NTN Mounted Bearing Units

About NTN Mounted Bearing Units

NTN Mounted Bearing Units
Regardless of your industry type, NTN offers a diverse series of mounted bearing units to fit your application. Whether for mining, construction, or food processing, NTN has the solution for your industry.

Ultra-Class Series 

NTN's Ultra-Class is the original solid base offering in our mounted bearing unit portfolio. As their flagship bearing unit line, it symbolizes their commitment to performance and reliability. Ideal for applications where elements such as dry particle contamination and moisture are of concern, Ultra-Class provides a wealth of features and benefits to address these challenges. 

Available in metric and inch sizes, Ultra-Class units are made from heavy-duty, solid-cast housings and robust steel cages for optimal load & shock stability. The Ultra-Class line features pillow blocks, two-bolt and four-bolt flange housings. These units are fully assembled, factory sealed and pre-lubricated for easy installation.

Featuring NTN's exclusive ball-point set screw design, the Ultra-Class black-oxide plated insert provides 120* screw orientation to provide superior alignment and centering compared to typical 90* configurations. The semi-retractable, ball-point mechanism's excellent tightening torque characteristics allow 7.5x longer set screw retention life vs. cup point set screws, all without damaging to the shaft or mounting surface.

Green Line Series

The reliable performance and durable construction of NTN's Standard/Green Lines Series bearings makes them a smart solution for practically all types of common applications. Green Line units' unmatched selection of housing styles, insert types as standard makes it NTN's tried and true Mounted Ball Bearing Unit Series.

Green Line units are available in both metric and inch shaft sizes throughout our set screw, eccentric, and adapter sleeve inserts. With bore sizes range from 1/2" to 4", the Green Line is a highly versatile and industry interchangeable product line. The cast iron bearing housing is designed to provide maximum strength in even the toughest applications. With this strength, the ability to allow for misalignment of +/- 2* and relubrication capability, you just can't go wrong.

Green Line units also feature double-sealing construction comprised of an oil-resistant rubber seal and a flinger. The double sealing construction boasts a sealing performance that is much more reliable than standard seals since the ingress path for dust is long, and because excess grease, which purges between the seal and the flinger when the bearing is in operation, serves as a seal.

Green Line Features & Benefits 

* Optimized lubrication hole design to ensure proper relubrication is achieved, even under the misalignment capability of +/2*

* Fully assembled units arrive factory sealed and pre-lubricated for easy installation

* Premium protection from contaminants due to unique flinger design and elastomeric seal

* Heavy-duty, solid-cast housings & robust steel cages for optimal load & shock stability

* Ball-point set screw offers 7.5x longer retention life over cup-point set screws