CORTECO 12015526 Rotary Shaft Seal 19.05x34.6x4.4/5.9

Application and Technical Features of the CORTECO 12015526 Seal

The CORTECO 12015526 BASLSFX7 is a precision-engineered rotary shaft seal (oil seal) designed to protect rotating shafts, bearing housings, and bearing units from oil leakage and external contamination. Manufactured from NBR (nitrile butadiene rubber), it combines excellent mechanical strength, flexibility, and resistance to oils, greases, and fuels, ensuring long-term performance in industrial and automotive applications.

With compact dimensions 19.05x34.6x4.4/5.9 mm, this oil seal is commonly used in motors, pumps, reducers, and gearboxes, as well as in precision assemblies with ball bearings or roller bearings. Its design type BASLSFX7 includes a spring-loaded sealing lip and an additional dust lip, providing dual protection against lubricant loss and ingress of dirt or moisture — a key factor in extending component life in high-speed and high-vibration environments.

Thanks to its stable structure and reliable sealing geometry, the CORTECO 12015526 maintains consistent pressure distribution on the shaft surface, reducing wear and ensuring high durability even during continuous operation. The elastomer’s resistance to oil degradation and temperature variation makes it a proven choice for demanding industrial machinery, automotive transmissions, and mechanical drives.

Application and Compatibility

• Suitable for rotating shafts, drive systems, gearboxes, and bearing units.

• Designed for use in industrial applications, including motors, pumps, compressors, and agricultural machinery.

• Compatible with ball bearings and bearing housings that require oil retention and dust exclusion.

• Ideal for systems using mineral oils, lithium greases, or transmission fluids.

• Dimensions: 19.05 mm (ID) x 34.6 mm (OD) x 4.4/5.9 mm (width) - a compact yet highly effective sealing profile.

Construction, Material and Technical Features

• Material: NBR (nitrile rubber) - high elasticity and oil resistance.

• Type: BASLSFX7 - single spring-loaded sealing lip with additional dust lip for double protection.

• Reinforcement: Steel case reinforcement for dimensional stability in the bearing housing.

• Temperature range: −30 °C to +100 °C (short-term peaks up to +120 °C).

• Rotation: Bidirectional - suitable for both clockwise and counterclockwise shafts.

• Properties: Excellent sealing performance, low friction, and long service life.

The use of nitrile rubber (NBR) ensures excellent chemical compatibility and wear resistance, making this seal reliable even in heavy-duty, oil-lubricated environments.

Installation and Bearing Unit Integration

During installation, apply uniform pressure around the outer edge to prevent deformation. Lightly lubricate the sealing lip and shaft surface with compatible grease before assembly to minimize start-up friction.

In bearing units and housings, this seal maintains the integrity of the lubrication system, preventing oil leakage and contamination. Its dual-lip configuration helps retain grease inside while keeping dust, dirt, and moisture out — crucial for ensuring the longevity of ball bearings and related components.

Routine inspection and timely replacement of the seal at the first signs of wear or leakage can prevent costly downtime and protect surrounding mechanical parts.

FAQ - Frequently Asked Questions

1. What is the CORTECO 12015526 rotary shaft seal used for?
It is designed to seal rotating shafts, bearings, and gearboxes, preventing oil leakage and contamination in industrial and automotive systems.

2. What material is used for this oil seal?
It is made from NBR (nitrile butadiene rubber), offering excellent resistance to oil, grease, and temperature variations.

3. What does BASLSFX7 mean?
It refers to a specific seal design: a spring-reinforced sealing lip with an additional dust lip for enhanced external protection.

4. Can this seal be used with bearing housings and units?
Yes, it is ideal for use with bearing housings, ball bearings, and bearing units in both automotive and industrial applications.

5. What is the operating temperature range?
From −30 °C to +100 °C, with short-term resistance up to +120 °C, depending on the lubricant used.