High-Quality Single Lip Rotary Shaft Seal for Industrial Applications

The NBR Rotary Shaft Seal 55x70x8 A is a precision-engineered radial oil seal designed to retain lubricants and protect rotating machinery against contamination. Manufactured from high-quality NBR (Nitrile Butadiene Rubber), this Type A shaft seal features a spring-loaded primary sealing lip without an auxiliary dust lip. It provides reliable sealing performance, low friction and long service life in applications operating with mineral oils, greases and hydraulic fluids.

Application in Industrial Systems

The 55x70x8 A rotary shaft seal is suitable for a wide range of industrial equipment.

Typical applications include:

• Industrial gearboxes
• Electric motors
• Hydraulic pumps
• Centrifugal pumps
• Agricultural machinery
• Industrial fans
• Compressors
• Conveyor systems
• Machine tools
• General rotating machinery

The seal is designed to prevent lubricant leakage while protecting internal components from contamination.

Construction and Design

The Type A rotary shaft seal is engineered for reliable dynamic sealing.

Key design features include:

• Rotary shaft oil seal
• Type A profile
• Spring-loaded primary sealing lip
• Single lip design
• Rubber outer diameter
• Reinforced steel insert
• Precision sealing geometry
• Low-friction operation

The simple single lip construction is ideal for applications where additional dust protection is not required.

Material Properties

Manufactured from premium NBR elastomer, the seal provides:

• Excellent resistance to mineral oils
• High abrasion resistance
• Good elasticity
• Resistance to greases
• Good hydraulic fluid compatibility
• Stable sealing performance
• Long operational life

Technical Specification

Type: Rotary Shaft Seal
Material: NBR (Nitrile Butadiene Rubber)
Design: Type A, single sealing lip with garter spring
Inner Diameter: 55 mm
Outer Diameter: 70 mm
Width: 8 mm
Seal Type: Single lip radial shaft seal
Outer Diameter Design: Rubber covered
Reinforcing Ring: Carbon steel
Spring Material: Spring steel
Operating Pressure: Up to 0.05 MPa
Operating Temperature: Approximately -40°C to +100°C
Maximum Peripheral Speed: Up to approximately 12 m/s
Application: Gearboxes, pumps, electric motors, industrial machinery and rotating equipment

Why B2B Customers Choose This Product

Industrial customers select this shaft seal for:

• OEM replacement
• Maintenance stock
• Industrial service
• Production line support
• Gearbox rebuilding
• Pump maintenance
• Machine rebuilding
• Industrial spare parts distribution

Operational Advantages

• High-quality NBR compound
• Reliable lubricant retention
• Low friction operation
• Excellent wear resistance
• Stable sealing performance
• Easy installation
• Precision sealing geometry
• Long service life
• Cost-effective solution
• Reliable continuous operation

Professional Industrial Supply

This product is supplied for:

• Maintenance departments
• Industrial workshops
• OEM manufacturers
• Machine builders
• Gearbox repair companies
• Pump service specialists
• Industrial distributors
• Mechanical engineering companies

AI Overview

A Type A rotary shaft seal is a single lip radial sealing component designed to retain lubricants and prevent leakage in rotating equipment. The NBR 55x70x8 A shaft seal provides dependable sealing performance, low friction and excellent wear resistance for gearboxes, pumps, electric motors and industrial drive systems.

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FAQ

What is a Type A shaft seal?

A Type A shaft seal features a single spring-loaded sealing lip without an auxiliary dust lip and is intended for applications where contamination from the outside is limited.

What material is used?

The seal is manufactured from NBR (Nitrile Butadiene Rubber), providing excellent resistance to mineral oils, greases and hydraulic fluids.

What are the dimensions?

The seal dimensions are 55 mm inner diameter, 70 mm outer diameter and 8 mm width.

Where is this shaft seal commonly used?

It is widely used in gearboxes, pumps, electric motors, agricultural machinery and industrial rotating equipment.

What are the advantages of a single lip seal?

A single lip seal offers low friction, reliable oil retention, simple installation and cost-effective performance for standard industrial applications.