CORTECO 12018594 Rotary Shaft Seal 85x130x10/21 FPM/NBR

Product Overview

The CORTECO 12018594 rotary shaft seal is a high-performance oil seal designed for demanding industrial and automotive applications, particularly in heavy-duty driveline systems. Manufactured using a dual-material compound (FPM/NBR), this shaft seal ensures long-term resistance to high temperatures, oils, grease, and abrasion. Its RWDR-K7 HSRD cassette-style construction and right-hand helix design provide optimized lubrication return and extended service life, making it suitable for differential input shafts and rear axle assemblies in MAN commercial vehicles.

Key Applications

This rotary shaft seal is commonly used in:
• Rear axle assemblies
• Differential input shafts
• Powertrain and driveline systems
• Heavy commercial trucks and buses
• Industrial gearboxes and rotating machinery

OEM cross-references:
MAN - 81965030424 / 81965030563
CORTECO - 82018594

The right-hand twist sealing lip improves oil return efficiency under rotation, maintaining stable lubrication film and preventing leakage even under fluctuating pressure and load.

Advantages and Performance Features

• High durability due to composite FPM/NBR structure
• Outstanding resistance to oils, gear lubricants, hydraulic fluids, and high operating temperatures
• Cassette-style sealing enhances protection from dust, contaminants, and abrasive particles
• Suitable for high rotational speeds and continuous heavy-duty operation
• Specifically engineered for MAN driveline assemblies

Technical Data (Summary)

• Size: 85 x 130 x 10/21 mm
• Type: Rotary Shaft Seal / Cassette Seal
• Material: FPM (fluoroelastomer) + NBR (nitrile)
• Profile: RWDR-K7 HSRD, Right-Hand Twist sealing lip
• Application: Rear axle / differential input / inlet side

FAQ

1. What is the advantage of an FPM/NBR composite seal?
FPM provides excellent high-temperature and chemical resistance, while NBR offers elasticity and durability, resulting in optimal performance under heavy mechanical and thermal load.

2. What does RWDR-K7 HSRD mean?
It is a cassette-type sealing profile with integrated protective features that improve lubrication control and shield the sealing lip from contaminants.

3. How do I confirm compatibility with a MAN vehicle?
Match OEM numbers (e.g., 81965030424, 81965030563) and dimensional specifications (85x130x10/21). When in doubt, contact technical support.

4. Is this a double lip or single lip seal?
This is a cassette-style multi-lip oil seal offering enhanced sealing security.