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Mining & Aggregate

Rock-solid bearing products that meet the rigorous requirements of the industry.


At the core of every mining operation is a complex array of mining machines, from compact, yet powerful, continuous miners in underground mining to the larger-than-life draglines found in surface mining. Even with some of today’s most complex equipment, mining is still, at its core, a fairly simple process that can be broken down into three basic components: mining, transport and removal.

NTN has bearings for each of these processes. With our experience in the mining, construction, agriculture, and heavy-duty truck markets, we have the products capable of performing in the dirty, harsh environments of mines and exceeding reliability and life requirements.

We offer complete wheel kits for use on the 10SC and 21SC shuttle cars, available as either a complete kit or components. For conveyor-belt drives, we have a complete line of SAF-style pillow blocks, as well as a complete line of premium spherical roller bearings. Additionally, for continuous miners, we offer a complete line of case-carburized, tapered roller bearings for use in cutter heads and gathering pots.


One of the toughest industrial equipment applications for bearings is vibrating screens or shaker screens. NTN has developed a special line of spherical roller bearings specifically designed for the severe applications found in shaker screens and all vibrating equipment. NTN Shaker Screen Sphericals have distinct features that make them ideal for vibrating applications:

  • A solid brass cage that is resistant to vibrations and associated failures
  • Higher standard load rating that enhances bearing life
  • Tighter tolerances that ensure proper operation in vibrating applications


Heavy contamination has been and will always be a major problem in the aggregate industry.

Mining & Aggregate

The current sealing arrangement of SAF units often leads to contamination, which ultimately leads to premature failure. Equipment must then be shut down for repairs, increasing overall costs and cutting dollars out of the bottom line.

Previously, re-lubrication schedules were the only way to prevent these failures. By flushing out the contaminants, maintenance personnel can overcome the inadequate sealing arrangement. However, this method can drastically increase lubrication costs.

NTN’s Heavy Duty Spherical Roller Bearing Mounted Units solve this problem. Available in SPAW, SPW, and SFCW types, these units utilize contact seals to combat heavy contamination issues. The spring-loaded contact seals offer better contamination protection and less grease consumption, while offering greater misalignment capability. Additionally, these units offer the same base-to-shaft-center height and bolt-hole positions as SAF units for easy replacement. Standard one-piece ductile iron housing offers better shock-loading characteristics and quicker mounting and dismounting, when compared to SAF units.