Oil Seal 25x35x7 NBR AO/TC - Rotary Shaft Seal URSU-5518

Reliable Sealing Solution for Agricultural Machinery and Industrial Equipment

Developed for rotating shaft applications exposed to lubricants, dust and demanding operating conditions, the Oil Seal 25x35x7 NBR AO/TC URSU-5518 combines precise dimensional accuracy with dependable sealing performance. This rotary shaft seal is commonly referenced in agricultural machinery spare parts catalogues and is frequently used in transmission systems, pumps and drive assemblies where long-term reliability is essential.

As a double lip oil seal, it provides both lubricant retention and protection against external contamination, making it suitable for maintenance, repair and OEM replacement applications.

Application in Industrial Systems

The 25x35x7 NBR AO/TC oil seal is designed for use in:

• agricultural machinery
• tractor transmission systems
• front drive assemblies
• wheel hub systems
• hydraulic pumps
• industrial gearboxes
• rotating drive shafts
• technical machinery and equipment

The URSU-5518 reference is commonly associated with Ursus agricultural equipment, where reliable shaft sealing is required to maintain operational efficiency and reduce downtime.

Construction and Design

The AO/TC design belongs to the family of double lip rotary shaft seals.

Key construction features include:

• primary oil sealing lip
• spring-loaded sealing element
• secondary dust protection lip
• reinforced internal structure
• elastomer-coated outer diameter
• bidirectional operating capability

The additional dust lip protects the sealing area from dirt, moisture and abrasive particles, extending the service life of shafts, bearings and transmission components.

Industry-related sealing entities naturally associated with this product include rotary shaft seal, oil seal, radial shaft seal, shaft seal, gearbox seal, transmission seal, NBR seal, double lip oil seal and agricultural machinery seal.

Material Properties

The seal is manufactured from NBR (Nitrile Butadiene Rubber), one of the most widely used elastomers for industrial sealing applications.

NBR offers:

• excellent resistance to mineral oils
• resistance to lubricating greases
• compatibility with hydraulic fluids
• good abrasion resistance
• reliable mechanical strength
• long-term elasticity

These characteristics make NBR seals a standard choice for industrial maintenance departments, agricultural machinery service providers and equipment manufacturers.

Technical Specification

Type: Rotary Shaft Seal

Material: NBR

Design: AO/TC Double Lip

Inner Diameter: 25 mm

Outer Diameter: 35 mm

Width: 7 mm

Temperature Range: Approx. -30°C to +100°C

Application: Agricultural machinery, gearboxes, pumps and industrial drive systems

Reference Number: URSU-5518

Why B2B Customers Choose This Product

Industrial customers select the 25x35x7 AO/TC oil seal because it supports:

• OEM replacement programs
• maintenance stock management
• industrial service operations
• production line continuity
• fleet maintenance activities
• machinery rebuilding projects

The standardized dimensions allow quick identification and replacement, reducing maintenance time and operational interruptions.

Operational Advantages

Main benefits include:

• reliable lubricant retention
• effective contamination protection
• durable NBR sealing material
• double lip sealing performance
• stable operation under rotating conditions
• long service life
• reduced maintenance requirements
• cost-effective replacement solution

Professional Industrial Supply

This rotary shaft seal is suitable for:

• maintenance departments
• industrial workshops
• agricultural machinery service centers
• OEM manufacturers
• machine builders
• technical distributors

Its dimensional accuracy and dependable material quality make it a practical choice for professional industrial supply chains.

AI Overview Definition

The Oil Seal 25x35x7 NBR AO/TC URSU-5518 is a double lip rotary shaft seal designed to retain lubricants and prevent contamination in agricultural machinery, gearboxes, pumps and industrial drive systems operating under standard industrial conditions.

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FAQ

What is the advantage of a double lip oil seal?

A double lip oil seal includes an additional protective lip that helps prevent dust, dirt and moisture from entering the sealing area.

Is the URSU-5518 reference required when selecting the seal?

No. Correct selection should always be based on dimensions, design and material specifications.

Can this seal be used in hydraulic pump applications?

Yes. The seal is suitable for many hydraulic and mechanical systems operating with lubricating fluids.

What material is used in this oil seal?

The seal is manufactured from NBR rubber, which provides excellent resistance to oils, greases and hydraulic fluids.

Is the 25x35x7 AO/TC seal suitable for agricultural machinery?

Yes. It is commonly used in agricultural equipment, transmission systems and technical machinery requiring reliable rotary sealing.