Corteco 12011385B 50x64x10 - Rotary Shaft Seal NBR

Applications

The Corteco 12011385B rotary shaft seal (50x64x10 mm) is designed for high-performance sealing in automotive and industrial systems. It is widely used as an oil seal and shaft sealing ring in engines, gear assemblies, and rotating machinery. Fully compatible with OE references Mercedes-Benz 0019974746 / A0019974746, it provides a reliable solution in service and maintenance applications where durable and precise shaft sealing is required.

Advantages

Manufactured from high-quality NBR (nitrile butadiene rubber), this shaft seal ensures excellent resistance to oils, grease, fuel, and mechanical wear. Its optimised geometry guarantees stable performance under dynamic load, protecting components from oil leakage and contamination. The material and design make this seal suitable for demanding industrial and automotive environments requiring long service life and high durability.

Technical Data

• Brand: Corteco

• Article number: 12011385B / 82011385 / B1SF

• Dimensions: 50 x 64 x 10 mm

• Material: NBR (nitrile rubber)

• Inner diameter: 50 mm

• Outer diameter: 64 mm

• Height: 10 / 13 mm

• OE Reference: Mercedes-Benz 0019974746 / A0019974746

• Applications: engines, transmissions, drive shafts, industrial equipment

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Product Description

The Corteco 12011385B is a professional-grade rotary shaft seal engineered for systems requiring dependable oil retention and protection against contaminants. Produced from durable NBR, this oil seal provides stable sealing performance in environments exposed to lubricants, pressure fluctuations, and rotational loads.

The seal’s construction ensures optimal contact with the shaft, minimising lubricant loss while preventing the ingress of dust and particles. This makes the 12011385B suitable for demanding tasks in automotive engines, gearboxes, powertrain systems, and industrial machinery. Its compatibility with Mercedes-Benz OE references positions it as a trusted replacement component in both workshop and production environments.

As a versatile technical seal, it delivers both operational safety and extended service life—key factors for B2B customers responsible for machine uptime, maintenance planning, and reliability of mechanical systems.

FAQ

1. What is the difference between single and double lip oil seals?

Single lip seals focus on oil retention, while double lip seals add a protective dust lip for improved contamination resistance. Selection depends on operating conditions.

2. What material is used in the Corteco 12011385B?

It is made from NBR, known for its oil and grease resistance, making it ideal for automotive and industrial applications.

3. How do I select the correct shaft seal size?

Match the inner diameter to the shaft, the outer diameter to the housing, and the width to the installation space. Consider medium, temperature, and lip design.

4. Is the 12011385B suitable for Mercedes-Benz engines?

Yes, it corresponds to OE references 0019974746 / A0019974746, making it fully compatible.

5. Does an NBR seal tolerate high temperatures?

NBR offers good performance in standard engine and gearbox temperature ranges, maintaining elasticity and sealing properties.