NSK NU 216 ET 80x140x26 mm Cylindrical Roller Bearing

Heavy-Duty Cylindrical Bearing for Industrial Applications

High radial load capacity, floating inner ring, durable construction

The NSK NU 216 ET is a single-row cylindrical roller bearing with dimensions 80 mm (bore) x 140 mm (outer diameter) x 26 mm (width). Designed for demanding industrial tasks, it features a ribless inner ring and flanged outer ring — this “NU” design allows axial displacement of the shaft relative to the housing, which compensates for shaft elongation or misalignment under load or temperature changes. As an open bearing (without seals), it enables flexible lubrication, tailored to the specific operating environment.

The roller-based design ensures very high radial load capacity, minimal rolling resistance and long service life even under continuous heavy-duty operation.

Key Benefits & Typical Applications

• Exceptional radial load bearing — ideal for heavy shafts, gearboxes, pumps, presses, conveyors and heavy-duty industrial machinery

• Floating inner ring (NU design) — allows axial shaft displacement, compensating for thermal expansion or shaft movement without generating additional stresses

• Open configuration — customizable lubrication — enables selection of grease or oil depending on working conditions, facilitating maintenance and extending bearing life

• Robust construction and proven durability — suitable for continuous operation, harsh industrial environments, and dynamic loading

• Standard dimensions for easy integration — straightforward replacement or retrofitting in housings, flanges or existing shaft assemblies

Common applications include heavy-duty gearboxes, industrial drives, pumps, compressors, conveyor systems, production machinery, and any installation requiring reliable radial load support and axial displacement tolerance.

Detailed Description

The NSK NU 216 ET 80x140x26 mm bearing is engineered as a high-capacity cylindrical roller bearing for industrial environments where reliability, load capacity and maintenance flexibility are essential. Its cylindrical roller elements distribute radial loads evenly across a large contact area, minimizing stress on individual rollers and raceways. This results in reduced wear, low friction, and extended operational life, even under heavy load conditions.

The NU design — with a ribbed outer ring and ribless inner ring — allows the inner ring to move axially within the housing. This floating capability accommodates minor axial displacements of the shaft caused by thermal expansion, shaft deflection or misalignment, preventing undue stress and potential damage. This makes the bearing especially useful in long shafts, multi-segment assemblies, or installations subject to temperature variations.

Because the bearing is open and unsealed, lubrication is not predefined. This flexibility permits operators to choose appropriate grease or oil based on application conditions — whether low-speed heavy-load tasks, high-speed operation, or variable temperature environments. Proper lubrication combined with the bearing’s durable design ensures long-term reliable service.

Standard dimensions (80x140x26 mm) make the bearing easy to install in standard housings or replace existing components without modification. This simplifies maintenance and reduces downtime, especially in heavy-duty applications such as gearboxes, pumps, industrial drives, conveyor systems, or large rotating assemblies.

For industries requiring robust radial load handling, axial displacement compensation, high reliability and flexibility in lubrication, the NSK NU 216 ET provides an optimal bearing solution, ensuring machinery longevity and operational efficiency.

FAQ - Frequently Asked Questions

Is NU 216 ET suitable for heavy radial loads?
Yes — the cylindrical roller design and robust cage make it excellent for large radial loads in heavy-duty equipment.

Can NU 216 ET accommodate shaft axial movement?
Yes — the ribless inner ring design allows axial displacement of the shaft relative to the housing, useful for thermal expansion or misalignment.

Does this bearing require external lubrication?
Yes — as an open bearing (without seals), correct lubrication (grease or oil) must be applied and maintained according to the operating conditions.

Is NU 216 ET good for high-speed operation?
While primarily designed for radial load capacity and durability, its roller and cage design allows stable performance at moderate to high speeds if properly lubricated and mounted.

In what machines or systems is this bearing most commonly used?
Heavy-duty gearboxes, industrial drive shafts, pumps, compressors, conveyor systems, production machines, heavy equipment — wherever high radial loads and shaft movement tolerance are needed.