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Axial excluder seals specifically developed to meet the challenges facing the wind industry

2013 November 03, 14:09 CET

Utilizing the innovative design and the excellent abrasion resistance of the special H-ECOPUR® polyurethane, the HRC1 axial excluder seal from SKF can substantially extend seal service life.


Gothenburg, 16 October 2013:SKF launches the axial excluder seal, especially designed for the wind market, that addresses the harsh conditions that wind turbine main shafts face. The axial excluder seal can deliver significantly extended service life and contaminant protection for increased wind turbine reliability and reduced maintenance costs. Ultimately, the seal can help wind farm operators reduce the risks of contaminant-related bearing failures and the high unplanned downtime, repair and lost productivity costs that follow.


“With this exceptional service life extension, the seal can meet standard wind farm maintenance inspection schedules – a tremendous advantage in terms of more cost-effective maintenance scheduling”, says María Concepción Martín, Product Manager SKF Sealing Solutions.


Up to now, the wind industry has had to rely on standard rubber excluder seals available in the market for general industry that didn’t consider, let alone meet, the challenges found in wind turbine main shafts. These rubber excluder seals can wear out quickly, as they are not capable of handling the rough counterface surfaces and limited lubrication conditions.


The HRC1 axial excluder seal from SKF is designed to overcome these challenges. This seal is manufactured from a special H-ECOPUR, an SKF-developed polyurethane material with excellent abrasion resistance and tear strength. Available in solid and split executions, this seal also features a steel band clamp with a fast-lock mechanism for easy up-tower installations.


Working closely with a prominent wind turbine manufacturer, SKF subjected the HRC1 axial excluder seal to an extended field trial. Following installation on 40 separate 2,5 MW turbines, the seal operated continuously under real-world conditions. After three months, an initial inspection revealed some normal running-in wear of the seals. Six months later, only minimal additional wear could be detected.


“This field trial helped confirm that the HRC1 axial excluder seal from SKF can provide drastically extended service life compared to conventional rubber excluder seals,” says  María Concepción Martín.


All SKF products for the Wind industry are part of the SKF BeyondZero portfolio.*


*The SKF BeyondZero product portfolio contains products that offer enhanced environmental performance characteristics. To be included in the SKF BeyondZero portfolio, SKF products, services and solutions must deliver significant environmental benefits.

SKF is a leading global supplier of bearings, seals, mechatronics, lubrication systems, and services which include technical support, maintenance and reliability services, engineering consulting and training. SKF is represented in more than 130 countries and has around 15,000 distributor locations worldwide. Annual sales in 2012 were SEK 64,757 million and the number of employees was 46,775.

® SKF is a registered trademark of the SKF Group.
™ BeyondZero is a trademark of the SKF Group.

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