NSK triple lip seal provides ultimate bearing protection

The Self-Lube® bearing units are engineered to tackle the toughest operational challenges. With a diverse selection of reliable inserts and housings, these affordable solutions simplify the process of mounting bearings without the complexities of special shaft arrangements or intricate housings. They've been designed to allow for easy attachment of bearings to frames and shafts.

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At the forefront of their offerings is the innovative triple lip seal, a single-piece molded nitrile component featuring three distinct sealing lips. Secured by a robust outer steel pressing, which is firmly attached to the outer ring, this advanced sealing mechanism ensures exceptional protection for bearings even in harsh environments filled with dust, sand, water, or slurry.

A notable user of the Self-Lube® bearing units equipped with the triple lip seal is a company that manufactures barrel washers for rinsing vegetables prior to processing. The equipment's bearings often faced submersion in water during the drum's rotation, which led to frequent washout and corrosion, necessitating bearing replacements every three months. To mitigate these ongoing costs, the company sought the expertise of NSK’s engineering team to explore potential solutions.

After a comprehensive evaluation of the application and an assessment of the bearing failures, NSK proposed the implementation of Self-Lube® bearing units featuring the triple lip seal, ideally suited for applications subjected to water intrusion. This strategic modification resulted in an impressive increase in bearing longevity, extending service life to over 7 months—a remarkable 133% enhancement. Consequently, the vegetable washing manufacturer now enjoys a savings of about '56,600 in bearing replacement and maintenance expenses every half-year.

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The structure of Self-Lube® bearing units integrates an insert and a housing, where the inserts are deep-groove ball bearings designed in the widely accepted series configuration, featuring built-in characteristics that enhance their functionality and versatility compared to conventional ball bearings. These inserts are compatible not only with a broad array of RHP housings available from NSK but can also be utilized in scenarios where users opt to utilize their own housing.

NSK provides an extensive range of sizes complemented by various shaft locking methods, such as set screw, eccentric collar, and taper sleeve locking techniques. Additionally, the prolonged re-lubrication intervals significantly lower maintenance costs while amplifying machine productivity.

Image 1): In barrel washers intended for vegetable processing, the bearings are immersed in water throughout the drum's rotation. Photo: iStock.com/zlikovec

The specialized triple lip oil seals are particularly effective in environments rife with contamination, making them ideal for use in agricultural machinery and equipment.

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