Cylindrical Roller Bearings | NSK Americas

Cylindrical roller bearings (CRBs) have a simple structure of cylindrical rollers in linear contact with the raceways. They offer high load capacity under primarily radial loads. Low friction between the rollers and ring ribs makes these bearings suited for high speed rotation.

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Single-row bearings are designated as NU, NJ, NUP, N, or NF, while double-row bearings are designated as NNU or NN, depending on if side ribs are used. All types allow the inner and outer rings to be separated.

Some CRBs used as free-end bearings have no ribs so that the rings can move axially relative to each other. When the inner or outer ring has ribs on both sides and the other ring has a rib on one side, these bearings can take some axial load in one direction.

Double-row cylindrical roller bearings(ru,fr,pt) have high radial rigidity and are used primarily for the main shafts of precision machine tools. Cages are typically made of pressed steel or machined brass, but molded polyamide resin cages are used for some models.

NSK offers a variety of CRB types to suit your needs.

This is because plain cylindrical bearings have more contact surface area than rolling element bearings, so loads are more evenly distributed across the surface. Cylindrical bearing applications may include applications with either radial or axial loads.

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GGB'S CYLINDRICAL BEARINGS DESIGN, MATERIALS & BENEFITS

Switching from rolling element bearings to GGB cylindrical bearings results in savings from lower parts costs, low-risk assembly and installation, relaxed shaft tolerances and surface finish plus hardness requirements. Cylindrical bearings resist damage from fatigue, shock and edge loads, and they tolerate misalignment better than rolling element bearings. Ultimately, customers will experience savings from lower maintenance costs and extended equipment life.

Cylindrical bearings have straight outside and inside diameters and are flush inside the housing. Due to their simple construction, cylindrical bearings are easy to install with a simple press fitting, reducing potential installation damage. They are slim, which saves space and weight, and cylindrical bearing sizes vary according to their use and client needs.

GGB offers many shapes, sizes and materials of cylindrical bearings, including:

• Metals and Bimetals,
• Metal-Polymers,
• Engineered Plastics,
• Fiber Reinforced Composites and more.

WHAT ARE CYLINDRICAL BEARINGS USED FOR?

Cylindrical bearings are extremely versatile and may be used for many applications. Common cylindrical bearing uses include:

• Agricultural Equipment
• Air Conditioning Compressors
• Pumps
• Engine Rocker Arms
• Gearboxes and Transmission Systems
• Kingpins
• Road Sweepers
• Steering Systems
• Throttle Butterfly Valves
• Wind Turbines

Additional uses may include offshore FPSO systems, brake mechanisms, alternators and starter motors.