision-moulded elastomer sealing element.

Key construction features include:

• B2 metal outer case
• Single sealing lip
• Integrated garter spring
• NBR sealing material
• Precision sealing edge
• High dimensional stability
• Secure interference fit in the housing

The metal outer case increases structural rigidity and ensures accurate installation, while the spring-loaded sealing lip maintains constant radial pressure on the shaft throughout the seal's service life.

Technical Specification

Manufacturer: GRN

Product Type: Rotary Shaft Oil Seal

Design: B2

Material: NBR (Nitrile Butadiene Rubber)

Inner Diameter: 175 mm

Outer Diameter: 200 mm

Width: 15 mm

Outer Case: Metal

Sealing Lip: Single

Garter Spring: Yes

Colour: Black

How Does a Rotary Shaft Oil Seal Work?

A rotary shaft oil seal creates a dynamic sealing interface between a rotating shaft and a stationary housing.

The spring-loaded sealing lip continuously contacts the shaft surface to:

• Prevent lubricant leakage
• Protect bearings
• Exclude dust and contaminants
• Prevent moisture ingress
• Extend equipment service life
• Improve operational reliability

The metal outer case ensures stable positioning within the housing, maintaining sealing performance even under demanding operating conditions.

Why Choose NBR?

NBR is the most commonly used elastomer for industrial rotary shaft seals due to its balanced mechanical and sealing properties.

Key advantages include:

• Excellent resistance to mineral oils
• Good compatibility with lubricating greases
• High abrasion resistance
• Good mechanical strength
• Excellent elasticity
• Reliable long-term sealing performance
• Cost-effective solution for industrial machinery

These characteristics make NBR an excellent choice for general industrial oil sealing applications.

Selecting the Correct Oil Seal

When selecting a rotary shaft oil seal, consider:

• Shaft diameter
• Housing bore diameter
• Seal width
• Sealing material
• Operating temperature
• Shaft speed
• Lubricant type
• Working environment
• Shaft surface condition

Correct seal selection is essential for achieving maximum sealing efficiency and service life.

Installation Recommendations

For reliable performance:

• Clean the housing before installation.
• Inspect the shaft sealing surface.
• Lubricate the sealing lip before assembly.
• Use the correct installation tools.
• Press the seal evenly into the housing.
• Avoid damaging the sealing lip during installation.

Proper installation significantly extends seal service life.

Common Causes of Oil Seal Failure

Typical causes include:

• Worn shaft surfaces
• Incorrect installation
• Contamination
• Dry running
• Excessive shaft runout
• High operating temperatures
• Incorrect material selection
• Insufficient lubrication

Routine inspection and preventive maintenance help maximize sealing performance.

Industrial Applications

The 175x200x15 B2 NBR Oil Seal is widely used in:

• Industrial gearboxes
• Speed reducers
• Heavy-duty pumps
• Mining equipment
• Steel industry machinery
• Agricultural machinery
• Industrial conveyors
• Processing equipment
• Manufacturing machinery
• Industrial drive systems
• OEM production
• Industrial MRO maintenance

OEM Manufacturing and Industrial Maintenance

Rotary shaft oil seals are essential components for protecting rotating machinery and extending equipment life.

For OEM manufacturers and maintenance engineers, they help:

• Prevent lubricant leakage
• Protect bearings against contamination
• Reduce maintenance costs
• Extend machine service life
• Improve equipment reliability
• Minimize unexpected downtime

The robust B2 construction is particularly well suited for large shaft diameters and heavy industrial applications.

Why Engineers Choose B2 Oil Seals

• Metal outer case for maximum housing stability
• Single spring-loaded sealing lip
• Excellent resistance to mineral oils
• High wear resistance
• Low-friction operation
• Long operational service life
• Suitable for OEM manufacturing and industrial maintenance
• Reliable sealing performance in heavy-duty rotating equipment

Frequently Asked Questions (FAQ)

What does the B2 design mean?

B2 indicates a rotary shaft oil seal with a metal outer case designed to provide excellent dimensional stability and secure housing retention, particularly for larger shaft diameters.

Does this oil seal include a garter spring?

Yes. The single sealing lip incorporates a garter spring that maintains constant radial sealing pressure throughout its service life.

Is NBR resistant to mineral oils?

Yes. NBR offers excellent resistance to mineral oils, lubricating greases and many petroleum-based lubricants commonly used in industrial machinery.

Can this oil seal be used in industrial gearboxes?

Yes. It is widely used in industrial gearboxes, pumps, reducers, heavy machinery and numerous rotating industrial systems.

Why is a metal outer case important?

The metal outer case increases structural rigidity, improves housing retention and provides greater dimensional stability, especially in large-diameter sealing applications.

Where is this oil seal commonly installed?

It is commonly installed in industrial machinery, mining equipment, agricultural machines, conveyor systems, heavy-duty pumps, OEM equipment and industrial MRO applications.