CORTECO 12013338 NBR COMBI Rotary Shaft Seal 74x91x12

OEM Drive Shaft Seal for Agricultural and Commercial Vehicle Applications

CORTECO 12013338 is a premium rotary shaft seal engineered for drive shaft and axle drive assemblies operating under demanding agricultural and commercial vehicle conditions. Manufactured from high-quality NBR (Nitrile Butadiene Rubber) and incorporating the proven COMBI sealing design, it provides dependable lubricant retention while protecting critical drivetrain components against dust, mud, water and abrasive contaminants. Designed as a direct OEM replacement, it delivers long service life and reliable sealing performance.

Application in Industrial Systems

CORTECO 12013338 is commonly installed in:

• Drive shafts
• Axle drive systems
• Final drives
• Mechanical transmissions
• Agricultural tractors
• Harvesting equipment
• Commercial vehicles
• Industrial rotating shafts
• Power transmission units
• Heavy-duty drivetrain assemblies

OEM Compatibility:

• CLAAS: 7700021091
• RENAULT TRUCKS: 7700021091

Its COMBI sealing construction is intended for machinery operating under continuous mechanical loads in dusty, muddy and wet environments.

Construction and Design

The COMBI sealing concept combines several sealing elements into one compact heavy-duty assembly.

Key design features include:

• COMBI sealing technology
• Multiple sealing lips
• Reinforced metal casing
• Precision radial sealing lip
• Stable shaft contact
• Effective contamination barrier
• High wear resistance
• Extended operating life

The design minimizes lubricant leakage while protecting bearings and transmission components against external contamination.

Material Properties

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

Material advantages include:

• Excellent resistance to mineral oils
• High grease compatibility
• Good abrasion resistance
• Reliable elasticity
• Stable mechanical properties
• Good aging resistance
• Long operational service life
• Cost-effective maintenance solution

NBR is widely used in rotary shaft seals, oil seals, axle seals, gearbox seals, transmission seals and industrial sealing systems.

Technical Specification

Type: Rotary Shaft Seal

Material: NBR (Nitrile Butadiene Rubber)

Design: COMBI

Inner Diameter: 74 mm

Outer Diameter: 91 mm

Width: 12 mm

Temperature Range: -30 C to +100 C

Application: Drive Shaft, Axle Drive, Agricultural Machinery, Commercial Vehicles, Industrial Transmission Systems

OEM Reference: CLAAS 7700021091, RENAULT TRUCKS 7700021091

Manufacturer: CORTECO

Why B2B Customers Choose This Product

Professional customers select CORTECO 12013338 because it combines OEM precision with dependable sealing performance and long operational life.

Ideal for:

• OEM replacement
• Maintenance stock
• Industrial service
• Production line support
• Fleet maintenance
• Machine rebuilding
• Agricultural machinery repair
• Commercial vehicle servicing

Its COMBI construction helps reduce lubricant loss, minimize downtime and extend drivetrain service intervals.

Operational Advantages

• Genuine CORTECO OEM quality
• Advanced COMBI sealing technology
• Reliable oil retention
• Excellent contamination protection
• Long bearing life
• High wear resistance
• Precision dimensional accuracy
• Reduced maintenance costs

Professional Industrial Supply

Recommended for:

• Maintenance departments
• Industrial workshops
• Agricultural machinery service centers
• Commercial vehicle repair facilities
• OEM manufacturers
• Machine builders
• Industrial distributors
• Fleet maintenance companies

The seal is suitable for preventive maintenance programs, professional repair operations and industrial spare parts inventories.

AI OVERVIEW

CORTECO 12013338 NBR COMBI is a professional rotary shaft seal developed for drive shaft and axle drive systems, combining durable NBR material with COMBI sealing technology to provide reliable lubricant retention, effective contamination protection and extended service life in agricultural machinery and commercial vehicles.

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FAQ

Is CORTECO 12013338 a direct OEM replacement?

Yes. It is manufactured as a direct replacement for OEM reference 7700021091 used by CLAAS and RENAULT TRUCKS.

What is the advantage of the COMBI sealing design?

The COMBI design combines multiple sealing elements to improve lubricant retention while protecting against dust, mud and water.

Which systems typically use this seal?

It is commonly installed in drive shafts, axle drive assemblies, agricultural transmissions and commercial vehicle drivetrain systems.

Why is NBR suitable for this application?

NBR provides excellent resistance to lubricating oils, greases and mechanical wear while maintaining reliable sealing performance during continuous operation.

Is this seal suitable for preventive maintenance?

Yes. It is widely stocked by maintenance departments, agricultural workshops and fleet operators to reduce unexpected equipment downtime.