CORTECO 19026781B 21x29.5x6 mm NBR SCJY Rotary Shaft Seal

AI Overview

The CORTECO 19026781B is a premium OEM-quality rotary shaft seal designed for reliable sealing of rotating shafts in automotive and industrial applications. With dimensions of 21x29.5x6 mm, it is manufactured from NBR (Nitrile Butadiene Rubber) and features the specialized SCJY sealing profile. This design provides dependable oil retention, low friction and long service life while protecting mechanical assemblies against lubricant leakage and contamination. It is commonly used in power steering systems, hydraulic pumps, steering gear assemblies and other precision rotating components.

What Makes This Model Different?

The CORTECO 19026781B is engineered for demanding automotive sealing applications.

Key advantages include:

• Genuine CORTECO product
• OEM-quality manufacturing
• SCJY sealing profile
• Premium NBR elastomer
• Spring-loaded sealing lip
• Precision dimensional accuracy
• Excellent oil resistance
• Low friction operation
• High wear resistance
• Long service life

Construction and Operating Principle

The seal consists of:

• Primary sealing lip
• Garter spring
• Reinforced steel insert
• NBR elastomer body

The spring-loaded sealing lip maintains constant radial pressure against the rotating shaft, ensuring reliable lubricant retention while minimizing friction and wear.

Its precision design provides:

• Reliable oil sealing
• Smooth shaft operation
• Reduced wear
• Stable sealing pressure
• Long operational life

Material Properties

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

Material benefits include:

• Excellent resistance to mineral oils
• Very good grease resistance
• Good resistance to hydraulic fluids
• High abrasion resistance
• Good elasticity
• Reliable ageing resistance
• Stable mechanical properties
• Long service life

NBR remains one of the most widely used elastomers for rotary shaft sealing applications.

Typical Applications

Typical applications include:

• Power steering systems
• Hydraulic pumps
• Steering gear assemblies
• Gearboxes
• Industrial transmissions
• Rotating shafts
• Agricultural machinery
• Construction equipment
• Industrial machinery
• Hydraulic equipment

Typical Failure Symptoms

Replacement is recommended if any of the following symptoms occur:

• Oil leakage
• Grease leakage
• Hardened sealing lip
• Shaft wear
• Excessive friction
• Visible seal damage
• Contamination entering the assembly
• Reduced sealing efficiency

Recommended During Maintenance

During installation it is recommended to inspect:

• Shaft sealing surface
• Housing bore
• Bearing condition
• Shaft alignment
• Lubrication quality
• Installation depth
• Adjacent sealing components
• Hydraulic fluid condition
• Mating components
• Proper installation tools

Technical Specification

Manufacturer: CORTECO

Part Number: 19026781B

Type: Rotary Shaft Seal

Design: SCJY

Material: NBR (Nitrile Butadiene Rubber)

Inner Diameter: 21 mm

Outer Diameter: 29.5 mm

Width: 6 mm

Spring: Yes

Dust Lip: No

Operating Temperature: Suitable for the operating temperature range typical of NBR rotary shaft seals.

Application: Power steering systems, hydraulic pumps, steering gear assemblies, gearboxes and rotating mechanical components requiring a 21x29.5x6 mm rotary shaft seal.

Cross References

Manufacturer References

• CORTECO 19026781
• CORTECO 19026781B

Always verify dimensions and technical specifications before installation.

Related Components

Frequently replaced together with:

• Shaft bearings
• Hydraulic pump bearings
• O-rings
• Hydraulic seals
• Repair sleeves
• Retaining rings
• Hydraulic oil
• Assembly grease
• Bearing housings
• Installation tools

Why B2B Customers Choose CORTECO

Professional workshops and industrial customers choose CORTECO because of:

• OEM-quality production
• Freudenberg sealing technology
• Precision manufacturing
• Long service life
• Reliable sealing performance
• Consistent production quality
• Wide industrial compatibility
• Trusted global reputation

Professional Industrial Supply

This product is regularly supplied to:

• Automotive workshops
• Steering system repair specialists
• Hydraulic service companies
• Industrial maintenance departments
• Machinery manufacturers
• Technical distributors
• Agricultural equipment service providers
• Mechanical workshops
• OEM replacement specialists
• Production facilities

Popular Searches

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FAQ

What does SCJY mean?

SCJY is a specialized rotary shaft seal design developed for precise sealing of rotating shafts in steering, hydraulic and automotive applications.

Why is NBR used?

NBR provides excellent resistance to mineral oils, greases and hydraulic fluids while offering high wear resistance and long service life.

Is the seal supplied ready for installation?

Yes. The seal is supplied fully assembled and ready for professional installation.

Where is the CORTECO 19026781B commonly used?

It is widely used in power steering systems, hydraulic pumps, steering gear assemblies and other rotating mechanical applications requiring a 21x29.5x6 mm oil seal.

Should the shaft be inspected before replacing the seal?

Yes. A worn or damaged shaft surface can significantly reduce sealing performance and shorten the service life of the new seal.