SUCCESS REPORTS
SUCCESS REPORTS
NTN success reports
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NTN Maximum Capacity Type Double-Row Angular Contact Ball Bearings Eliminate Pump Failures at Chemical Plant


Success Report: Maximum Capacity Type Double-Row Angular Contact Ball Bearings

A major US-based chemical production plant was experiencing repeated, premature bearing failures on the screw pumps in the titanium dioxide production process. The repetitive failures of the large bearings on these pumps created product quality problems and required eight pumps to be rebuilt every month, causing costly downtime at a rate of $400,000 per month.

NTN’s engineering and sales support team ran a comprehensive failure analysis of the plant’s screw pumps. They discovered that the competitor’s bearings were only lasting an average of one week due to a design with steel cages that could not stand up to the contaminated conditions.

The NTN Solution


NTN’s team concluded that the plant needed to change from bearings with steel cages to a product equipped with highly durable brass cages and prescribed NTN’s 3300 Series Maximum Capacity Type double-row angular contact ball bearings. Our Max Type double-row angular contact ball bearings are designed to provide higher load capabilities.

The Result


The NTN solution never failed! The Max Type double-row angular contact ball bearings successfully ran from installation to the plant’s regularly-scheduled, monthly preventative maintenance pump rebuilds. The increased bearing life, reduced maintenance and other related costs, resulted in over $4.6 million in savings in just one year. The plant personnel were so satisfied with the improved lifetime of the screw pumps that they now only use NTN Max Type double-row angular
contact ball bearings on these pumps.

Value added breakdown


MAINTENANCE REDUCTION $4,200,000
INCREASED BEARING LIFE $179,424
REDUCED ACQUISITION COST $14,936
LABOR SAVINGS $282,240
DOCUMENTED COST SAVINGS $4,676,600

ANNUALIZED COST SAVINGS $4,676,600

NTN Maximum Capacity Type Double-Row Angular Contact Ball Bearings

• Maximum capacity design provides higher load capability and longer life when compared to traditional double row angular contact ball bearings
• High strength machined bronze cage used for heavy duty applications supplied standard for bore sizes 70mm / 2.755” and larger
• Designed in a back-to-back arrangement for high rigidity in rotating shaft applications
• Versatile contact angle provides high thrust capability while maintaining high speed capability

Let us pump your production up to full volume.

We’re here to help you achieve your productivity and performance goals. For more information, contact your NTN Sales Representative or call 1-888-412-4122. For technical questions, email techsupport@ntn.ca.