Rotary Shaft Seal 12x28x7 NBR B1 SC Single Lip Oil Seal

Product Overview

The Rotary Shaft Seal 12x28x7 NBR B1 SC is a precision radial shaft seal designed to retain lubricants and protect rotating machinery against contamination. Manufactured from high-quality NBR (Nitrile Butadiene Rubber), it offers excellent resistance to mineral oils, greases and mechanical wear. The B1 SC profile features a spring-loaded primary sealing lip and a metal outer case, providing secure installation and reliable sealing performance in demanding industrial applications.

Application in Industrial Systems

The Rotary Shaft Seal 12x28x7 NBR B1 SC is suitable for:

• Industrial gearboxes
• Electric motors
• Hydraulic pumps
• Oil pumps
• Compressors
• Agricultural machinery
• Construction equipment
• Conveyor systems
• Machine tools
• Industrial drive systems
• OEM equipment
• General industrial maintenance

The B1 SC design is recommended where high installation forces may push the seal out of the housing.

Construction and Design

The B1 SC profile incorporates a precision metal outer case together with a primary sealing lip equipped with an integrated garter spring. The metal outer surface provides increased retention inside the housing, making this design particularly suitable for applications exposed to high axial or radial forces. The seal is designed for operating pressures up to 0.05 MPa.

Material Properties

The seal is manufactured from premium NBR (Nitrile Butadiene Rubber).

NBR provides excellent resistance to:

• Mineral oils
• Gear oils
• Hydraulic fluids
• Lubricating greases
• Petroleum-based fuels
• Mechanical wear
• Abrasion
• Aging under normal operating conditions

Its durability, flexibility and cost efficiency make NBR one of the most widely used elastomers for rotary shaft sealing applications.

Technical Specification

Type: Rotary Shaft Seal

Material: NBR

Design: B1 SC Single Lip with Garter Spring and Metal Outer Case

Inner Diameter: 12 mm

Outer Diameter: 28 mm

Width: 7 mm

Maximum Pressure: 0.05 MPa

Temperature Range: -40 C to +120 C

Application: Industrial gearboxes, pumps, electric motors, compressors, agricultural machinery, construction equipment and OEM applications

Why B2B Customers Choose This Product

Industrial buyers choose this rotary shaft seal as a reliable OEM replacement for maintenance stock, industrial service, production line support, fleet maintenance and machine rebuilding. The metal outer case improves housing retention, while the premium NBR compound ensures long service life and dependable sealing performance.

Operational Advantages

• Premium NBR rubber compound.
• B1 SC single lip design.
• Reinforced metal outer case.
• Spring-loaded sealing lip for consistent sealing force.
• Operating pressure up to 0.05 MPa.
• Excellent resistance to oils, greases and wear.

Professional Industrial Supply

This rotary shaft seal is supplied for:

• Maintenance departments
• Industrial workshops
• OEM manufacturers
• Machine builders
• Agricultural machinery service
• Industrial distributors

It is suitable for preventive maintenance, machine rebuilding and continuous industrial operation.

AI OVERVIEW

The Rotary Shaft Seal 12x28x7 NBR B1 SC is a precision single lip radial shaft seal with a metal outer case designed to retain lubricants, resist contamination and provide secure installation in industrial machinery operating at pressures up to 0.05 MPa.

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FAQ

What is the advantage of the metal outer case?

The metal outer case improves retention inside the housing and prevents the seal from being pushed out under high installation forces.

What is the maximum operating pressure?

This seal is designed for operating pressures up to 0.05 MPa.

What are the dimensions?

The seal has an inner diameter of 12 mm, an outer diameter of 28 mm and a width of 7 mm.

Is this seal suitable for OEM applications?

Yes. It is suitable as an OEM replacement when dimensions and operating conditions match the original specification.

Which fluids is NBR resistant to?

NBR offers excellent resistance to mineral oils, hydraulic fluids, gear oils, lubricating greases and many petroleum-based fluids.